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Ref: ATGBICS_F5-UPG-SFPC-R-C_V1

Page 2 of 7

Product Datasheet

SFP to Host Connector Pin Out

Pin

Signal name

Description

MSA Notes

1

VEET

Transmitter ground (common with receiver ground)

2

TFAULT

Transmitter Fault. Not supported

Note 1

3

TDIS

Transmitter Disable. PHY disabled on high or open

Note 2

4

MOD_DEF(2)

Module Definition 2. Data line for Serial ID.

Note 3

5

MOD_DEF(1)

Module Definition 1. Clock line for Serial ID.

Note 3

6

MOD_DEF(0)

Module Definition 0. Grounded within the module.

Note 3

7

Rate Select

No connection required

8

LOS

Loss of Signal - High Indicates Loss of Signal

Note 4

9

VEER

Receiver Ground (common with transmitter ground)

10

VEER

Receiver Ground (common with transmitter ground)

11

VEER

Receiver Ground(common with transmitter ground)

12

RD-

Receiver Inverted DATA out. AC Coupled

Note 5

13

RD+

Receiver Non-inverted DATA out. AC Coupled

Note 5

14

VEER

Receiver Ground (common with transmitter ground)

15

VCCR

Receiver Power Supply

Note 6

16

VCCT

Transmitter Power Supply

Note 6

17

VEET

Transmitter Ground (Common with Receiver Ground)

18

TD+

Transmitter Non-Inverted DATA in. AC Coupled.

Note 7

19

TD-

Transmitter Inverted DATA in. AC Coupled.

Note 7

20

VEET

Transmitter Ground (common with receiver ground)

Table 1. SFP to host connector pin assignments and descriptions

Notes:

1. TX Fault is not used and is always tied to ground through a 100-ohm resistor.

2. TX Disable as described in the MSA is not applicable to the 1000BASE-T module, but is used for

convenience as an input to reset the internal ASIC. This pin is pulled up within the module with a 4.7 KW

resistor.

• Low (0 – 0.8 V): Transceiver on

• Between (0.8 V and 2.0 V): Undefined

• High (2.0 – 3.465 V): Transceiver in reset state

• Open: Transceiver in reset state

3. Mod-Def 0,1,2. These are the module definition pins. They should be pulled up with a 4.7-10 KW resistor

on the host board to a supply less than VCCT + 0.3 V or VCCR + 0.3 V.

• Mod Def 0 is tied to ground through a 100-ohm resistor to indicate that the module is present.

• Mod-Def 1 is clock line of two wire serial interface for optional serial ID

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

4. LVTTL compatible with a maximum voltage of 2.5V. Not supported on HTSFP-24-111X