Data Sheet

6

Pin definitions

Pin #

Logic

Symbol

Function

Plug Seq

Notes

1

GND

Module Ground; Signal Ground

1

1

2

VEE5

Optional -5.2V Power Supply

2

3

LVTTL-I

Mod_Desel

Module De-select; When held low by host allows the module to

respond to 2-wire serial interface commands

3

4

LVTTL-O

Interrupt

Interrupt_BAR; Indicates the presence of an important condition

that can be read over the two wire interface

3

2

5

LVTTL-I

TX_DIS

Transmitter Disable; Turns Off Transmitter Laser Source

3

6

VCC5

+5V Power Supply

2

7

GND

Module Ground; Signal Ground

1

1

8

VCC3

+3.3V Power Supply

2

9

VCC3

+3.3V Power Supply

2

10

LVTTL-I

SCA

Two Wire Interface Clock

3

2

11

LVTTL-I/O

SDA

Two Wire Interface Data Line

3

2

12

LVTTL-O

Mod_Abs

Indicates Module Not Present; Grounded in Module

3

2

13

LVTTL-O

Mod_NR

Module Not Ready or Indicating Module Operational Fault

3

2

14

LVTTL-O

RX_LOS

Receiver Loss of Signal Indicator

3

2

15

GND

Module Ground; Signal Ground

1

1

16

GND

Module Ground; Signal Ground

1

1

17

CML-O

RD-

Receiver Inverted Data Output

3

18

CML-O

RD+

Receiver Non-Inverted Data Output

3

19

GND

Module Ground; Signal Ground

1

1

20

VCC2

+1.8V Power Supply

2

21

LVTTL-I

P_down/RST

Power down; When high, places the module in the low power

standby mode of less than 1.5W with 2-wire interface

still operational.

Reset; The falling edge of P_Down/RST initiates a complete

module reset including the 2-wire interface.

3

22

VCC2

+1.8V Power Supply

2

23

GND

Module Ground; Signal Ground

1

1

24

PECL-I

RefCLK+

Reference Clock Non-Inverted Input, AC coupled on Host Board

3

3

25

PECL-I

RefCLK-

Reference Clock Inverted Input, AC coupled on Host Board

3

3

26

GND

Module Ground; Signal Ground

1

1

27

GND

Module Ground; Signal Ground

1

1

28

CML-I

TD-

Transmitter Inverted Data Input

3

29

CML-I

TD+

Transmitter Non-Inverted Data Input

3

30

GND

Module Ground; Signal Ground

1

1

[1] Module ground pins are isolated from the module case and chassis ground within the module.

[2] Open Collector should be pulled up with 4.7K-10Kohms to a voltage between 3.15V and 3.6V on the host board.

[3] Reference clock is required for IGF-17511J.