The Active Optical Cable (AOC) pin assignment is SFF-8679 compliant.
QSFP56 Pin Description 200GbE End
|
Pin |
Symbol |
Description |
Pin |
Symbol |
Description |
|---|---|---|---|---|---|
|
1 |
Ground |
Ground |
20 |
Ground |
Ground |
|
2 |
Tx2n |
Connected to Port 1 lane Rx2 Inverted Data |
21 |
Rx2n |
Connected to Port 1 lane Tx2 Inverted Data |
|
3 |
Tx2p |
Connected to Port 1 lane Rx2 Non-Inverted Data |
22 |
Rx2p |
Connected to Port 1 lane Tx2 Non-Inverted Data |
|
4 |
Ground |
Ground |
23 |
Ground |
Grounds |
|
5 |
Tx4n |
Connected to Port 2 lane Rx2 Non-Inverted Data |
24 |
Rx4n |
Connected to Port 2 lane Tx2 Inverted Data |
|
6 |
Tx4p |
Connected to Port 2 lane Rx2 Inverted Data |
25 |
Rx4p |
Connected to Port 2 lane Tx2 Non-Inverted Data |
|
7 |
Ground |
Ground |
26 |
Ground |
Ground |
|
8 |
Mod-SelL |
Cable Select |
27 |
ModPrsL |
Cable Present |
|
9 |
ResetL |
Cable Reset |
28 |
IntL |
Interrupt |
|
10 |
Vcc Rx |
+3.3V Power supply receiver |
29 |
Vcc Tx |
+3.3V Power supply transmitter |
|
11 |
SCL |
2-wire serial interface clock |
30 |
Vcc1 |
+3.3V Power Supply |
|
12 |
SDA |
2-wire serial interface data |
31 |
LPMode |
Low Power Mode |
|
13 |
Ground |
Ground |
32 |
Ground |
Ground |
|
14 |
Rx3p |
Connected to Port 2 lane Tx1 Non-Inverted Data |
33 |
Tx3p |
Connected to Port 2 lane Rx1 Non-Inverted Data |
|
15 |
Rx3n |
Connected to Port 2 lane Tx1 Inverted Data |
34 |
Tx3n |
Connected to Port 2 lane Rx1 Inverted Data |
|
16 |
Ground |
Ground |
35 |
Ground |
Ground |
|
17 |
Rx1p |
Connected to Port 1 lane Tx1 Non-Inverted Data |
36 |
Tx1p |
Connected to Port 1 lane Rx1 Non-Inverted Data |
|
18 |
Rx1n |
Connected to Port 1 lane Tx1 Inverted Data |
37 |
Tx1n |
Connected to Port 1 lane Rx1 Inverted Data |
|
19 |
Ground |
Ground |
38 |
Ground |
Ground |
QSFP56 Module Pad Layout
QSFP56 Pin Description 100GbE End
|
Pin |
Symbol |
Description |
Pin |
Symbol |
Description |
|---|---|---|---|---|---|
|
1 |
Ground |
Ground |
20 |
Ground |
Ground |
|
2 |
Tx2n |
Connected to lane Rx2 Inverted Data |
21 |
Rx2n |
Connected to lane Tx2 Inverted Data |
|
3 |
Tx2p |
Connected to lane Rx2 Non-Inverted Data |
22 |
Rx2p |
Connected to lane Tx2 Non-Inverted Data |
|
4 |
Ground |
Ground |
23 |
Ground |
Grounds |
|
5 |
Not connected |
Not connected |
24 |
Not connected |
Not connected |
|
6 |
Not connected |
Not connected |
25 |
Not connected |
Not connected |
|
7 |
Ground |
Ground |
26 |
Ground |
Ground |
|
8 |
Mod-SelL |
Cable Select |
27 |
ModPrsL |
Cable Present |
|
9 |
ResetL |
Cable Reset |
28 |
IntL |
Interrupt |
|
10 |
Vcc Rx |
+3.3V Power supply receiver |
29 |
Vcc Tx |
+3.3V Power supply transmitter |
|
11 |
SCL |
2-wire serial interface clock |
30 |
Vcc1 |
+3.3V Power Supply |
|
12 |
SDA |
2-wire serial interface data |
31 |
LPMode |
Low Power Mode |
|
13 |
Ground |
Ground |
32 |
Ground |
Ground |
|
14 |
Not connected |
Not connected |
33 |
Not connected |
Not connected |
|
15 |
Not connected |
Not connected |
34 |
Not connected |
Not connected |
|
16 |
Ground |
Ground |
35 |
Ground |
Ground |
|
17 |
Rx1p |
Connected to lane Tx1 Non-Inverted Data |
36 |
Tx1p |
Connected to lane Rx1 Non-Inverted Data |
|
18 |
Rx1n |
Connected to lane Tx1 Inverted Data |
37 |
Tx1n |
Connected to lane Rx1 Inverted Data |
|
19 |
Ground |
Ground |
38 |
Ground |
Ground |
QSFP56 Module Pad Layout
The pinout of the 100GbE ends of the cable is identical to the 200GbE end except that RF lanes 3 and 4 (pins 5, 6, 14, 15, 24, 25, 33, 34) are not used.
Digital Diagnostics
The transceiver complies with the SFF 8665 specification and has the following key features:
-
Physical layer link optimization:Programmable Rx output amplitudeProgrammable Rx output pre-emphasis
-
Digital Diagnostic Monitoring (DDM):
-
Rx receive optical power monitor
-
Tx transmit optical power monitor
-
Tx bias current monitor
-
Supply voltage monitor
-
Transceiver case temperature monitor
-
-
Other SFF-8636 functions and interrupt indications:Tx & Rx LOS indicationTx & Rx LOL indication
Last updated: