Description

Technical Parameters

Products Features

● Supports 4x25GBASE-SR applications

● Compliant with QSFP28 MSA SFF-8636, SFP28 MSA SFF-8431, and SF-8472 specifications

● Offers a multi-rate capability of up to 25.78125Gbps per lane

● Operates with a +3.3V single power supply

● Features low power consumption

● UL-certified cables available as an option

● Commercial operating case temperature range: 0°C to +70°C

● Compliant with RoHS standards

Applications

● Supports 100GBASE-SR4 with a data rate of 25.78125Gbps per lane

● Compatible with InfiniBand QDR and EDR technologies

● Supports other optical link configurations

Outline drawing

QSFP28	L	L1	L2	L3	L4	W	W1	W2	H	H1	H2	H3	H4	H5	H6
Max	72.2	-	128	4.35	61.4	18.45	-	6.2	8.6	12.4	5.35	2.5	1.6	2.0	-
Type	72.0	-	-	4.20	61.2	18.35	-	-	8.5	12.2	5.2	2.3	1.5	1.8	6.55
Min	68.8	16.5	124	4.05	61.0	18.25	2.2	5.8	8.4	12.0	5.05	2.1	1.3	1.6	-

SFP28	L	L1	L2	L3	W	W1	W2	H	H1	A
Max	57.6	47.7	44.55	119.9	13.8	14.0	12.3	8.7	10.3	45.25
Type	57.4	47.5	44.35	117.9	13.55	13.8	12.1	8.5	10.1	45
Min	57.2	47.3	44.15	115.9	13.3	13.6	11.9	8.4	9.9	44.65

Cable Length

Parameter	Value	Units
Diameter	3	mm
Minimum bend radius	30	mm
Length tolerance	Length < 1 m: +5 /-0	cm
	1 m ≤length ≤ 4.5 m: +15 / -0	cm
	5 m ≤length ≤ 14.5 m: +30 / -0	cm
	Length≥15.0 m +2% / -0	m
Cable color	Orange(OM2),Aqua(OM3),Megenta(OM4)

Breakout Cable Nominal Length

Total Length X (Unit: m)	Breakout Point Measured from QSFP LQ (Unit: m)	Breakout Point Measured from SFP LS(Unit: m)
1	0.3	0.7
2	0.6	1.4
3	1	2
5	2	3
7	4	3
10	7	3
15	12	3
20	17	3
25	22	3
30	27	3
40	37	3
50	47	3

Pin arrangement

Figure 2 Pin View for QSFP28

Pin Function Definitions for QSFP28

Pin	Symbol	Name/Description	Notes
1	GND	Ground	1
2	Tx2n	Transmitter Inverted Data Input
3	Tx2p	Transmitter Non-Inverted Data Input
4	GND	Ground	1
5	Tx4n	Transmitter Inverted Data Input
6	Tx4p	Transmitter Non-Inverted Data Input
7	GND	Ground	1
8	ModSelL	Module Select
9	ResetL	Module Reset
10	Vcc Rx	+3.3V Power Supply Receiver
11	SCL	2-wire serial interface clock
12	SDA	2-wire serial interface data
13	GND	Ground	1
14	Rx3p	Receiver Non-Inverted Data Output
15	Rx3n	Receiver Inverted Data Output
16	GND	Ground	1
17	Rx1p	Receiver Non-Inverted Data Output
18	Rx1n	Receiver Inverted Data Output
19	GND	Ground	1
20	GND	Ground	1
21	Rx2n	Receiver Inverted Data Output
22	Rx2p	Receiver Non-Inverted Data Output
23	GND	Ground	1
24	Rx4n	Receiver Inverted Data Output
25	Rx4p	Receiver Non-Inverted Data Output
26	GND	Ground	1
27	ModPrsL	Module Present
28	IntL	Interrupt
29	Vcc Tx	+3.3V Power supply transmitter
30	Vcc1	+3.3V Power supply
31	LPMode	Low Power Mode
32	GND	Ground	1
33	Tx3p	Transmitter Non-Inverted Data Input
34	Tx3n	Transmitter Inverted Data Input
35	GND	Ground	1
36	Tx1p	Transmitter Non-Inverted Data Input
37	Tx1n	Transmitter Inverted Data Input
38	GND	Ground	1

Note: 1. Circuit ground is internally isolated from chassis ground.

Figure 3 Pin View for SFP28

Pin Function Definitions

Pin	Symbol	Name/Description	Notes
1	VEET	Module Transmitter Ground	1
2	TX_FAULT	Module Transmitter Fault	2
3	TX_DISABLE	Transmitter Disable; Turns off transmitter laser output	3
4	SDA	2-Wire Serial Interface Data Line (MOD-DEF2)
5	SCL	2-Wire Serial Interface Clock (MOD-DEF1)
6	MOD_ABS	Module Absent, connected to V_EET or V_EER in the module	2
7	RS0	Rate Select 0, optionally controls SFP+ module receiver
8	RX_LOS	Receiver Loss of Signal Indication (In FC designated as Rx_LOS and in Ethernet designated as NOT Signal Detect)	2
9	RS1	Rate Select 1, optionally controls SFP+ module transmitter
10	V_EER	Module Receiver Ground	1
11	V_EER	Module Receiver Ground	1
12	RD-	Receiver Inverted Data Output
13	RD+	Receiver Non-Inverted Data Output
14	V_EER	Module Receiver Ground	1
15	V_CCR	Module Receiver 3.3 V Supply
16	V_CCT	Module Transmitter 3.3 V Supply
17	V_EET	Module Transmitter Ground	1
18	TD+	Transmitter Non-Inverted Data Input
19	TD-	Transmitter Inverted Data Input
20	V_EET	Module Transmitter Ground	1

Note:

1. The ground pins of the module are electrically isolated from the module's casing.

2. The pins should be pulled up using a resistor in the range of 4.7KΩ to 10KΩ to a voltage that falls between 3.14V and 3.46V on the host board.

3. Inside the module, the pin is pulled up to VCCT through a resistor ranging from 4.7KΩ to 10KΩ.

Recommended Operating Conditions

Parameter	Symbol	Min.	Typical	Max.	Unit	Notes
Operating Case Temperature	T_C	0	-	+70	°C
Power Supply Voltage	Vcc	3.14	3.3	3.47	V
Power Dissipation per QSFP28	Pd	-	-	2.5	W
Power Dissipation per SFP28	Pd	-	-	1.0	W	1
Bit Rate Bit Rate per Lane	BR	10.3125	25.78125	-	Gbps	Per lane

Note: 1 Per terminal

Absolute Maximum Ratings

Parameter	Symbol	Min.	Typical	Max.	Unit	Notes
Supply Voltage	Vcc₃	-0.5	-	+3.6	V
Storage Temperature	T_s	-5	-	+75	°C
Operating Humidity	RH	+5	-	+85	%	1

Note: 1 No condensation

Electrical Characteristics

Electrical Characteristics for QSFP28：

Parameter		Symbol	Min.	Typ.	Max.	Units	Notes
Transmitter
Differential Data Input Swing		Vout	200	-	1000	mV
Input Differential Impedance		Z_D	90	100	110	Ω
ModSelL	Module Select	VOL	V_EE-0.3	-	0.4	V
ModSelL	Module Unselect	VOH	2.0	-	V_CC+0.3	V
LPMode	Low Power Mode	VIL	V_EE-0.3	-	0.8	V
LPMode	Normal Operation	VIH	2.0	-	V_CC+0.3	V
ResetL	Reset	VIL	V_EE-0.3	-	0.8	V
ResetL	Normal Operation	VIH	2.0	-	V_CC+0.3	V
Receiver
Differential Data Output Swing		Vin,P-P	200	-	1000	mV_PP
Output Differential Impedance		Z_D	90	100	110	Ω
ModPrsL	Normal Operation	VOL	V_EE-0.3	-	0.4	V
IntL	Interrupt	VOL	V_EE-0.3	-	0.4	V
IntL	Normal Operation	VoH	2.0	-	V_CC+0.3	V
Bit Error Rate		BER			E-12		1

Electrical Characteristics for SFP28：

Parameter		Symbol		Min.	Typ.	Max.	Units		Notes
Electrical Transmitter Characteristics
Differential Data Input Swing		Vin,P-P		200	-	1000		mV_PP
Input Differential Impedance		ZIN		90	100	110		Ω
Tx_Fault	Normal Operation	VOL		V_EE-0.3	-	0.4		V
	Transmitter Fault	VOH		2.0	-	V_CC+0.3		V
Tx_Disable	Normal Operation	VIL		V_EE-0.3	-	0.8		V
	Laser Disable	VIH		2.0	-	V_CC+0.3		V
Electrical Receiver Characteristics
Differential Date Output			Vout	200	-	1000	mV
Output Differential Impedance			Z_D	90	100	110	Ω
Rx_LOS	Normal Operation		VOL	V_EE-0.3	-	0.4	V
	Lose Signal		VoH	2.0	-	V_CC+0.3	V
Bit Error Rate			BER	-	-	E-12	-

FAQ

1. What is the function of the 100G QSFP28 to 4x25G SFP28 Breakout AOC Active Optical Cable?

A: The 100G QSFP28 to 4x25G SFP28 Breakout AOC Active Optical Cable is designed to convert electrical signals to optical signals and vice versa during communication. It features a QSFP28 connector at one end and four SFP28 connectors at the other, providing four independent data transmission channels, each capable of operating at up to 25.78125 Gbps.

2. What is the maximum transmission distance of this cable?

A: The maximum transmission distance of the 100G QSFP28 to 4x25G SFP28 Breakout AOC Active Optical Cable can reach up to 100 meters on OM4 MMF.

Hot Tags: 100g qsfp28 to 4x25g sfp28 breakout aoc active optical cable, China 100g qsfp28 to 4x25g sfp28 breakout aoc active optical cable manufacturers, suppliers, factory, SFP-10G-LR, SFP-10G-BIDI-1490-80, , SFPDD 100G DAC 1 10 M, SFP28-25G-SR, QSFP28-2X50G-DAC