RoHS Compliant
1550 nm Single-mode Transceiver, 24dB margin
Small Form Pluggable (SFP), with Diagnostic Monitoring
1.0625Gbd Fiber Channel/1.25 Gigabit Ethernet

Features RoHS compliant
 Compliant with IEEE802.3z Gigabit Ethernet
Standard
 Compliant with Fiber Channel 100-SM-LL-L
standard
 Compliant with SFF8472 diagnostic monitoring
interface Duplex LC connector
 Differential LVPECL inputs and outputs
 Single power supply 3.3V
 TTL signal detect indicator Hot Pluggable Class 1 laser product complies with EN 60825-1

Ordering Information
PART NUMBER

INPUT/OUTPUT

SIGNAL DETECTVOLTAGETEMPERATURE

GD1550-SFP-LC.S80(WT) AC/AC

TTL

3.3V

-40C to 85 C

GD1550-SFP-LC.S80

AC/AC

TTL

3.3V

0C to 70 C

Range

Accuracy

Unit

Calibration

Diagnostics
Parameter
Temperature-40 to 95±3oVoltage0 to VCC± 0.1

V

Bias Current

0 to 120±5mA

TX Power-4 to +7

± 3 dBdBm

RX Power-23 to –3± 3 dBdBm

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CExternal

RoHS Compliant
1550 nm Single-mode Transceiver, 24dB margin
Small Form Pluggable (SFP), with Diagnostic Monitoring
1.0625Gbd Fiber Channel/1.25 Gigabit Ethernet
Absolute Maximum Ratings
PARAMETERSYMBOL MIN

Storage Temperature
Supply Voltage
Input Voltage
Output Current
Operating Current

MAX UNITS

40
0.5
0.5-----TS
Vcc
VIN
Io
IOP

NOTE

C

85
4.0Vcc
50400

V
V
mA
mA

MAX

UNITS

NOTE

C

GD1550-SFP-LC.S80
GD1550-SFP-LC.S80(WT)

Recommended Operating Conditions
PARAMETERSYMBOL MIN

Case Operating TemperatureTC

Supply Voltage
Supply Current

Vcc
ITX + IRX

0-40
3.1---7085
3.5300VmA

Transmitter Electro-optical Characteristics
Vcc = 3.1 V to 3.5 V, TC = 0 C to 70 C (-40 C to 85 CPARAMETER

Output Optical Power

9/125 m fiber
Extinction Ratio
Center Wavelength
Spectral Width (-20dB)
Side Mode Suppression Ratio
Rise/Fall Time, (2080%)
Relative Intensity Noise
Total Jitter
Output Eye
Max. Pout TX-DISABLE Asserted
Differential Input Voltage

SYMBOL

MIN

TYP.

MAX

Pout

0---+5ER

SMSR
T r, f
RIN
TJ

71530
--30
-------POFF
VDIFF

--0.4

C

UNITS

NOTEdBm----1550
1570--0.8------260--120--227
Compliant with IEEE802.3z--45--2.0

AveragedB
nm
nmdB
psdB/Hz
psdBm
V

Receiver Electro-optical Characteristics
Vcc = 3.1 V to 3.5 V, TC = 0 C to 70 C (-40 C to 85 C)
PARAMETERSYMBOL
MIN

TYP.

MAX

UNITS

NOTE

Optical Input Power-maximum
Optical Input Power-minimum

PIN-1------dBm

BER < 1012PIN----26

24dBm

BER < 1012Operating Center Wavelength

C

1260

---

1610

nm

Optical Return Loss

ORL12------

dBSignal Detect-AssertedPA------

24dBmSignal Detect-DeassertedPD35------dBm

Differential Output Voltage
Data Output Rise, Fall Time

VDIFF

0.5---

1.2VT r, f------

0.35

nsRX_LOSL

0---

0.5

V

RX_LOSH

2.4---VCC

VReceiver Loss of Signal Output
Receiver Loss of Signal Output

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RoHS Compliant
1550 nm Single-mode Transceiver, 24dB margin
Small Form Pluggable (SFP), with Diagnostic Monitoring
1.0625Gbd Fiber Channel/1.25 Gigabit Ethernet

Block Diagram of Transceiver

ELECTRICAL SUBASSEMBLYDATADATA/LD Driver&Fault Sense

LASER

TX_DISABLE
TX_FAULTOPTICALSUBASSEMBLIES

(0)
(1)

MOD_DEF

DUPLEX SC
RECEPTACLE

(2)

DATA
DATA/

POST-Amp&LOS Detect

RREAMPLIFIERIC

RX_LOS

Photo
Diode

TOP VIEW (Label side)

Transmitter Section
The transmitter section consists of a 1550 nm InGaAsP laser in an eye safe optical subassembly (OSA) which mates to the fiber
cable. The laser OSA is driven by a LD driver IC which converts differential input LVPECL logic signals into an analog laserdriving current.
TX_DISABLE
The TX_DISABLE signal is high (TTL logic “1”) to turn off the laser output. The laser will turn on when TX_DISABLE is low(TTL logic “0”).
Receiver Section
The receiver utilizes an InGaAs PIN photodiode mounted together with a trans-impedance preamplifier IC in an OSA. This OSA
is connected to a circuit providing post-amplification quantization, and optical signal detection.
Receive Loss (RX_LOS)The RX_LOS is high (logic “1”) when there is no incoming light from the companion transceiver. This signal is normally used bythe system for the diagnostic purpose. The signal is operated in LVTTL level.

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RoHS Compliant
1550 nm Single-mode Transceiver, 24dB margin
Small Form Pluggable (SFP), with Diagnostic Monitoring
1.0625Gbd Fiber Channel/1.25 Gigabit Ethernet

Dimensions

DIMENSIONS ARE IN MILLIMETERSALL DIMENSIONS ARE 0.2mm UNLESS OTHERWISE SPECIFIED
Unit: mm

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RoHS Compliant
1550 nm Single-mode Transceiver, 24dB margin
Small Form Pluggable (SFP), with Diagnostic Monitoring1.0625Gbd Fiber Channel/1.25 Gigabit Ethernet

SFP host board mechanical layout

XYS XYA1

LX A S1PIN1

LX A SLEGEND
AS BS

1. PADS AND VIAS ARE CHASSIS GROUND
2. THROUGH HOLES, PLATING OPTIONAL
3. HATCHED AREA DENOTES COMPONENTAND TRACE KEEPOUT(EXCEPT CHASSISGROUND)
4.AREA DENOTES COMPONENT KEEPOUT(TRACES ALLOWED)DIMENSIONS ARE IN MILLIMETERSPIN1A S BS

AS BS

Unit: mmPage 5 of 7
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RoHS Compliant
1550 nm Single-mode Transceiver, 24dB margin
Small Form Pluggable (SFP), with Diagnostic Monitoring
1.0625Gbd Fiber Channel/1.25 Gigabit Ethernet

Assembly drawing

1.7±0.9
3.5±0.3
41.73±0.5
PCB11.0 REF.

15.25±0.1

9.8 MAX0.4±0.1 BELOW PCBCAGE ASSEMBLY

16.25±0.1
MSA-SPECIFIED BEZELPCBDIMENSIONS ARE IN MILLIMETERS

Unit: mm

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10.4±0.1

15.0 MAX

BEZELRoHS Compliant
1550 nm Single-mode Transceiver, 24dB margin
Small Form Pluggable (SFP), with Diagnostic Monitoring
1.0625Gbd Fiber Channel/1.25 Gigabit Ethernet
Pin Assignment
Pin-OutPin

PIN 11

PIN 20

PIN 10

PIN 1Signal Name

Description

1

TGND

Transmit Ground2

TX_FAULTTransmit Fault

3

TX_DISABLE

Transmit Disable

4

MOD_DEF (2)SDA Serial Data Signal

5

MOD_DEF (1)SCL Serial Clock Signal

6

MOD_DEF (0)TTL Low

7

RATE SELECTOpen Circuit

8

Receiver Loss of Signal, TTL High, open collector

9

RX_LOS
RGND

10

RGND

Receiver Ground

Receiver Ground

11

RGND

Receiver Ground

12RX

Receive Data Bar, Differential PECL, ac coupled

1314RXRGNDReceive Data, Differential PECL, ac coupled

15

VCCR

Receiver Power Supply

16VCCT

Transmitter Power Supply

17TGND

Transmitter Ground

18TX

Transmit Data, Differential PCEL, ac coupled

19TX
TGND

Transmit Data Bar, Differential PCEL, ac coupled

20

Receiver Ground

Transmitter Ground

Eye Safety MarkGD155-SFP-LC.S80 series singlemode transceiver is aclass 1 laser product. It complies with EN 60825-1 andFDA 21 CFR 1040.10 and 1040.11. In order to meetlaser safety requirements the transceiver shall beoperated within theAbsolute Maximum Ratings.

Required MarkClass 1 Laser ProductComplies with
21 CFR 1040.10 and 1040.11

CautionAll adjustments have been done at the factory before
the shipment of the devices. No maintenance and user
serviceable part is required. Tampering with andmodifying the performance of the device will result in
voided product warranty.
Note : All information contained in this document is subject to change without notice.

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