Oplink Communications, Inc

4

TXD3XGHL2xx

S0321. Rev.04. (web) 2014-03-21

Module Pin Description

Pin

Logic

Symbol

Description

1

-

GND

Module Ground

2

-

V

Optional -5.2V Power Supply (Not Required)

3

LVTTL-I

Mod_DeSel

Module De-select; When held low allows module to respond to 2-wire serial interface

4

LVTTL-O

Interrupt

Interrupt; Indicates presence of an important condition which can be read over the 2-wire serial

Interface

5

LVTTL-I

TX_Dis

Transmitter Disable; Turns off transmitter laser output

6

-

V

+5V Power Supply

7

-

GND

Module Ground

8

-

V

+3.3V Power Supply

9

-

V

+3.3V Power Supply

10

LVTTL-I/O

SCL

2-Wire Serial Interface Clock

11

LVTTL-I/O

SDA

2-Wire Serial Interface Data Line

12

LVTTL-O

Mod_Abs

Indicates Module is not present. Grounded in the Module

13

LVTTL-O

Mod_NR

Module Not Ready; Indicating Module Operational Fault

14

LVTTL-O

RX_LOS

Receiver Loss Of Signal Indicator

15

-

GND

Module Ground

16

-

GND

Module Ground

17

CML-O

RD-

Receiver Inverted Data Output

18

CML-O

RD+

Receiver Non-Inverted Data Output

19

-

GND

Module Ground

20

-

V

Not Used

21

LVTTL-I

P_Down/RST

Power down; When high, requires the module to limit power consumption to 1.5W or below. 2-Wire

serial interface must be functional in the low power mode.

Reset; The falling edge initiates a complete reset of the module including the 2-wire serial interface,

equivalent to a power cycle.

22

-

V

Not Used

23

-

GND

Module Ground

24

PECL-I

RefCLK+

Reference Clock Non-Inverted Input (Not Required)

25

PECL-I

RefCLK-

Reference Clock Inverted Input (Not Required)

26

-

GND

Module Ground

27

-

GND

Module Ground

28

CML-I

TD-

Transmitter Inverted Data Input

29

CML-I

TD+

Transmitter Non-Inverted Data Input

30

-

GND

Module Ground

Data Rate Selection

Rate Select Setting

A0H byte 60 bit 0

Rate

1

8.5Gb/s

0

9.95Gb/s to 11.09Gb/s

Factory default setting = 0; can be customized upon request.

The transceivers support data rates 8.5Gb/s and 9.95-11.09Gb/s. The data rate selection between 8.5Gb/s and 9.95-11.09Gb/s can be set by A0H

byte 60 bit 0.