Pin Description
The transceiver’s pin assignment is SFF-8679 compliant.
Pin |
Symbol |
Description |
Pin |
Symbol |
Description |
1 |
GND |
Ground |
20 |
GND |
Ground |
2 |
Tx2n |
Transmitter Inverted Data Input |
21 |
Rx2n |
Receiver Inverted Data Output |
3 |
Tx2p |
Transmitter Non-Inverted Data Input |
22 |
Rx2p |
Receiver Non-Inverted Data Output |
4 |
GND |
Ground |
23 |
GND |
Grounds |
5 |
Tx4n |
Transmitter Inverted Data Input |
24 |
Rx4n |
Receiver Inverted Data Output |
6 |
Tx4p |
Transmitter Non-Inverted Data Input |
25 |
Rx4p |
Receiver Non-Inverted Data Output |
7 |
GND |
Ground |
26 |
GND |
Ground |
8 |
ModSelL |
Module Select |
27 |
ModPrsL |
Module Present |
9 |
ResetL |
Module 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 |
GND |
GND |
32 |
GND |
Ground |
14 |
Rx3p |
Receiver Non-Inverted Data Output |
33 |
Tx3p |
Transmitter Non-Inverted Data Input |
15 |
Rx3n |
Receiver Inverted Data Output |
34 |
Tx3n |
Transmitter Inverted Data Input |
16 |
GND |
Ground |
35 |
GND |
Ground |
17 |
Rx1p |
Receiver Non-Inverted Data Output |
36 |
Tx1p |
Transmitter Non-Inverted Data Input |
18 |
Rx1n |
Receiver Inverted Data Output |
37 |
Tx1n |
Transmitter Inverted Data Input |
19 |
GND |
Ground |
38 |
GND |
Ground |
QSFP+ Connector Pad Layout
![image2021-10-6_13-47-16.png](https://docscontent.nvidia.com/dims4/default/90bc4a3/2147483647/strip/true/crop/519x310+0+0/resize/519x310!/quality/90/?url=https%3A%2F%2Fk3-prod-nvidia-docs.s3.us-west-2.amazonaws.com%2Fbrightspot%2Fconfluence%2F0000018a-5fe4-d88c-afbe-dfe6bda20000%2Fimages%2Fnetworking%2Fdownload%2Fattachments%2F58765435%2Fimage2021-10-6_13-47-16.png)
The transceiver complies with the SFF 8436 specification and has the following key features:
Physical layer link optimization:
Programmable Tx input equalization
Programmable Rx output amplitude
Programmable 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-8436 functions:
Selectable Tx Squelch per lane
Selectable Tx disable per lane