Pin Num.	Name	Function			Plug Seq.	Notes
1	VeeT	Transmitter ground			1	Note 5
2	TX fault	Transmitter fault indication			3	Note 1
3	TX disable	Transmitter disable			3	Note 2, module disables on high or open
4	SDA	Module definition 2			3	Data line for serial ID
5	SCL	Module definition 1			3	Clock line for serial ID.
6	MOD_ABS	Module definition 0			3	Note 3
7	RS0	RX rate select(LVTTL).			3	No function implement..
8	LOS	Loss of signal			3	Note 4
9	RS1	TX rate select(LVTTL).			1	No function implement..
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 6
14	VeeR	Receiver ground			1	Note 5
15	VccR	Receiver power			2	3.3V ± 5%, Note 7
16	VccT	Transmitter power			2	3.3V ± 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

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 4.7-10KΩ 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)Module absent, connected to VEET or VEER in the module

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 with100Ω(differential) at the user SERDES. The AC coupling is done inside the module and is thus not required on the host board.

7) VccR and VccT are the receiver and transmitter power supplies. They are defined as 3.3V ±5% at the SFP+ connector pin. Maximum supply current is 300mA. Inductors with DC resistance of less than 1 ohm should be used in order to maintain the required voltage at the SFP+ input pin with 3.3V supply voltage. When the recommended supply-filtering network is used, hot plugging of the SFP+ transceiver module will result in an inrush current of no more than 30mA greater than the steady state value. VccR and VccT may be internall connected within the SFP+ transceiver module

8) . TD-/+: These are the differential transmitter inputs. They are AC-coupled, differential lines with 100 differential termination inside the module. The AC coupling is done inside the module and is thus not required on the host board.