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10G SFP+ Direct Attach Cable (DAC) Datasheet

Compliant with SFF-8431, 8432 and 8472.

Up to 10.3125Gbps data rate per channel

Up to 7m transmission

Operating temperature: 0~70

Single 3.3V power supply

RoHS compliant


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

SFP+ 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

20 pins edge connector

Management Interface

Serial, I2C

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



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