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                                                                 Exhibit (4)(CE)


                         REGISTRATION RIGHTS AGREEMENT


                                BY AND BETWEEN

                                LTX CORPORATION

                                  AS ISSUER,


                                      AND


                            THE INITIAL PURCHASERS

                                 LISTED HEREIN


                          DATED AS OF AUGUST 8, 2001
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     THIS REGISTRATION RIGHTS AGREEMENT (the "Agreement") is made and entered
into as of August 8, 2001, by and between LTX Corporation, a Massachusetts
corporation (the "Company"), and the Initial Purchasers listed on Exhibit A
(each an "Initial Purchaser" and collectively the "Initial Purchasers") pursuant
to that certain Purchase Agreement, dated August 2, 2001 (the "Purchase
Agreement") between the Company and the Initial Purchasers.

     In order to induce the Initial Purchasers to enter into the Purchase
Agreement, the Company has agreed to provide the registration rights set forth
in this Agreement. The execution of this Agreement is a condition to the closing
under the Purchase Agreement.

     The Company agrees with the Initial Purchasers (i) for their benefit as
Initial Purchasers and (ii) for the benefit of the beneficial owners (including
the Initial Purchasers) from time to time of the Notes (as defined herein) and
the beneficial owners from time to time of the Underlying Common Stock (as
defined herein) issued upon conversion of the Notes (each of the foregoing a
"Holder" and together the "Holders"), as follows:

     Section 1.  Definitions.  Capitalized terms used herein without definition
shall have their respective meanings set forth in the Purchase Agreement. As
used in this Agreement, the following terms shall have the following meanings:

     "Affiliate" means with respect to any specified person, an "affiliate," as
defined in Rule 144, of such person.

     "Amendment Effectiveness Deadline Date" has the meaning set forth in
Section 2(d) hereof.

     "Applicable Conversion Price" as of any date of determination means the
Conversion Price in effect as of such date of determination or, if no Notes are
then outstanding, the Conversion Price that would be in effect were Notes then
outstanding.

     "Business Day" means each Monday, Tuesday, Wednesday, Thursday and Friday
that is not a day on which banking institutions in The City of New York are
authorized or obligated by law or executive order to close.

     "Common Stock" means the shares of common stock, par value $0.05 per share,
of the Company and any other shares of common stock as may constitute "Common
Stock" for purposes of the Indenture, including the Underlying Common Stock.

     "Conversion Price" has the meaning assigned such term in the Indenture.

     "Damages Accrual Period" has the meaning set forth in Section 2(e) hereof.
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     "Damages Payment Date" means each interest payment date under the Indenture
in the case of Notes, and each February 15 and August 15 in the case of the
Underlying Common Stock.

     "Deferral Notice" has the meaning set forth in Section 3(i) hereof.

     "Deferral Period" has the meaning set forth in Section 3(i) hereof.

     "Effectiveness Deadline Date" has the meaning set forth in Section 2(a)
hereof.

     "Effectiveness Period" means the period commencing on the date the Initial
Shelf Registration Statement is declared effective by the SEC and ending on the
date that all Registrable Securities have ceased to be Registrable Securities.

     "Event" has the meaning set forth in Section 2(e) hereof.

     "Event Date" has the meaning set forth in Section 2(e) hereof.

     "Exchange Act" means the Securities Exchange Act of 1934, as amended, and
the rules and regulations of the SEC promulgated thereunder.

     "Filing Deadline Date" has the meaning set forth in Section 2(a) hereof.

     "Holder" has the meaning set forth in the third paragraph of this
Agreement.

     "Indenture" means the Indenture, dated as of August 8, 2001, between the
Company and State Street Bank and Trust Company, as trustee, pursuant to which
the Notes are being issued.

     "Initial Purchasers" has the meaning set forth in the preamble hereof.

     "Initial Shelf Registration Statement" has the meaning set forth in Section
2(a) hereof.

     "Issue Date" means the first date of original issuance of the Notes.

     "Liquidated Damages Amount" has the meaning set forth in Section 2(e)
hereof.

     "Losses" has the meaning set forth in Section 6 hereof.

     "Material Event" has the meaning set forth in Section 3(i) hereof.

     "Notes" means the 4 1/4% Convertible Subordinated Notes due 2006 of the
Company to be purchased pursuant to the Purchase Agreement.

     "Notice and Questionnaire" means a written notice delivered to the Company
containing substantially the information called for by the Selling
Securityholder Notice and Questionnaire attached as Annex A to the Offering
Memorandum of the Company dated August 2, 2001 relating to the Notes.

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     "Notice Holder" means, on any date, any Holder that has delivered a Notice
and Questionnaire to the Company on or prior to such date, so long as all of
their Registrable Securities that have been registered for resale pursuant to a
Notice and Questionnaire have not been sold in accordance with a Registration
Statement.

     "Purchase Agreement" has the meaning set forth in the preamble hereof.

     "Prospectus" means the prospectus included in any Registration Statement
(including, without limitation, a prospectus that discloses information
previously omitted from a prospectus filed as part of an effective registration
statement in reliance upon Rule 430A promulgated under the Securities Act), as
amended or supplemented by any amendment or prospectus supplement, including
post-effective amendments, and all materials incorporated by reference or
explicitly deemed to be incorporated by reference in such Prospectus.

     "Record Holder" means (i) with respect to any Damages Payment Date relating
to any Notes as to which any such Liquidated Damages Amount has accrued, the
holder of record of such Note on the record date with respect to the interest
payment date under the Indenture on which such Damages Payment Date shall occur
and (ii) with respect to any Damages Payment Date relating to the Underlying
Common Stock as to which any such Liquidated Damages Amount has accrued, the
registered holder of such Underlying Common Stock fifteen (15) days prior to
such Damages Payment Date.

     "Registrable Securities" means the Notes until such Notes have been
converted into or exchanged for the Underlying Common Stock and, at all times
the Underlying Common Stock and any securities into or for which such Underlying
Common Stock has been converted or exchanged, and any security issued with
respect thereto upon any stock dividend, split or similar event until, in the
case of any such security, (A) the earliest of (i) its effective registration
under the Securities Act and resale in accordance with the Registration
Statement covering it, (ii) expiration of the holding period that would be
applicable thereto under Rule 144(k) or (iii) its sale to the public pursuant to
Rule 144 (or any similar provision then in force, but not Rule 144A) under the
Securities Act, and (B) as a result of the event or circumstance described in
any of the foregoing clauses (i) through (iii), the legend with respect to
transfer restrictions required under the Indenture are removed or removable in
accordance with the terms of the Indenture or such legend, as the case may be.

     "Registration Expenses" has the meaning set forth in Section 5 hereof.

     "Registration Statement" means any registration statement of the Company
that covers any of the Registrable Securities pursuant to the provisions of this
Agreement including the Prospectus, amendments and supplements to such
registration statement, including post-effective amendments, all exhibits, and
all materials incorporated by reference or explicitly deemed to be incorporated
by reference in such registration statement.

     "Restricted Securities" has the meaning given such term in Rule 144.

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     "Rule 144" means Rule 144 under the Securities Act, as such Rule may be
amended from time to time, or any similar rule or regulation hereafter adopted
by the SEC.

     "Rule 144A" means Rule 144A under the Securities Act, as such Rule may be
amended from time to time, or any similar rule or regulation hereafter adopted
by the SEC.

     "SEC" means the Securities and Exchange Commission.

     "Securities Act" means the Securities Act of 1933, as amended, and the
rules and regulations promulgated by the SEC thereunder.

     "Shelf Registration Statement" has the meaning set forth in Section 2(a)
hereof.

     "Special Counsel" means Testa, Hurwitz & Thibeault, LLP or such other
successor counsel as shall be specified by the Holders of a majority of the
Registrable Securities, but which may, with the written consent of the Initial
Purchasers (which shall not be unreasonably withheld), be another nationally
recognized law firm experienced in securities law matters designated by the
Company, the reasonable fees and expenses of which will be paid by the Company
pursuant to Section 5 hereof.

     "Subsequent Shelf Registration Statement" has the meaning set forth in
Section 2(b) hereof.

     "TIA" means the Trust Indenture Act of 1939, as amended.

     "Trustee" means State Street Bank and Trust Company, the Trustee under the
Indenture.

     "Underlying Common Stock" means the Common Stock into which the Notes are
convertible or issued upon any such conversion.

     Section 2.  Shelf Registration.  (a) The Company shall prepare and file or
cause to be prepared and filed with the SEC, as soon as practicable but in any
event by the date (the "Filing Deadline Date") ninety (90) days after the Issue
Date, a Registration Statement for an offering to be made on a delayed or
continuous basis pursuant to Rule 415 of the Securities Act (a "Shelf
Registration Statement") registering the resale from time to time by Holders
thereof of all of the Registrable Securities (the "Initial Shelf Registration
Statement"). The Initial Shelf Registration Statement shall be on Form S-3 or
another appropriate form permitting registration of such Registrable Securities
for resale by such Holders in accordance with the reasonable methods of
distribution elected by the Holders, approved by the Company, and set forth in
the Initial Shelf Registration Statement. The Company shall use its reasonable
best efforts to cause the Initial Shelf Registration Statement to be declared
effective under the Securities Act as promptly as is practicable but in any
event by the date (the "Effectiveness Deadline Date") that is one hundred eighty
(180) days after the Issue Date, and to keep the Initial Shelf Registration
Statement (or any Subsequent Shelf Registration Statement) continuously
effective under the Securities Act until the earlier of (i) the second
anniversary of the effective date of such registration statement, or (ii)
expiration of the Effectiveness Period. At the time the Initial Shelf

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Registration Statement is declared effective, each Holder that became a Notice
Holder on or prior to the date ten (10) Business Days prior to such time of
effectiveness shall be named as a selling securityholder in the Initial Shelf
Registration Statement and the related Prospectus in such a manner as to permit
such Holder to deliver such Prospectus to purchasers of Registrable Securities
in accordance with applicable law. None of the Company's security holders (other
than the Holders of Registrable Securities) shall have the right to include any
of the Company's securities in the Shelf Registration Statement.

       (b)  If the Initial Shelf Registration Statement or any Subsequent Shelf
Registration Statement ceases to be effective for any reason at any time during
the Effectiveness Period, the Company shall use its best efforts to obtain the
prompt withdrawal of any order suspending the effectiveness thereof, and in any
event shall within thirty (30) days of such cessation of effectiveness amend the
Shelf Registration Statement in a manner reasonably expected to obtain the
withdrawal of the order suspending the effectiveness thereof, or file an
additional Shelf Registration Statement covering all of the securities that as
of the date of such filing are Registrable Securities (a "Subsequent Shelf
Registration Statement"). If a Subsequent Shelf Registration Statement is filed,
the Company shall use its best efforts to cause the Subsequent Shelf
Registration Statement to become effective as promptly as is practicable after
such filing and to keep such Registration Statement (or subsequent Shelf
Registration Statement) continuously effective until the end of the
Effectiveness Period.

       (c)  The Company shall supplement and amend the Shelf Registration
Statement if required by the rules, regulations or instructions applicable to
the registration form used by the Company for such Shelf Registration Statement,
if required by the Securities Act or as reasonably requested by the Initial
Purchasers or by the Trustee on behalf of the Holders of the Registrable
Securities covered by such Shelf Registration Statement.

       (d)  Each Holder of Registrable Securities agrees that if such Holder
wishes to sell Registrable Securities pursuant to a Shelf Registration Statement
and related Prospectus, it will do so only in accordance with this Section 2(d)
and Section 3(i). Each Holder of Registrable Securities wishing to sell
Registrable Securities pursuant to a Shelf Registration Statement and related
Prospectus agrees to deliver a Notice and Questionnaire to the Company prior to
any intended distribution of Registrable Securities under the Shelf Registration
Statement. From and after the date the Initial Shelf Registration Statement is
declared effective, the Company shall, as promptly as practicable after the date
a Notice and Questionnaire is delivered, and in any event upon the later of (x)
five (5) Business Days after such date or (y) five (5) Business Days after the
expiration of any Deferral Period in effect when the Notice and Questionnaire is
delivered or put into effect within five (5) Business Days of such delivery
date, (i) if required by applicable law, file with the SEC a post-effective
amendment to the Shelf Registration Statement or, if required by applicable law,
prepare and file a supplement to the related Prospectus or a supplement or
amendment to any document incorporated therein by reference or file any other
required document so that the Holder delivering such Notice and Questionnaire is
named as a selling securityholder in the Shelf Registration Statement and the
related Prospectus in such a manner as to permit such Holder to deliver such
Prospectus to purchasers of the Registrable Securities in accordance with
applicable law and, if the Company shall file a post-effective amendment to the

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Shelf Registration Statement, use its reasonable efforts to cause such post-
effective amendment to be declared effective under the Securities Act as
promptly as is practicable, but in any event by the date (the "Amendment
Effectiveness Deadline Date") that is forty-five (45) days after the date such
post-effective amendment is required by this clause to be filed; (ii) provide
such Holder copies of any documents filed pursuant to Section 2(d)(i); and (iii)
notify such Holder as promptly as practicable after the effectiveness under the
Securities Act of any post-effective amendment filed pursuant to Section
2(d)(i); provided, that if such Notice and Questionnaire is delivered during a
Deferral Period, or a Deferral Period is put into effect within five (5)
Business Days after such delivery date, the Company shall so inform the Holder
delivering such Notice and Questionnaire and shall take the actions set forth in
clauses (i), (ii) and (iii) above within five (5) Business Days after expiration
of the Deferral Period in accordance with Section 3(i). Notwithstanding anything
contained herein to the contrary, (i) the Company shall be under no obligation
to name any Holder that is not a Notice Holder as a selling securityholder in
any Registration Statement or related Prospectus and (ii) the Amendment
Effectiveness Deadline Date shall be extended by up to ten (10) Business Days
from the expiration of a Deferral Period (and the Company shall incur no
obligation to pay Liquidated Damages during such extension) if such Deferral
Period shall be in effect on the Amendment Effectiveness Deadline Date.

       (e)  The parties hereto agree that the Holders of Registrable Securities
will suffer damages, and that it would not be feasible to ascertain the extent
of such damages with precision, if (i) the Initial Shelf Registration Statement
has not been filed on or prior to the Filing Deadline Date, (ii) the Initial
Shelf Registration Statement has not been declared effective under the
Securities Act on or prior to the Effectiveness Deadline Date, (iii) the Company
has failed to perform its obligations set forth in Section 2(d) within the time
periods required therein, (iv) the aggregate duration of Deferral Periods in any
period exceeds the number of days permitted in respect of such period pursuant
to Section 3(i) hereof or (v) the number of Deferral Periods in any period
exceeds the number permitted in respect of such period pursuant to Section 3(i)
hereof (each of the events of a type described in any of the foregoing clauses
(i) through (v) are individually referred to herein as an "Event," and the
Filing Deadline Date in the case of clause  (i), the Effectiveness Deadline Date
in the case of clause (ii), the date by which the Company is required to perform
its obligations set forth in Section 2(d) in the case of clause (iii) (including
the filing of any post-effective amendment prior to the Amendment Effectiveness
Deadline Date), the date on which the aggregate duration of Deferral Periods in
any period exceeds the number of days permitted by Section 3(i) hereof in the
case of clause (iv), and the date of the commencement of a Deferral Period that
causes the limit on the number of Deferral Periods in any period under Section
3(i) hereof to be exceeded in the case of clause (v), being referred to herein
as an "Event Date"). Events shall be deemed to continue until the following
dates with respect to the respective types of Events: the date the Initial Shelf
Registration Statement is filed in the case of an Event of the type described in
clause (i), the date the Initial Shelf Registration Statement is declared
effective under the Securities Act in the case of an Event of the type described
in clause  (ii), the date the Company performs its obligations set forth in
Section 2(d) in the case of an Event of the type described in clause (iii)
(including, without limitation, the date the relevant post-effective amendment
to the Shelf Registration Statement is declared effective under the Securities
Act), termination of the Deferral Period that caused the limit on the aggregate
duration of Deferral Periods in a period set forth in Section 3(i) to be
exceeded in the

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case of the commencement of an Event of the type described in clause (iv), and
termination of the Deferral Period the commencement of which caused the number
of Deferral Periods in a period permitted by Section 3(i) to be exceeded in the
case of an Event of the type described in clause (v).

     Accordingly, commencing on (and including) any Event Date and ending on
(but excluding) the next date on which there are no Events that have occurred
and are continuing (a "Damages Accrual Period"), the Company agrees to pay, as
liquidated damages and not as a penalty, an amount (the "Liquidated Damages
Amount"), payable on the Damages Payment Dates to Record Holders of Notes that
are Registrable Securities and of shares of Underlying Common Stock issued upon
conversion of Notes that are Registrable Securities, as the case may be,
accruing, for each portion of such Damages Accrual Period beginning on and
including a Damages Payment Date (or, if the first date of any Damages Accrual
Period for which the Liquidated Damages Amount is to be paid to Holders as a
result of the occurrence of any particular Event is other than a Damages Payment
Date, then the Event Date) and ending on but excluding the first to occur of (A)
the date of the end of the Damages Accrual Period or (B) the next Damages
Payment Date, at a rate per annum equal to one-half of one percent (0.5%) of (i)
the aggregate principal amount of such Notes or, without duplication, (ii) in
the case of Notes that have been converted into or exchanged for Underlying
Common Stock, the Applicable Conversion Price of such shares of Underlying
Common Stock, as the case may be, in each case determined as of the Business Day
immediately preceding the next Damages Payment Date; provided, that in the case
of a Damages Accrual Period that is in effect solely as a result of an Event of
the type described in clause (iii) of the immediately preceding paragraph, such
Liquidated Damages Amount shall be paid only to the Holders that have delivered
Notice and Questionnaires that caused the Company to incur the obligations set
forth in Section 2(d) the non-performance of which is the basis of such Event,
provided further, that any Liquidated Damages Amount accrued with respect to any
Note or portion thereof called for redemption on a redemption date or converted
into Underlying Common Stock on a conversion date prior to the Damages Payment
Date, shall, in any such event, be paid instead to the Holder who submitted such
Note or portion thereof for redemption or conversion on the applicable
redemption date or conversion date, as the case may be, on such date (or
promptly following the conversion date, in the case of conversion).
Notwithstanding the foregoing, no Liquidated Damages Amounts shall accrue as to
any Registrable Security from and after the earlier of (x) the date such
security is no longer a Registrable Security and (y) expiration of the
Effectiveness Period. The rate of accrual of the Liquidated Damages Amount with
respect to any period shall not exceed the rate provided for in this paragraph
notwithstanding the occurrence of multiple concurrent Events. Following the cure
of all Events requiring the payment by the Company of Liquidated Damages Amounts
to the Holders of Registrable Securities pursuant to this Section, the accrual
of Liquidated Damages Amounts will cease (without in any way limiting the effect
of any subsequent Event requiring the payment of Liquidated Damages Amount by
the Company).

     The Trustee shall be entitled, on behalf of Holders of Notes or Underlying
Common Stock, to seek any available remedy for the enforcement of this
Agreement, including for the payment of any Liquidated Damages Amount.
Notwithstanding the foregoing, the parties agree

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that the sole damages payable for a violation of the terms of this Agreement
with respect to which liquidated damages are expressly provided shall be such
liquidated damages.

     All of the Company's obligations set forth in this Section 2(e) that are
outstanding with respect to any Registrable Security at the time such security
ceases to be a Registrable Security shall survive until such time as all such
obligations with respect to such security have been satisfied in full
(notwithstanding termination of this Agreement pursuant to Section 8(k)).

     The parties hereto agree that the liquidated damages provided for in this
Section 2(e) constitute a reasonable estimate of the damages that may be
incurred by Holders of Registrable Securities by reason of the failure of the
Shelf Registration Statement to be filed or declared effective or available for
effecting resales of Registrable Securities in accordance with the provisions
hereof.

     Section 3.  Registration Procedures.  In connection with the registration
obligations of the Company under Section 2 hereof, the Company shall:

       (a)  Prepare and file with the SEC a Registration Statement or
Registration Statements on any appropriate form under the Securities Act
available for the sale of the Registrable Securities by the Holders thereof in
accordance with the intended method or methods of distribution thereof, and use
its reasonable efforts to cause each such Registration Statement to become
effective and remain effective as provided herein; provided, that before filing
any Registration Statement or Prospectus or any amendments or supplements
thereto with the SEC, the Company shall furnish to the Initial Purchasers and
the Special Counsel copies of all such documents proposed to be filed and use
its reasonable efforts to reflect in each such document when so filed with the
SEC such comments as the Special Counsel reasonably shall propose and shall be
reasonably acceptable to the Company within two (2) Business Days of the
delivery of such copies to the Initial Purchasers and the Special Counsel.

       (b)  Prepare and file with the SEC such amendments and post-effective
amendments to each Registration Statement as may be necessary to keep such
Registration Statement continuously effective for the applicable period
specified in Section 2(a); cause the related Prospectus to be supplemented by
any required Prospectus supplement, and as so supplemented to be filed pursuant
to Rule 424 (or any similar provisions then in force) under the Securities Act;
and use its reasonable best efforts to comply with the provisions of the
Securities Act applicable to it with respect to the disposition of all
securities covered by such Registration Statement during the Effectiveness
Period in accordance with the intended methods of disposition by the sellers
thereof set forth in such Registration Statement as so amended or such
Prospectus as so supplemented.

       (c)  As promptly as practicable give notice to the Notice Holders, the
Initial Purchasers and the Special Counsel (i) when any Prospectus, Prospectus
supplement, Registration Statement or post-effective amendment to a Registration
Statement has been filed with the SEC and, with respect to a Registration
Statement or any post-effective amendment, when the same has been declared
effective, (ii) of any request, following the effectiveness of the Initial Shelf
Registration

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Statement under the Securities Act, by the SEC or any other federal or state
governmental authority for amendments or supplements to any Registration
Statement or related Prospectus or for additional information, (iii) of the
issuance by the SEC or any other federal or state governmental authority of any
stop order suspending the effectiveness of any Registration Statement or the
initiation or threatening of any proceedings for that purpose, (iv) of the
receipt by the Company of any notification with respect to the suspension of the
qualification or exemption from qualification of any of the Registrable
Securities for sale in any jurisdiction or the initiation or threatening of any
proceeding for such purpose, (v) after the effective date of any Registration
Statement filed pursuant to this Agreement of the occurrence of (but not the
nature of or details concerning) a Material Event and (vi) of the determination
by the Company that a post-effective amendment to a Registration Statement will
be filed with the SEC, which notice may, at the discretion of the Company (or as
required pursuant to Section 3(i)), state that it constitutes a Deferral Notice,
in which event the provisions of Section 3(i) shall apply.

       (d)  Use reasonable efforts to obtain the withdrawal of any order
suspending the effectiveness of a Registration Statement or the lifting of any
suspension of the qualification (or exemption from qualification) of any of the
Registrable Securities for sale in any jurisdiction in which they have been
qualified for sale, in either case at the earliest possible moment, and provide
prompt notice to each Notice Holder and the Initial Purchasers of the withdrawal
of any such order.

       (e)  If reasonably requested by the Initial Purchasers or any Notice
Holder, as promptly as practicable incorporate in a Prospectus supplement or
post-effective amendment to a Registration Statement such information as the
Initial Purchasers, the Special Counsel or such Notice Holder shall, on the
basis of a written opinion of nationally-recognized counsel experienced in such
matters, determine to be required to be included therein by applicable law and
make any required filings of such Prospectus supplement or such post-effective
amendment provided that the Company shall not be required to take any actions
under this Section 3(e) that, in the written opinion of counsel for the Company,
are not in compliance with appliance law.

       (f)  As promptly as practicable furnish to each Notice Holder, the
Special Counsel and the Initial Purchasers, without charge, at least one (1)
conformed copy of the Registration Statement and any amendment thereto,
including financial statements but excluding schedules, all documents
incorporated or deemed to be incorporated therein by reference and all exhibits
(unless requested in writing to the Company by such Notice Holder, Special
Counsel, counsel or Initial Purchasers).

       (g)  During the Effectiveness Period, deliver to each Notice Holder, the
Special Counsel and the Initial Purchasers, in connection with any sale of
Registrable Securities pursuant to a Registration Statement, without charge, as
many copies of the Prospectus or Prospectuses relating to such Registrable
Securities (including each preliminary prospectus) and any amendment or
supplement thereto as such Notice Holder may reasonably request; and the Company
hereby consents (except during such periods that a Deferral Notice is
outstanding and has not been revoked) to the use of such Prospectus or each
amendment or supplement thereto by each Notice Holder, in connection with any
offering and sale of the Registrable Securities

                                       9
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covered by such Prospectus or any amendment or supplement thereto in the manner
set forth therein.

       (h)  Prior to any public offering of the Registrable Securities pursuant
to the Shelf Registration Statement, use reasonable best efforts to register or
qualify or cooperate with the Notice Holders in connection with the registration
or qualification (or exemption from such registration or qualification) of such
Registrable Securities for offer and sale under the securities or Blue Sky laws
of such jurisdictions within the United States as any Notice Holder reasonably
requests in writing (which request may be included in the Notice and
Questionnaire); prior to any public offering of the Registrable Securities
pursuant to the Shelf Registration Statement, use best efforts to keep each such
registration or qualification (or exemption therefrom) effective during the
Effectiveness Period in connection with such Notice Holder's offer and sale of
Registrable Securities pursuant to such registration or qualification (or
exemption therefrom) and do any and all other acts or things reasonably
necessary or advisable to enable the disposition in such jurisdictions of such
Registrable Securities in the manner set forth in the relevant Registration
Statement and the related Prospectus; provided, that the Company will not be
required to (i) qualify as a foreign corporation or as a dealer in securities in
any jurisdiction where it would not otherwise be required to qualify but for
this Agreement or (ii) take any action that would subject it to general service
of process in suits or to taxation in any such jurisdiction where it is not then
so subject.

       (i)  Upon (A) the issuance by the SEC of a stop order suspending the
effectiveness of the Shelf Registration Statement or the initiation of
proceedings with respect to the Shelf Registration Statement under Section 8(d)
or 8(e) of the Securities Act, (B) the occurrence of any event or the existence
of any fact as a result of which any Registration Statement shall contain any
untrue statement of a material fact or omit to state any material fact required
to be stated therein or necessary to make the statements therein, in light of
the circumstances under which they were made, not misleading, or any Prospectus
shall contain any untrue statement of a material fact or omit to state any
material fact required to be stated therein or necessary to make the statements
therein, in the light of the circumstances under which they were made, not
misleading, or (C) the occurrence or existence of any pending corporate
development (a "Material Event") that, in the reasonable discretion of the
Company, makes it appropriate to suspend the availability of the Shelf
Registration Statement and the related Prospectus, (i) in the case of clause (B)
above, subject to the next sentence, as promptly as practicable prepare and
file, if necessary pursuant to applicable law, a post-effective amendment to
such Registration Statement or a supplement to the related Prospectus or any
document incorporated therein by reference or file any other required document
that would be incorporated by reference into such Registration Statement and
Prospectus so that such Registration Statement does not contain any untrue
statement of a material fact or omit to state any material fact required to be
stated therein or necessary to make the statements therein, in light of the
circumstances under which they were made, not misleading, and such Prospectus
does not contain any untrue statement of a material fact or omit to state any
material fact required to be stated therein or necessary to make the statements
therein, in the light of the circumstances under which they were made, not
misleading (it being understood that the Company may rely on information
provided by each Notice Holder with respect to such Notice Holder), as
thereafter delivered to the purchasers of the Registrable

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Securities being sold thereunder, and, in the case of a post-effective amendment
to a Registration Statement, subject to the next sentence, use its reasonable
efforts to cause it to be declared effective as promptly as is practicable, and
(ii) give notice to the Notice Holders and the Special Counsel that the
availability of the Shelf Registration Statement is suspended (a "Deferral
Notice") and, upon receipt of any Deferral Notice, each Notice Holder agrees not
to sell any Registrable Securities pursuant to the Registration Statement until
such Notice Holder's receipt of copies of the supplemented or amended Prospectus
provided for in clause (i) above, or until it is advised in writing by the
Company that the Prospectus may be used, and has received copies of any
additional or supplemental filings that are incorporated or deemed incorporated
by reference in such Prospectus. The Company will use all reasonable efforts to
ensure that the use of the Prospectus may be resumed (x) in the case of clause
(A) above, as promptly as is practicable, (y) in the case of clause (B) above,
as soon as, in the reasonable judgment of the Company, neither the Registration
Statement nor the Prospectus contains any untrue statement of a material fact or
omits to state any material fact required to be stated therein or necessary to
make the statements therein, in the light of the circumstances under which they
were made, not misleading, and (z) in the case of clause (C) above, as soon as,
in the discretion of the Company, such suspension is no longer appropriate. The
Company shall be entitled to exercise its right under this Section 3(i) to
suspend the availability of the Shelf Registration Statement or any Prospectus,
without incurring or accruing any obligation to pay liquidated damages pursuant
to Section 2(e), no more than one (1) time in any three month period or four (4)
times in any twelve month period, and any such period during which the
availability of the Registration Statement and any Prospectus is suspended (the
"Deferral Period") shall, without incurring any obligation to pay liquidated
damages pursuant to Section 2(e), not exceed 30 days; provided, that in the case
of a Material Event relating to an acquisition or a probable acquisition or
financing, recapitalization, business combination or other similar transaction,
the Company may, without incurring any obligation to pay liquidated damages
pursuant to Section 2(e), deliver to Notice Holders a second notice to the
effect set forth above, which shall have the effect of extending the Deferral
Period by up to an additional 30 days, or such shorter period of time as is
specified in such second notice, provided, that the aggregate duration of any
Deferral Periods shall not, without incurring any obligation to pay liquidated
damages pursuant to Section 2(e), exceed 30 days in any three month period (or
60 days in any three month period in the event of a Material Event pursuant to
which the Company has delivered a second notice as required above) or 90 days in
any twelve (12) month period.

     (j)  If reasonably requested in writing in connection with a disposition of
Registrable Securities pursuant to a Registration Statement, make reasonably
available for inspection during normal business hours by a representative for
the Notice Holders of such Registrable Securities, and any broker-dealers,
attorneys and accountants retained by such Notice Holders, all relevant
financial and other records and pertinent corporate documents and properties of
the Company and its subsidiaries, and cause the appropriate officers, directors
and employees of the Company and its subsidiaries to make reasonably available
for inspection during normal business hours on reasonable notice all relevant
information reasonably requested by such representative for the Notice Holders,
or any such broker-dealers, attorneys or accountants in connection with such
disposition, in each case as is customary for similar "due diligence"
examinations; provided, however, that such persons shall first agree in writing
with the Company that any information

                                       11
<PAGE>

that is reasonably and in good faith designated by the Company in writing as
confidential at the time of delivery of such information shall be kept
confidential by such persons and shall be used solely for the purposes of
exercising rights under this Agreement, unless (i) disclosure of such
information is required by court or administrative order or is necessary to
respond to inquiries of regulatory authorities, (ii) disclosure of such
information is required by law (including any disclosure requirements pursuant
to federal securities laws in connection with the filing of any Registration
Statement or the use of any Prospectus referred to in this Agreement), (iii)
such information becomes generally available to the public other than as a
result of a disclosure or failure to safeguard by any such person or (iv) such
information becomes available to any such person from a source other than the
Company and such source is not bound by a confidentiality agreement, and
provided, that the foregoing inspection and information gathering shall, to the
greatest extent possible, be coordinated on behalf of all the Notice Holders and
the other parties entitled thereto by the counsel referred to in Section 5.

     (k)  Use all reasonable efforts to comply with all applicable rules and
regulations of the SEC and, as soon as practicable will make generally available
to its securityholders earning statements (which need not be audited) satisfying
the provisions of Section 11(a) of the Securities Act and Rule 158 thereunder
(or any similar rule promulgated under the Securities Act).

     (l)  Cooperate with each Notice Holder to facilitate the timely
preparation and delivery of certificates representing Registrable Securities
sold pursuant to a Registration Statement, which certificates shall not bear any
restrictive legends, and cause such Registrable Securities to be in such
denominations as are permitted by the Indenture and registered in such names as
such Notice Holder may request in writing at least two (2) Business Days prior
to any sale of such Registrable Securities.

     (m)  Provide a CUSIP number for all Registrable Securities covered by
each Registration Statement not later than the effective date of such
Registration Statement and provide the Trustee and the transfer agent for the
Common Stock with printed certificates for the Registrable Securities that are
in a form eligible for deposit with The Depository Trust Company.

     (n)  Cooperate and assist in any filings required to be made with the
National Association of Securities Dealers, Inc.

     (o)  Upon (i) the filing of the Initial Registration Statement and (ii)
the effectiveness of the Initial Registration Statement, announce the same, in
each case by release to Reuters Economic Services and Bloomberg Business News.

     Section 4.  Holder's Obligations.  Each Holder agrees, by acquisition of
the Registrable Securities, that no Holder of Registrable Securities shall be
entitled to sell any of such Registrable Securities pursuant to a Registration
Statement or to receive a Prospectus relating thereto, unless such Holder has
furnished the Company with a Notice and Questionnaire as required pursuant to
Section 2(d) hereof (including the information required to be included in such
Notice and Questionnaire) and the information set forth in the next sentence.
Each Notice

                                       12
<PAGE>

Holder agrees promptly to furnish to the Company all information required to be
disclosed in order to make the information previously furnished to the Company
by such Notice Holder not misleading and any other information regarding such
Notice Holder and the distribution of such Registrable Securities as the Company
may from time to time reasonably request. Any sale of any Registrable Securities
by any Holder shall constitute a representation and warranty by such Holder that
the information relating to such Holder and its plan of distribution is as set
forth in the Prospectus delivered by such Holder in connection with such
disposition, that such Prospectus does not as of the time of such sale contain
any untrue statement of a material fact relating to or provided by such Holder
or its plan of distribution and that such Prospectus does not as of the time of
such sale omit to state any material fact relating to or provided by such Holder
or its plan of distribution necessary to make the statements in such Prospectus,
in the light of the circumstances under which they were made, not misleading.

     Section 5.  Registration Expenses.  The Company shall bear all fees and
expenses incurred in connection with the performance by the Company of its
obligations under Sections 2 and 3 of this Agreement whether or not any of the
Registration Statements are declared effective. Such fees and expenses
("Registration Expenses") shall include, without limitation, (i) all
registration and filing fees (including, without limitation, fees and expenses
(x) with respect to filings required to be made with the National Association of
Securities Dealers, Inc. and (y) of compliance with federal and state securities
or Blue Sky laws (including, without limitation, filing fees and the reasonable
fees and disbursements of counsel for the Initial Purchasers in connection with
such qualification and in connection with the Blue Sky or legal investment
memorandum),  (ii) printing expenses (including, without limitation, expenses of
printing certificates for Registrable Securities in a form eligible for deposit
with The Depository Trust Company), (iii) duplication expenses relating to
copies of any Registration Statement or Prospectus delivered to any Holders
hereunder, (iv) reasonable fees and disbursements of counsel for the Company and
the Special Counsel in connection with the Shelf Registration Statement
(provided that the Company shall not be liable for the fees and expenses of more
than one separate firm for all parties participating in any transaction
hereunder), (v) reasonable fees and disbursements of the Trustee and its counsel
and of the registrar and transfer agent for the Common Stock and (vi) Securities
Act liability insurance obtained by the Company in its sole discretion. In
addition, the Company shall pay the internal expenses of the Company (including,
without limitation, all salaries and expenses of officers and employees
performing legal or accounting duties), the expense of any annual audit, the
fees and expenses incurred in connection with the listing by the Company of the
Registrable Securities on any securities exchange on which similar securities of
the Company are then listed and the fees and expenses of any person, including
special experts, retained by the Company. Notwithstanding the provisions of this
Section 5, each seller of Registrable Securities shall pay selling expenses
(including any brokerage fees and expenses or underwriting discounts and
commissions, if any) and all registration expenses to the extent required by
applicable law, and the Notice Holders shall pay the expenses of all broker-
dealers, attorneys and accountants retained by them and referred to in Section
3(j).

     Section 6.  Indemnification.

                                       13
<PAGE>

     (a)  Indemnification by the Company. The Company shall indemnify and hold
harmless each Notice Holder and each person, if any, who controls any Notice
Holder (within the meaning of either Section 15 of the Securities Act or Section
20 of the Exchange Act) from and against any losses, liabilities, claims,
damages and expenses (including, without limitation, any legal or other expenses
reasonably incurred in connection with defending or investigating any such
action or claim) (collectively, "Losses"), arising out of or based upon any
untrue statement or alleged untrue statement of a material fact contained in any
Registration Statement or Prospectus or in any amendment or supplement thereto
or in any preliminary prospectus, or arising out of or based upon any omission
or alleged omission to state therein a material fact required to be stated
therein or necessary to make the statements therein, in light of the
circumstances under which they were made, not misleading, provided, however,
that the Company shall not be liable in any such case to the extent that any
such Losses arise out of or are based upon an untrue statement or alleged untrue
statement contained in or omission or alleged omission from any of such
documents in reliance upon and conformity with any of the information relating
to the Holders furnished to the Company in writing by a Holder expressly for use
therein; provided further, that the indemnification contained in this paragraph
shall not inure to the benefit of any Holder of Registrable Securities (or to
the benefit of any person controlling such Holder) on account of any such Losses
arising out of or based upon an untrue statement or alleged untrue statement or
omission or alleged omission made in any preliminary prospectus provided in each
case the Company has performed its obligations under Section 3(a) hereof if
either (A) (i) such Holder failed to send or deliver a copy of the Prospectus
with or prior to the delivery of written confirmation of the sale by such Holder
to the person asserting the claim from which such Losses arise and (ii) the
Prospectus would have corrected such untrue statement or alleged untrue
statement or such omission or alleged omission, or (B) (x) such untrue statement
or alleged untrue statement, omission or alleged omission is corrected in an
amendment or supplement to the Prospectus and (y) having previously been
furnished by or on behalf of the Company with copies of the Prospectus as so
amended or supplemented, such Holder thereafter fails to deliver such Prospectus
as so amended or supplemented, with or prior to the delivery of written
confirmation of the sale of a Registrable Security to the person asserting the
claim from which such Losses arise.

     (b)  Indemnification by Holders of Registrable Securities. Each Holder
agrees severally and not jointly to indemnify and hold harmless the Company and
its respective directors and officers, and each person, if any, who controls the
Company (within the meaning of either Section 15 of the Securities Act or
Section 20 of the Exchange Act) or any other Holder, from and against all Losses
arising out of or based upon any untrue statement or alleged untrue statement of
a material fact contained in any Registration Statement or Prospectus or in any
amendment or supplement thereto or in any preliminary prospectus, or arising out
of or based upon any omission or alleged omission to state therein a material
fact required to be stated therein or necessary to make the statements therein
not misleading, to the extent, but only to the extent, that such untrue
statement or alleged untrue statement or omission or alleged omission was made
in reliance upon and in conformity with information furnished to the Company in
writing by such Holder expressly for use in such Registration Statement or
Prospectus or amendment or supplement thereto. In no event shall the liability
of any selling Holder of Registrable Securities hereunder be greater in amount
than the dollar amount of the proceeds

                                       14
<PAGE>

received by such Holder upon the sale of the Registrable Securities pursuant to
the Registration Statement giving rise to such indemnification obligation.

     (c)  Conduct of Indemnification Proceedings. In case any proceeding
(including any governmental investigation) shall be instituted involving any
person in respect of which indemnity may be sought pursuant to either of the two
preceding paragraphs, such person (the "Indemnified Party") shall promptly
notify the person against whom such indemnity may be sought (the "Indemnifying
Party") in writing and the indemnifying party, upon request of the indemnified
party, shall retain counsel reasonably satisfactory to the indemnified party to
represent the indemnified party and any other parties entitled to
indemnification hereunder which the indemnifying party may designate in such
proceeding and shall pay the reasonable fees and disbursements of such counsel
related to such proceeding. In any such proceeding, any indemnified party shall
have the right to retain its own counsel, but the fees and expenses of such
counsel shall be at the expense of such indemnified party unless (i) the
indemnifying party and the indemnified party shall have mutually agreed to the
retention of such counsel or (ii) the named parties to any such proceeding
(including any impleaded parties) include both the indemnifying party and the
indemnified party and representation of both parties by the same counsel would
be inappropriate due to actual or potential differing interests between them. It
is understood that the indemnifying party shall not, in respect of the legal
expenses of any indemnified party in connection with any proceeding or related
proceedings in the same jurisdiction, be liable for the fees and expenses of
more than one separate firm (in addition to any local counsel) for all
indemnified parties, and that all such fees and expenses shall be reimbursed as
they are incurred. Such separate firm shall be designated in writing by, in the
case of parties indemnified pursuant to Section 6(a), the Holders of a majority
(with Holders of Notes deemed to be the Holders, for purposes of determining
such majority, of the number of shares of Underlying Common Stock into which
such Notes are or would be convertible or exchangeable as of the date on which
such designation is made) of the Registrable Securities covered by the
Registration Statement that are held by Holders that are indemnified parties
pursuant to Section 6(a) and, in the case of parties indemnified pursuant to
Section 6(b), the Company. The indemnifying party shall not be liable for any
settlement of any proceeding effected without its written consent, but if
settled with such consent or if there be a final judgment for the plaintiff, the
indemnifying party agrees to indemnify the indemnified party from and against
any loss or liability by reason of such settlement or judgment. No indemnifying
party shall, without the prior written consent of the indemnified party, effect
any settlement of any pending or threatened proceeding in respect of which any
indemnified party is or could have been a party and indemnity could have been
sought hereunder by such indemnified party, unless such settlement includes an
unconditional release of such indemnified party from all liability on claims
that are the subject matter of such proceeding.

     (d)  Contribution.  To the extent that the indemnification provided for
in this Section 6 is unavailable to an indemnified party under Section 6(a) or
6(b) hereof in respect of any Losses or is insufficient to hold such indemnified
party harmless, then each applicable indemnifying party, in lieu of indemnifying
such indemnified party, shall contribute to the amount paid or payable by such
indemnified party as a result of such Losses in such proportion as is
appropriate to reflect the relative fault of the indemnifying party or parties
on the one hand and of the indemnified party or parties on the other hand in
connection with the statements or omissions

                                       15
<PAGE>

that resulted in such Losses, as well as any other relevant equitable
considerations. The relative fault of the Holders on the one hand and the
Company on the other hand shall be determined by reference to, among other
things, whether the untrue or alleged untrue statement of a material fact or the
omission or alleged omission to state a material fact relates to information
supplied by the Holders or by the Company, and the parties' relative intent,
knowledge, access to information and opportunity to correct or prevent such
statement or omission. The Holders' respective obligations to contribute
pursuant to this paragraph are several in proportion to the respective number of
Registrable Securities they have sold pursuant to a Registration Statement, and
not joint.

     The parties hereto agree that it would not be just and equitable if
contribution pursuant to this Section 6(d) were determined by pro rata
allocation or by any other method or allocation that does not take into account
the equitable considerations referred to in the immediately preceding paragraph.
The amount paid or payable by an indemnified party as a result of the Losses
referred to in the immediately preceding paragraph shall be deemed to include,
subject to the limitations set forth above, any legal or other expenses
reasonably incurred by such indemnified party in connection with investigating
or defending any such action or claim. Notwithstanding this Section 6(d), an
indemnifying party that is a selling Holder of Registrable Securities shall not
be required to contribute any amount in excess of the amount by which the total
price at which the Registrable Securities sold by such indemnifying party and
distributed to the public were offered to the public exceeds the amount of any
damages that such indemnifying party has otherwise been required to pay by
reason of such untrue or alleged untrue statement or omission or alleged
omission. No person guilty of fraudulent misrepresentation (within the meaning
of Section 11(f) of the Securities Act) shall be entitled to contribution from
any person who was not guilty of such fraudulent misrepresentation.

     (e)  The indemnity, contribution and expense reimbursement obligations of
the parties hereunder shall be in addition to any liability any indemnified
party may otherwise have hereunder, under the Purchase Agreement or otherwise.

     (f)  The indemnity and contribution provisions contained in this Section
6 shall remain operative and in full force and effect regardless of (i) any
termination of this Agreement, (ii) any investigation made by or on behalf of
any Holder or any person controlling any Holder, or the Company, or the
Company's officers or directors or any person controlling the Company and (iii)
the sale of any Registrable Securities by any Holder.

     Section 7.  Information Requirements.  (a) The Company covenants that, if
at any time before the end of the Effectiveness Period the Company is not
subject to the reporting requirements of the Exchange Act, it will cooperate
with any Holder of Registrable Securities and take such further reasonable
action as any Holder of Registrable Securities may reasonably request in writing
(including, without limitation, making such reasonable representations as any
such Holder may reasonably request), all to the extent required from time to
time to enable such Holder to sell Registrable Securities without registration
under the Securities Act within the limitation of the exemptions provided by
Rule 144 and Rule 144A under the Securities Act and customarily taken in
connection with sales pursuant to such exemptions. Upon the written

                                       16
<PAGE>

request of any Holder of Registrable Securities, the Company shall deliver to
such Holder a written statement as to whether it has complied with such filing
requirements, unless such a statement has been included in the Company's most
recent report filed pursuant to Section 13 or Section 15(d) of Exchange Act.
Notwithstanding the foregoing, nothing in this Section 7 shall be deemed to
require the Company to register any of its securities (other than the Common
Stock) under any section of the Exchange Act.

     (b)  The Company shall file the reports required to be filed by it under
the Exchange Act and shall comply with all other requirements set forth in the
instructions to Form S-3 in order to allow the Company to be eligible to file
registration statements on Form S-3.

     Section 8.  Miscellaneous.

     (a) No Conflicting Agreements. The Company is not, as of the date hereof, a
party to, nor shall it, on or after the date of this Agreement, enter into, any
agreement with respect to its securities that conflicts with the rights granted
to the Holders of Registrable Securities in this Agreement. The Company
represents and warrants that the rights granted to the Holders of Registrable
Securities hereunder do not in any way conflict with the rights granted to the
holders of the Company's securities under any other agreements. Notwithstanding
the foregoing, the Initial Purchasers acknowledge that the Company is obligated,
and may obligate itself from time to time in the future, to register its
securities for other holders pursuant to separate registration statements.

     (b) Amendments and Waivers. The provisions of this Agreement, including the
provisions of this sentence, may not be amended, modified or supplemented, and
waivers or consents to departures from the provisions hereof may not be given,
unless the Company has obtained the written consent of Holders of a majority of
the then outstanding Underlying Common Stock constituting Registrable Securities
(with Holders of Notes deemed to be the Holders, for purposes of this Section,
of the number of outstanding shares of Underlying Common Stock into which such
Notes are or would be convertible or exchangeable as of the date on which such
consent is requested). Notwithstanding the foregoing, a waiver or consent to
depart from the provisions hereof with respect to a matter that relates
exclusively to the rights of Holders of Registrable Securities whose securities
are being sold pursuant to a Registration Statement and that does not directly
or indirectly affect the rights of other Holders of Registrable Securities may
be given by Holders of at least a majority of the Registrable Securities being
sold by such Holders pursuant to such Registration Statement; provided, that the
provisions of this sentence may not be amended, modified, or supplemented except
in accordance with the provisions of the immediately preceding sentence. Each
Holder of Registrable Securities outstanding at the time of any such amendment,
modification, supplement, waiver or consent or thereafter shall be bound by any
such amendment, modification, supplement, waiver or consent effected pursuant to
this Section 8(b), whether or not any notice, writing or marking indicating such
amendment, modification, supplement, waiver or consent appears on the
Registrable Securities or is delivered to such Holder.

                                       17
<PAGE>

     (c)  Notices. All notices and other communications provided for or
permitted hereunder shall be made in writing by hand delivery, by telecopier, by
courier guaranteeing overnight delivery or by first-class mail, return receipt
requested, and shall be deemed given (i) when made, if made by hand delivery,
(ii) upon confirmation, if made by telecopier, (iii) one (1) Business Day after
being deposited with such courier, if made by overnight courier or (iv) on the
date indicated on the notice of receipt, if made by first-class mail, to the
parties as follows:

     (w)  if to a Holder of Registrable Securities, at the most current address
given by such Holder to the Company in a Notice and Questionnaire or any
amendment thereto;

     (x)  if to the Company, to:

          LTX Corporation
          LTX Park
          University Avenue
          Westwood, Massachusetts 02090
          Attention:  Chief Financial Officer
          Telecopy No.: (781) 466-0993

          and

          Bingham Dana LLP
          Attention:  Michael P. O'Brien
          150 Federal Street
          Boston, Massachusetts 02110
          Telecopy No.: (617) 951-8736

     (y)  if to the Initial Purchasers, to:

          Morgan Stanley & Co. Incorporated
          1585 Broadway
          New York, New York 10019
          Attention:  Equity Capital Markets
          Telecopy No.: (212) 761-0538

          and

          Testa, Hurwitz & Thibeault, LLP
          125 High Street
          Boston, Massachusetts 02110
          Attention:  Gordon H. Hayes, Jr.
          Telecopy No.:  (617) 248-7100

or to such other address as such person may have furnished to the other persons
identified in this Section 8(c) in writing in accordance herewith.

                                       18
<PAGE>

     (d)  Approval of Holders. Whenever the consent or approval of Holders of a
specified percentage of Registrable Securities is required hereunder,
Registrable Securities held by the Company or its affiliates (as such term is
defined in Rule 405 under the Securities Act) (other than the Initial Purchasers
or subsequent Holders of Registrable Securities if such subsequent Holders are
deemed to be such affiliates solely by reason of their holdings of such
Registrable Securities) shall not be counted in determining whether such consent
or approval was given by the Holders of such required percentage.

     (e)  Successors and Assigns. Any person who purchases any Registrable
Securities from the Initial Purchasers shall be deemed, for purposes of this
Agreement, to be an assignee of the Initial Purchasers. This Agreement shall
inure to the benefit of and be binding upon the successors and assigns of each
of the parties and shall inure to the benefit of and be binding upon each Holder
of any Registrable Securities.

     (f)  Counterparts. This Agreement may be executed in any number of
counterparts and by the parties hereto in separate counterparts, each of which
when so executed shall be deemed to be original and all of which taken together
shall constitute one and the same agreement.

     (g)  Headings. The headings in this Agreement are for convenience of
reference only and shall not limit or otherwise affect the meaning hereof.

     (h)  Governing Law. THIS AGREEMENT SHALL BE GOVERNED BY AND CONSTRUED IN
ACCORDANCE WITH THE LAWS OF THE STATE OF NEW YORK, WITHOUT REGARD TO CONFLICTS
OF LAWS PRINCIPLES THEREOF.

     (i)  Severability. If any term, provision, covenant or restriction of this
Agreement is held to be invalid, illegal, void or unenforceable, the remainder
of the terms, provisions, covenants and restrictions set forth herein shall
remain in full force and effect and shall in no way be affected, impaired or
invalidated thereby, and the parties hereto shall use their best efforts to find
and employ an alternative means to achieve the same or substantially the same
result as that contemplated by such term, provision, covenant or restriction, it
being intended that all of the rights and privileges of the parties shall be
enforceable to the fullest extent permitted by law.

     (j)  Entire Agreement. This Agreement is intended by the parties as a final
expression of their agreement and is intended to be a complete and exclusive
statement of the agreement and understanding of the parties hereto in respect of
the subject matter contained herein and the registration rights granted by the
Company with respect to the Registrable Securities. Except as provided in the
Purchase Agreement, there are no restrictions, promises, warranties or
undertakings, other than those set forth or referred to herein, with respect to
the registration rights granted by the Company with respect to the Registrable
Securities. This Agreement supersedes all prior agreements and undertakings
among the parties with respect to such registration rights. No party hereto
shall have any rights, duties or obligations other than those specifically set
forth in this Agreement. In no event will such methods of distribution take the

                                       19
<PAGE>

form of an underwritten offering of the Registrable Securities without the prior
agreement of the Company.

     (k)  Termination. This Agreement and the obligations of the parties
hereunder shall terminate upon the end of the Effectiveness Period, except for
any liabilities or obligations under Section 4, 5 or 6 hereof and the
obligations to make payments of and provide for liquidated damages under Section
2(e) hereof to the extent such damages accrue prior to the end of the
Effectiveness Period, each of which shall remain in effect in accordance with
its terms.

                 [REMAINDER OF PAGE INTENTIONALLY LEFT BLANK.]

                                       20
<PAGE>

     IN WITNESS WHEREOF, the parties have executed this Agreement as of the date
first written above.

                         LTX CORPORATION



                         By:________________________________
                            Name:
                            Title:


     The foregoing Registration Rights Agreement is hereby confirmed and
accepted by the Initial Purchasers as of the date hereof:

MORGAN STANLEY & CO. INCORPORATED
DEUTSCHE BANC ALEX. BROWN
NEEDHAM & COMPANY, INC.

By:  MORGAN STANLEY & CO. INCORPORATED


By:______________________________________
   Authorized Signatory

                                       21
<PAGE>

                                                                       EXHIBIT A
                                                                       ---------

               Initial Purchasers
               ------------------

Morgan Stanley & Co. Incorporated
Deutsche Banc Alex. Brown
Needham & Company, Inc.