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上海匯海信息科技股份有限公司

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100G QSFP28/4SFP28 Direct Attach Cable (DAC)

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產(chǎn)品型號(hào)FGT-100GSFP4-DAC1M

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GeneralDescriptionQSFP28passivecoppercableassemblyfeatureeightdifferentialcopperpairs

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General Description

QSFP28 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 rang of wire gages-from 26AWG through 30AWG-this 100G copper cable assembly features low insertion loss and low cross talk.

Designed for applications in the data center,networking and telecommunications markets that require a high speed,reliable cable assembly,this next generation product shares the same mating interface with QSFP+ form factor ,making it backward compatible with existing QSFP ports.QSFP28 can be used with current 10G and 14G applications with substantial signal integrity margin.

Features and Benefits

l Compatible with IEEE 802.3bj,IEEE 802.3by and InfiniBａnd EDR

l Supports aggregate data rates of 100Gbps

l Optimized construction to minimize insertion loss and cross talk

l Backward compatible with existing QSFP+ connectors and cages

l Pull-to-release slide latch design

l 26AWG through 30AWG cable

l Straight and break out assembly configurations available

l Customized cable braid termination limits EMI radiation

l Customizable EEPROM mapping for cable signature

l RoHS compliant

Product Applications

l Switches,servers and routers

l Data Center networks

l Storage area networks

l High performance computing

l Telecommunication and wireless infrastructure

l Medical diagnostics and networking

l Test and measurement equipment

Industry Standards

l 100G Ethernet(IEEE 802.3bj)

l 25G Ethernet(IEEE 802.3by)

l InfiniBａnd EDR

l SFF-8665 QSFP+ 28G 4X Pluggable Transceiver Solution(QSFP28)

l SFF-8402 SFP+ 1X 28Gb/s Pluggable Transceiver Solution(SFP28)

Technical Documents

l 108-32081 QSFP28 Copper Module Direct Attach Cable Assembly

l 108-2364 Single Port and Ganged SFP+ Cages,Zsfp+ Single Port and Ganged Cages,ａnd SFP+ Copper Direct Attach Cable Assemblies.

High Speed Characteristics

Parameter	Symbol	Min	Typical	Max	Unit	Note
Differential Impedance	TDR	90	100	110	?
Insertion loss	SDD21	-22.48			dB	At 12.8906 GHz
Differential Return Loss	SDD11 SDD22			See 1	dB	At 0.05 to 4.1 GHz
Differential Return Loss	SDD11 SDD22			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			See 3	dB	At 0.01 to 12.89 GHz
Differential to common-mode return loss	SCD11 SCD22			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
Notes: 1. Reflection Coefficient given by equation SDD11(dB) < -16.5 + 2 × SQRT(f ), with f in GHz 2. Reflection Coefficient given by equation SDD11(dB) < -10.66 + 14 × log10(f/5.5), with f in GHz 3. Reflection Coefficient given by equation SCD11(dB) < -22 + (20/25.78)f, with f in GHz 4. Reflection Coefficient given by equation SCD11(dB) < -15 + (6/25.78)f, with f in GHz 5. 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		Reciever Ground
11			VeeR		Reciever Ground
12		CML-O	RD-		Reciever Data Inverted
13		CML-O	RD+		Reciever Data Non-Inverted
14			VeeR		Reciever Ground
15			VccR		Reciever 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-downto 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
	I/O

12	LVCMOS-	SDA	2-wire serial interface data
12	I/O	SDA	2-wire serial interface data
	I/O

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

Length (m)	Cable AWG
1	30
2	30
3	30/26
4	26
5	26

Regulatory Compliance

Feature	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 2011/6/5/EU and it's Amendment Directives 6/6	RoHS 6/6 compliant

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