Optoway

GBB-7810G

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Tel: 886-3-5979798

Fax: 886-3-5979737

E-mail: sales@optoway.com.tw

http: // www.optoway.com.tw

12/1/2005 V2.0

3

PIN ASSIGNMENT

PIN

Signal Name

Sequence

Description

1

RX-LOS

2

Receiver Loss of Signal, logic high, open collector compatible,

2

2

Receiver Ground

3

2

Receiver Ground

4

MOD-DEF(0)

2

TTL Low

5

MOD-DEF(1)

2

SCL Serial Clock Signal

6

MOD-DEF(2)

2

SDA Serial Data Signal

7

TX-DIABLE

2

Transmitter Disable, logic high, open collector compatible

8

2

Transmitter Ground

9

2

Transmitter Ground

10

TX-FAULT

2

Transmitter Fault, logic high, open collector compatible, 4.7K to

11

1

Receiver Ground

12

-RX-DAT

1

Receiver Data Bar, Differential PECL, AC coupled

13

+RX-DAT

1

Receiver Data, Differential PECL, AC coupled

14

1

Receiver Ground

15

2

Receiver +5V Supply

16

2

Transmitter +5V Supply

17

1

Transmitter Ground

18

+TX-DAT

1

Transmitter Data, Differential PECL, AC coupled

19

-TX-DAT

1

Transmitter Data Bar, Differential PECL, AC coupled

20

1

Transmitter Ground

A sequence value of 1 indicates that the signal is in the first group to engage during plugging of a module. A sequence value of 2

indicates that the signal is the second and last group. The two guide pins on the connector are electrically connected to the transceiver circuit

ground. These two guide pins make contact with circuit prior to sequence 1 signals.

Module Definition

Module Definition

MOD-DEF(0)

PIN 4

MOD-DEF (1)

PIN 5

MOD-DEF (2)

PIN 6

Interpretation by

Host

4

TTL Low

SCL

SDA

Serial module definition

protocol

Module Definition 4 specifies a serial definition protocol. For this definition, upon power up, MOD-DEF(1:2) appear as no connector

(NC) and MOD-DEF(0) is TTL LOW. When the host system detects this condition, it activates the serial protocol. The protocol uses the

2-wire serial CMOS E