DELTA ELECTRONICS, INC.

5

Nov., 2006

Rev. 1B

www.deltaww.com

Pin Function Definitions

Pin Num.

Name

Function

Plug Seq.

Notes

1

VeeT

Transmitter Ground

1

2

TX Fault

Transmitter Fault Indication

3

Note 1

3

TX Disable

Transmitter Disable

3

Note 2

Module disables on high or open

4

MOD-DEF2

Module Definition 2

3

Note 3, 2 wire serial ID interface

5

MOD-DEF1

Module Definition 1

3

Note 3, 2 wire serial ID interface

6

MOD-DEF0

Module Definition 0

3

Note 3, Grounded in Module

7

Rate Select

Not Connect

3

Function not available

8

LOS

Loss of Signal

3

Note 4

9

VeeR

Receiver Ground

1

Note 5

10

VeeR

Receiver Ground

1

Note 5

11

VeeR

Receiver Ground

1

Note 5

12

RD-

Inv. Received Data Out

3

Note 6

13

RD+

Received Data Out

3

Note 7

14

VeeR

Receiver Ground

1

Note 5

15

VccR

Receiver Power

2

3.3 ± 5%, Note 7

16

VccT

Transmitter Power

2

3.3 ± 5%, Note 7

17

VeeT

Transmitter Ground

1

Note 5

18

TD+

Transmit Data In

3

Note 8

19

TD-

Inv. Transmit Data In

3

Note 8

20

VeeT

Transmitter Ground

1

Note 5

Plug Seq.: Pin engagement sequence during hot plugging.

Notes:

1)

TX Fault is an open collector/drain output, which should be pulled up with a 4.7K – 10KΩ resistor on the host

board. Pull up voltage between 2.0V and VccT, R+0.3V. When high, output indicates a laser fault of some kind.

Low indicates normal operation. In the low state, the output will be pulled to < 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 4.7 – 10 K Ω resistor. Its states are:

Low (0 – 0.8V):

Transmitter on

(>0.8, < 2.0V):

Undefined

High (2.0 – 3.465V):

Transmitter Disabled

Open:

Transmitter Disabled

3)

Mod-Def 0,1,2. These are the module definition pins. They should be pulled up with a 4.7K – 10KΩresistor on the

host board. The pull-up voltage shall be VccT or VccR (see Section IV for further details). Mod-Def 0 is grounded

by the module to indicate that the module is present Mod-Def 1 is the clock line of two wire serial interface for

serial ID Mod-Def 2 is the data line of two wire serial interface for serial ID

4)

LOS (Loss of Signal) is an open collector/drain output, which should be pulled up with a 4.7K – 10KΩ resistor.

Pull up voltage between 2.0V and VccT, R+0.3V. When high, this output indicates the received optical power is

below the worst-case receiver sensitivity (as defined by the standard in use). Low indicates normal operation. In

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

5)

VeeR and VeeT may be internally connected within the SFP module.

6)

RD-/+: These are the differential receiver outputs. They are AC coupled 100Ω differential lines which should be

terminated with 100Ω (differential) at the user SERDES. The AC coupling is done inside the module and is thus

not required on the host board. The voltage swing on these lines will be between 370 and 2000 mV differential

(185 – 1000 mV single ended) when properly terminated.