81
User Manual
Appendix C: Interface Specifications
C.1
SFP28 Interface
Table 30 - QSFP Interface Pins 1-23
Connec
tor Pin
Numbe
r
Connect
or 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
Mod-
SelL
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
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
J3 and J6
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
J3 and J6