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    • 40G Q/4SFP+ Direct Attach Cable(DAC)
    • 40G Q/4SFP+ Direct Attach Cable(DAC)
40G Q/4SFP+ Direct Attach Cable(DAC)
QSFP+ Direct Attach Cables are compliant with the SFF-8436 specifications. SFP+ Direct Attach Cables are compliant with the SFF-8431, SFF-8432 and SFF-8472 specifications. Various choices of wire gauge are available from 30 to 24 AWG with various choices of cable length (up to 7m).
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  • Technology Specs
  • Drawings

● Compliant with SFF- 8436, SFF-8431, SFF-8432 and SFF-8472

● Up to 10. 3125Gbps data rate per channel

● Up to 7m transmission

● Operating temperature: 0~70℃

● Single 3.3V power supply

● Cost-effective copper solution

● Lowest total system power solution

● Lowest total system EMI solution

● Optimized design for Signal Integrity

● RoHS compliant


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Definition:

QSFP+ Pin Function 

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


 

SFP+ Pin Function

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


Characteristics:

General Product 

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

Parameter

Symbol

Min

Typ

Max

Units

Notes

Differential Impedance

Zd

90

100

110

Ω


 

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


1.jpg

Length (m)

Cable AWG

1

30/28

2

30/28

3

30/28

4

28

5

28/24

6

24

7

24

 

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


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