Table 1. Electrical Pin Definitions

Pin

Name

Logic

Function/Description

Notes

1

GND

ModuleGround

1

2

-5.2Vpowersupply.(NotUsed)

3

Mod-Desel

LVTTL-I

ModuleDe-select;Whenheldlowallowsthemoduletorespondto2-wireSe-

rialinterfacecommands

4

4

Interrupt

LVTTL-O

Interrupt;Indicatespresenceofanimportantconditionwhichcanbereadover

theserial2-wireinterface

2

5

TX_DIS

LVTTL-I

TransmitterDisable;TransmitterLaserSourceTurnedOff

4

6

5Vpowersupply.(NotUsed)

7

GND

ModuleGround

1

8

+3.3VPowerSupply

9

+3.3VPowerSupply

10

SCL

LVTTL-I

TwoWireInterfaceClock

2

11

SDA

LVTTL-I/O

TwoWireInterfaceDataLine

2

12

Mod_Abs

LVTTL-O

LVTTL-OMod_AbsIndicatesModuleisnotpresent.GroundedintheModule

2

13

Mod_NR

LVTTL-O

ModuleNotReady;IndicatingModuleOperationalFault

2

14

RX_LOS

LVTTL-O

ReceiverLossOfSignalIndicator

2

15

GND

ModuleGround

1

16

GND

ModuleGround

1

17

RD-

CML-O

ReceiverInvertedDataOutput

18

RD+

CML-O

ReceiverNon-InvertedDataOutput

19

GND

ModuleGround

1

20

+1.8VPowerSupply.(NotUsed)

21

P_Down/RST LVTTL-I

Powerdown:Whenhigh,themoduleisputintoalowerpowermode.Serial

interfaceisfunctionalinthelowpowermode.Reset:Thefallingedgeinitiates

acompleteresetofthemoduleincludingtheserialInterface,equivalenttoa

powercycle.

4

22

+1.8VPowerSupply.(NotUsed)

23

GND

ModuleGround

1

24

RefCLK+

PECL-I

ReferenceClockNon-InvertedInput,ACcoupledonthehostboard(NotUsed)

3

25

RefCLK-

PECL-I

ReferenceClockInvertedInput,ACcoupledonthehostboard(NotUsed)

3

26

GND

ModuleGround

1

27

GND

ModuleGround

1

28

TD-

CML-I

TransmitterInvertedDataInput

29

TD+

CML-I

TransmitterNon-InvertedDataInput

30

GND

ModuleGround

1

Notes:

1. ModulegroundpinsGndareisolatedfromthemodulecaseandchassisgroundwithinthemodule.

2. OpenCollectorshouldbepulledupwith4.7KWto10KWtoavoltagebetween3.15Vand3.6Vonthehostboard.

3. RefCLK+/-areinternallyterminated(50W)

4. PulleduptoVcc3via4.7-10KWresistorinsidethemodule