Pin Description

QSFP56 Pin Description 2x100Gb/s

The Active Optical Cable (AOC) pin assignment is SFF-8679 compliant. Refer to Connectivity Schematic for QSFP56 Configured as 2x100G for the pin connections.

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

The DDM functions are implemented according to SFF-8636 for reading the following key parameters with associated warning and alarm thresholds:

The transceiver complies with the SFF 8665 specification and has the following key features:

Physical layer link optimization:
- 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-8636 functions and interrupt indications:
- Tx & Rx LOS indication
- Tx & Rx LOL indication