40G Q/4SFP+ Direct Attach Cable

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

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

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

Differential Impedance

TDR

90

100

110

?

Insertion loss

SDD21

-17.04

dB

At 5.15625 GHz

Differential Return Loss

SDD11

SDD22

See 1

dB

At 0.05 to 4.1 GHz

See 2

dB

At 4.1 to 11.1 GHz

Differential to common-mode

return loss

SCD11

SCD22

-10

dB

At 0.2 to 11.1 GHz

Common-mode to common-mode output return loss

SCC11

SCC22

-3

dB

At 0.01 to 11.1 GHz

Notes:

1. Reflection Coefficient given by equation SDD11(dB) < -12 + 2 × SQRT(f ), with f in GHz

2. Reflection Coefficient given by equation SDD11(dB) < -6.3 + 13 × log10(f/5.5), with f in GHz

1

30

3

30

5

26

7

26

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