Network Connectors 16 pins

QSFP28 100GbE

QSFP28 carries 100GbE using four 25 Gbps lanes. Used in data center top-of-rack switches and 100G routers with SR4, LR4, and CWDM4 optical variants.

// connector diagram 16 pins

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// Specifications

Standard

SFF-8665 IEEE 802.3bm

Speed

100 Gbps 4x25 Gbps

Lanes

4 TX and 4 RX

Hot Plug

Yes

Use Case

100GbE data centers

// Pin Reference Table

Pin	Name	Function	Type
1	GND	Ground	GND
2	TX2n	TX lane 2 negative	BUS
3	TX2p	TX lane 2 positive	BUS
5	TX4n	TX lane 4 negative	BUS
6	TX4p	TX lane 4 positive	BUS
8	MOD_SEL#	Module select	I/O
9	RESET#	Module reset	I/O
10	VCC_TX	TX supply 3.3V	PWR
11	SCL	I2C clock	BUS
12	SDA	I2C data	BUS
14	RX3p	RX lane 3 positive	BUS
15	RX3n	RX lane 3 negative	BUS
17	RX1p	RX lane 1 positive	BUS
18	RX1n	RX lane 1 negative	BUS
20	ModPrsL	Module present active low	I/O
22	VCC_RX	RX supply 3.3V	PWR

QSFP28 carries 100GbE using four 25 Gbps lanes. Used in data center top-of-rack switches and 100G routers with SR4, LR4, and CWDM4 optical variants.