QSFP+ 40Gb/s to 4SFP+ Direct Attached Cable

PRODUCT FEATURES

•Up to 40Gbps total bandwidth •4 independent duplex channels 10Gbps •Up to 7meter transmission •Infiniband QDR •QSFP+ interface compliant with SFF-8436 •SFP+ interface compliant with SFF-8472 •Temperature Range: 0~ 70 °C •RoHS compliant

APPLICATIONS

•40G Ethernet •InfiniBand QDR •Networked storage systems •Hubs, Switches, Routers, Servers

PRODUCT DESCRIPTION

The QSFP+ passive cable assemblies are high performance, cost effective I/O solutions for 40G Ethernet. QSFP+ copper cables allow hardware manufactures to achieve high port density, configurability and utilization at a very low cost and reduced power budget.

Ordering Information

Part Number

Description

QP4X-DP0.5M30WG

40G QSFP+ to 4SFP+ 10G DAC passive cable 0.5m

QP4X-DP01M30WG

40G QSFP+ to 4SFP+ 10G DAC passive cable 1m

QP4X-DP02M30WG

40G QSFP+ to 4SFP+ 10G DAC passive cable 2m

QP4X-DP03M30WG

40G QSFP+ to 4SFP+ 10G DAC passive cable 3m

QP4X-DP05M26WG

40G QSFP+ to 4SFP+ 10G DAC passive cable 5m

QP4X-DP07M26WG

40G QSFP+ to 4SFP+ 10G DAC passive cable 7m

General Product Characteristics

Q/4SFP+ DAC Specifications
Number of Lanes Tx & Rx
Channel Data Rate 10.3125 Gbps
Operating Temperature 0 to + 70°C
Storage Temperature -40 to + 85°C
Supply Voltage 3.3 V nominal
Electrical Interface 38 pins edge connector(QSFP+)20 pins edge connector(SFP+) 
Management Interface Serial, I2C
 

High Speed Characteristics

Parameter

Symbol

Min

Typ

Max

Units

Notes

Differential Impedance Zd 90 100 110 ohm
Differential Input Return Loss SDDXX <-12+2* SQRT (f) with f in GHz dB 0.01~4.1GHz
<-6.3+13*Log10/(f/5.5) with f in GHz dB 4.1~11.1GHz
Common Mode Output Return Loss SCCXX < -7+1.6*f with f in GHz dB 0.01~2.5GHz
-3 dB 2.5~11.1GHz
Difference Waveform Distortion Penalty dWDPc 6.75 dB
VMA Loss L 4.4 dB
VMA Loss to Crosstalk Ratio VCR 32.5 dB

Pin Function Definition of QSFP+

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-I/O SCL

2-wire serial interface clock

12 LVCMOS-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

Pin Function Definition of SFP+

Pin Logic Symbol Description
1

VeeT

Module Transmitter Ground
2 LVTTL-O

Tx_Fault

Module Transmitter Fault
3 LVTTL-I

Tx_Disable

Transmitter disable; Turns off transmitter laser output
4 LVTTL-I/O

SDA

2-wire Serial Interface Data Line (Same as MOD-DEF2 in INF-8074i)
5 LVTTL-I/O

SCL

2-wire Serial Interface Clock (Same as MOD-DEF1 in INF-8074i)
6

Mod_ABS

Module Absent, connected to VeeT or VeeR in the module
7 LVTTL-I

RS0

Rate Select 0, optionally controls SFP+ module receiver
8 LVTTL-O

Rx_LOS

Receiver Loss of Signal Indication (In FC designated as Rx_LOS and in Ethernet designated as Signal Detect)
9 LVTTL-I

RS1

Rate Select 1, optionally controls SFP+ module transmitter
10

VeeR

Module Receiver Ground
11

VeeR

Module Receiver Ground
12 CML-O

RD-

Receiver Inverted Data Output
13 CML-O RD+ Receiver Non-Inverted Data Output
14 VeeR Module Receiver Ground
15 VccR Module Receiver 3.3 V Supply
16 VccT Module Transmitter 3.3 V Supply
17 VeeT Module Transmitter Ground
18 CML-I TD+ Transmitter Non-Inverted Data Input
19 CML-I TD- Transmitter Inverted Data Input
20 VeeT Module Transmitter Ground

Mechanical Specifications

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 2011/65/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

QSFP+ 40Gb/s to 4SFP+ Direct Attached Cable Related Video: