SPL-34-GB-BD-xDFM

SPL-43-GB-BD-xDFM

DS-6660 Rev 02 2013-8-26

1. TX Fault is an open collector output, which should be pulled up with a 4.7k~10k

Ω resistor on the host board to

a voltage between 2.0V and Vcc+0.3V. Logic 0 indicates normal operation; logic 1 indicates a laser fault of

some kind. In the low state, the output will be pulled to less than 0.8V.

2. TX Disable is an input that is used to shut down the transmitter optical output. It is pulled up within the module

with a 4.7k~10k

Ω resistor. Its states are:

Low (0~0.8V):

Transmitter on

(>0.8V, <2.0V):

Undefined

High (2.0~3.465V):

Transmitter Disabled

Open:

Transmitter Disabled

3. MOD-DEF 0,1,2 are the module definition pins. They should be pulled up with a 4.7k~10k

Ω resistor on the host

board. The pull-up voltage shall be VccT or VccR.

MOD-DEF 0 is grounded by the module to indicate that the module is present

MOD-DEF 1 is the clock line of two wires serial interface for serial ID

MOD-DEF 2 is the data line of two wires serial interface for serial ID

4. LOS is an open collector output, which should be pulled up with a 4.7k~10k

Ω resistor on the host board to a

voltage between 2.0V and Vcc+0.3V. Logic 0 indicates normal operation; logic 1 indicates loss of signal. In the

low state, the output will be pulled to less than 0.8V.

5. These are the differential receiver output. They are internally AC-coupled 100Ω differential lines which should

be terminated with 100Ω (differential) at the user SERDES.

6. These are the differential transmitter inputs. They are AC-coupled, differential lines with 100Ω differential

termination inside the module.

EEPROM Information

The SFP MSA defines a 256-byte memory map in EEPROM describing the transceiver’s capabilities, standard

interfaces, manufacturer, and other information, which is accessible over a 2 wire serial interface at the 8-bit

address 1010000X (A0h). The memory contents refer to Table8.

Table 8 - EEPROM Serial ID Memory Contents (A0h)

Addr.

Field

Size

(Bytes)

Name of Field

Hex

Description

0

1

Identifier

03

SFP

1

1

Ext. Identifier 04

MOD4

2

1

Connector

07

LC

3—10

8

Transceiver

00 00 00 40 00 00 00 00

Transmitter Code

11

1

Encoding

01

8B10B

12

1

BR, nominal

0D

1.25Gbps

13

1

Reserved

00

14

1

Length (9um)-km 28

40km

15

1

Length (9um) FF

16

1

Length (50um) 00