File E151738
Project 98SC18138
June 29, 1993
REPORTONCOMPONENT - NON-OPTICAL ISOLATING DEVICES

Linear Technology Corp.
Milpitas, California

Copyright © 1993 Underwriters Laboratories Inc.
Underwriters Laboratories Inc. authorizes the above-named company toreproduce this Report provided it is reproduced in its entirety.
Underwriters Laboratories Inc. authorizes the above-named company toreproduce that portion of this Report consisting of this Cover Page throughPage 2.

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1993-06-29
2011-01-15

D E S C R I P T I O N
PRODUCT COVERED:*USR Component – Single Protection, Isolated, R5485 Receiver/Driver,
Model LTC1535, may follow by additional suffixes.
Obsolete Product (Retained for reference only): USR Component – Single
Protection, Isolated, Self-Powered Comparator, Model LTC1531 suffixed withCSW. USR Component – Single Protection, Isolated MOSFET Driver, Model LTC1177
suffixed with CSW-5, ISW-5, CSW-12, or ISW-12.

ENGINEERING CONSIDERATIONS (NOT FOR FIELD REPRESENTATIVE'S USE):
The solid state portion of these devices is encapsulated in an epoxy
compound. Only the insulating function for the rated isolation voltage
between the input and output of the devices has been investigated.
Use - For use only in complete equipment where the acceptability of thecombination is determined by Underwriters Laboratories Inc.
Conditions of Acceptability - Each device shall be reviewed withrespect to the following conditions of acceptability:
1.

The capability of the device to control a load has not been
investigated.

2.

These devices should be installed in a suitable end product enclosure.

3.

The maximum temperature on the case should not exceed the maximum
operating temperature rating specified in the ratings table.

4.

For single protection devices, the insulation to the case has not been
evaluated. For double protection devices, the insulation to the casehas been evaluated to the isolation voltage specified in the ratings
table.

5.

In addition to meeting single protection requirements, double
protection optical isolators have also been investigated for use in up
to 250 V, 50/60 Hz circuits in audio, video, and similar equipment inapplications in which breakdown of the optical isolator may result in arisk of fire, electrical shock, or injury to persons.

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Vol. 1

Sec. 1and Report

Page 2

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1993-06-29
2006-07-26

ELECTRICAL RATINGS:

Model No.

Volts
dc

Maximum
Input Current
mA

Isolation
Voltage

Maximum
OperatingTemperature °C

LTC1177
LTC1531

125

3.4
14.0

2500 ac2500 ac8570

Isolation
Voltage
(AC)
2500

Max
Operating
Temp (°C)
85*Current (mA)

Power (mW)

Encoder28Encoder
154 @125kBdModelLTC1535

Decoder
12

Decoder
66 @125kBdCreated by UL Document Assembler 2018-07-16 07:25:19 -05:00

MaxJunction
Temp(°C)
125MaxStorage
Temp(°C)
150

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1993-06-29
2010-01-25

CONSTRUCTION DETAILS:
The product shall be constructed in accordance with the following
descriptions.

Model Differences - All LTC1177 Models are the same, except forCommercial and Industrial operating temperature ranges and lead Frame
Model LTC1531 has different devices, but the same lead frame and construction
as the LTC1177CS-12.
In the part number:"C" stands for Commercial operating temperature range.
"I" stands for Industrial operating temperature range.
"N" stands for modified, 18-lead style, plastic DIP package.
"S" stands for modified, 28-lead style, plastic wide surface mountpackage (SOL)*Connection Diagram - See ILLs. 5, and 7.

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