Rev 1.1
Mellanox Technologies
21
Appendix C: QSFP Interface
GND
Rx2n
GND
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
Rx1n
Rx2p
Rx1p
GND
GND
GND
GND
GND
GND
Tx2n
Tx1n
Tx2p
Tx1p
Tx4n
Tx3n
Tx4p
Tx3p
GND
GND
Rx4n
Rx3n
Rx4p
Rx3p
GND
GND
SDA
SCL
Vcc Rx
ResetL
ModSelL
LPMode
Vcc1
VccTx
IntL
ModPrsL
Table 5 - InfiniBand QSFP Connector Pinout
Connector
Pin Number
Connector
Pin Name
Signal Description
1
GND
Ground
2
Tx2n
Transmitter Inverted Data Input
3
Tx2p
Transmitter Non-Inverted Data Input
4
GND
Ground
5
Tx4n
Transmitter Inverted Data Input
6
Tx4p
Transmitter Non-Inverted Data Input
7
GND
Ground
8
ModSelL
Module Select
9
ResetL
Module Reset
10
Vcc Rx
+3.3 V Power supply receiver
11
SCL
2-wire serial interface clock
12
SDA
2-wire serial interface data
13
GND
Ground
14
Rx3p
Receiver Non-Inverted Data Output
15
Rx3n
Receiver Inverted Data Output
16
GND
Ground
17
Rx1p
Receiver Non-Inverted Data Output
18
Rx1n
Receiver Inverted Data Output
19
GND
Ground
20
GND
Ground
21
Rx2n
Receiver Inverted Data Output 3
22
Rx2p
Receiver Non-Inverted Data Output 3
23
GND
Ground
24
Rx4n
Receiver Inverted Data Output 3
25
Rx4p
Receiver Non-Inverted Data Output 3
26
GND
Ground
27
ModPrsL
Module Present
28
IntL
Interrupt
29
Vcc Tx
+3.3 V Power supply transmitter
30
Vcc 1
+3.3 V Power Supply
31
LPMode
Low Power Mode
32
GND
Ground
33
Tx3p
Transmitter Non-Inverted Data Input
34
Tx3n
Transmitter Inverted Data Input
35
GND
Ground
36
Tx1p
Transmitter Non-Inverted Data Input
37
Tx1n
Transmitter Inverted Data Input
38
GND
Ground