Specification

PHQCUP768XX

40G QSFP+ Direct Attach Cable (DAC)

General Description

QSFP+ Direct Attach Cables are compliant with the SFF-8436 specifications. Various choices of wire gauge are available from 30 to 24 AWG with various choices of cable length (up to 7m).

Features

  • Compliant with SFF- 8436.
  • Up to 10.3125Gbps data rate per channel
  • Up to 7m transmission
  • Operating temperature: 0~70℃
  • Single 3.3V power supply
  • RoHS compliant

Benefits

  • Cost-effective copper solution
  • Lowest total system power solution
  • Lowest total system EMI solution
  • Optimized design for Signal Integrity

Applications

  • 40G Ethernet

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-

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

General Product Characteristics

QSFP+ 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

Management Interface

Serial, I2C

High Speed Characteristics

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

 

Mechanical Specifications

The connector is compatible with the SFF-8436 specification.

Length (m)

Cable AWG

1

30

2

30/26

3

30/26

4

26

5

26/24

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