QSFP28 100Gb/s to 4 SFP28 Direct Attached Cable

Product Detail

PRODUCT FEATURES

•Supports aggregate data rates of 100Gbps •Backward compatible with QSFP28 port •Compatible with IEEE 802.3bj, IEEE 802.3by •Compliant with InfiniBand EDR •Compliant with SFF-8665 and SFF-8636 •Operating temperature: 0~70℃ •Single 3.3V power supply •Lower total system power solution •Lower total system EMI solution •RoHS compliant

APPLICATIONS

•100G Ethernet and InfiniBand EDR •InfiniBand EDR •Switches, servers and routers •Storage area networks

PRODUCT DESCRIPTION

Intcera’s QSFP28 to 4 SFP28 passive copper cable assembly feature eight differential copper pairs, providing four data transmission channels at speeds up to 28Gbps per channel, and meets 100G Ethernet,25G Ethernet and InfiniBand Enhanced Data Rate (EDR) requirements. Available in a broad range of wire gages-from 26AWG through 30AWG-this 100G copper cable assembly features low insertion loss.

Ordering Information

Part Number	Description
QP1H4X-DP1M30WG	100G QSFP28 to 4 SFP28 DAC passive cable 30AWG 1m
QP1H4X-DP2M30WG	100G QSFP28 to 4 SFP28 DAC passive cable 30AWG 2m
QP1H4X-DP3M26WG	100G QSFP28 to 4 SFP28 DAC passive cable 26AWG 3m
QP1H4X-DP5M26WG	100G QSFP28 to 4 SFP28 DAC passive cable 26AWG 5m

High Speed Characteristics

Parameter	Symbol	Min	Typical	Max	Unit	Note
Differential Impedance	TDR	90	100	110	ohm
Insertion loss	SDD21	8		22.48	dB	At 12.8906 GHz
Differential Return Loss	SDD11 SDD22	12.45		See 1	dB	At 0.05 to 4.1 GHz
Differential Return Loss	SDD11 SDD22	3.12		See 2	dB	At 4.1 to 19 GHz
Common-mode to common-mode output return loss	SCC11 SCC22	2			dB	At 0.2 to 19 GHz
Differential to common-mode return loss	SCD11 SCD22	12		See 3	dB	At 0.01 to 12.89 GHz
Differential to common-mode return loss	SCD11 SCD22	10.58		See 4	dB	At 12.89 to 19 GHz
Differential to common Mode Conversion Loss	SCD21-IL	10			dB	At 0.01 to 12.89 GHz
				See 5		At 12.89 to 15.7 GHz
		6.3				At 15.7 to 19 GHz
Channel Operating Margin	COM	3			dB
Notes: Reflection Coefficient given by equation SDD11(dB) < 16.5 - 2 × SQRT(f ), with f in GHz Reflection Coefficient given by equation SDD11(dB) < 10.66 - 14 × log10(f/5.5), with f in GHz Reflection Coefficient given by equation SCD11(dB) < 22 - (20/25.78)f, with f in GHz Reflection Coefficient given by equation SCD11(dB) < 15 - (6/25.78)f, with f in GHz Reflection Coefficient given by equation SCD21(dB) < 27 - (29/22)*f, with f in GHz

Pin Descriptions

SFP28 Pin Function Definition

Pin		Logic	Symbol		Name/Description	Notes
1			VeeT		Transmitter Ground
2		LV-TTL-O	TX Fault		N/A	1
3		LV-TTL-I	TX_DIS		Transmitter Disable	2
4		LV-TTL-I/O	SDA		Tow Wire Serial Data
5		LV-TTL-I	SCL		Tow Wire Serial Clock
6			MOD_DEF0		Module present, connect to VeeT
7		LV-TTL-I	RS0		N/A	1
8		LV-TTL-O	LOS		LOS of Signal	2
9		LV-TTL-I	RS1		N/A	1
10			VeeR		Receiver Ground
11			VeeR		Receiver Ground
12		CML-O	RD-		Receiver Data Inverted
13		CML-O	RD+		Receiver Data Non-Inverted
14			VeeR		Receiver Ground
15			VccR		Receiver Supply 3.3V
16			VccT		Transmitter Supply 3.3V
17			VeeT		Transmitter Ground
18		CML-I	TD+		Transmitter Data Non-Inverted
19		CML_I	TD-		Transmitter Data Inverted
20			VeeT		Transmitter Ground
1.	Signals not supported in SFP+ Copper pulled-down to VeeT with 30K ohms resistor
2.	Passive cable assemblies do not support			LOS and TX_DIS

QSFP28 Pin Function Definition

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

Mechanical Specifications

Regulatory Compliance

Item	Test Method	Performance
Electrostatic Discharge (ESD) to the Electrical Pins	MIL-STD-883C Method 3015.7	Class 1(>2000 Volts)
Electromagnetic Interference(EMI)	FCC Class B	Compliant with Standards
	CENELEC EN55022 Class B
	CISPR22 ITE Class B
RF Immunity(RFI)	IEC61000-4-3	Typically Show no Measurable Effect from a 10V/m Field Swept from 80 to 1000MHz
RoHS Compliance	RoHS Directive 2011/65/EU and it's Amendment Directives 6/6	RoHS 6/6 compliant

Appendix A. Document Revision

Version No.	Date	Description
1.0	2018-3-1	Preliminary datasheet

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