PROLABS – XLAOCBLx-C

PROLABS – XLAOCBLx-C

40GBd QSFP+ Active Optical Cable Transceiver

XLAOCBLX-C Overview

PROLABS’s XLAOCBLX-C QSFP+ active optical cable transceivers are 4channel active optical cable for QSFP+ applications that is designed to meet the QSFP+ 10GBPS X 4 Pluggable Transceiver SFF-8436 specification. This full-duplex optical assembly offers 4 independent transmit and receive channels, each capable of 10Gbps for an aggregate bandwidth of 40Gbps.

The cables use the standard multimode fiber cable carrying a nominal wavelength of 850nm. The electrical interface is standard 38 contact edge type connector and is electrically compliant with the SFI+ and PPI interface supporting Infiniband, Ethernet, Fiber Channel. The connector is hot pluggable and provides I2C serials access via an on-board microcontroller.

QSFP+ AOC can be used as a direct replacement for traditional copper cables with the added benefit of a lighter weight and smaller diameter solution for cable lengths from 1 to 100 meters.

Product Features

 4 high-speed full duplex channels

 QSFP+ MSA compliant

 Cable lengths from 1 to 100 meters

 Small 3mm diameter fiber cable

 Low Power consumption, less than 1W

 RoHS Compliance

 Operating temperature range: 0℃ to 70℃.

Applications

 40G Ethernet

 Infiniband interconnects

Ordering Information

Part Number

XLAOCBLx-C

Description

40G QSFP+ Active optical Cable (length from 1m to 100m)

General Specifications

Parameter

Bit Error Rate

Operating Temperature

Storage Temperature

Input Voltage

Maximum Voltage

Symbol

BER

T

STO

V

CC

V

T

OP

MAX

Min

 0.5

0

 40

3.14

Typ

3.3

Max

10  15

70

85

3.47

3.6

Unit

℃

℃

V

V

Remarks

Case temperature

Ambient temperature

For electrical power interface

Link Distances

Parameter

40 GBd

Fiber Type

MMF

Distance Range (m)

Up to 100

AOC Electrical Input Requirements

Parameter

Data Rate Per Channel

Differential Input Amplitude

Single Ended Voltage Tolerance

AC Common Mode Voltage

Total Jitter

Data Dependent Jitter

Eye Mask

Symbol Min

Dr

V

IN_PP

V

150

-0.3

15 Vcm

T j

DDJ

Typ Max Unit Remarks

0.001

10.5

GB/s Non condensing

See note

1600

3.8

mV

V mV

0.28

UIp-p

0.1

UIp-p

Note: The worst case electrical input is defined by the eye mask:

AOC Electrical Onput Requirements

Parameter

Data Rate Per Channel

Differential Output Amplitude

Differential Output Amplitude in

Squelched state

Single Ended Voltage Tolerance

Output AC Common Mode Voltage

Output Transition Time

Total Jitter

Deterministic Jitter

Eye Mask

Symbol Min

Dr

Vout_PP 340

Vout_sq

V

Tr

,

Vcm

Tf

Tj

DJ

-0.3

28

Typ Max Unit Remarks

0.001

10.5

GB/s Non condensing

700

50 mV mV

See note

Note:

3.8

7.5

V mV RMS ps

0.7

UIp-p

0.4

UIp-p

Block Diagram of Transceiver

The QSFP AOC has miniature optical engine embedded into each end of the cable assembly. The engines interconnect 4 independent transmit/receive lanes.

A functional block diagram of the engine is shown in the above Figure. The transmitter sections consists of a

4- channel VCSEL array, a 4-channel input buffer and laser driver.

An on board micro-controller provides control, diagnostic and monitoring for the cable functions, as well as the external I2C serial communication interface.

The Receiver section consists of a 4-channel PIN photodiode array, a 4-channel TIA array, and a 4channel output buffer.

Dimensions

ALL DIMENSIONS ARE ±0.2mm UNLESS OTHERWISE SPECIFIED

UNIT: mm

PCB Layout Recommendation

Electrical Pad Layout

Pin Assignment

6

31

32

33

34

27

28

29

30

35

36

37

23

24

25

26

19

20

21

22

15

16

17

18

11

12

13

14

38

7

8

9

10

PIN # Symbol

1

2

GND

Tx2n

3 Tx2p

4

5

GND

Tx4n

Ground

Description

Transmitter Inverted Data Input

Ground

Transmitter Inverted Data Input

Transmitter Non-Inverted Data Input

Tx4p Transmitter Non-Inverted Data Input

GND Ground

ModSelL Module Select

ResetL

V cc

RX

Module Reset

+3.3V Power Supply Receiver

GND

GND

Rx2n

Rx2p

GND

Rx4n

Rx4p

GND

SCL

SDA

GND

Rx3p

Rx3n

GND

Rx1p

Rx1n

2-wire serial interface clock

2-wire serial interface data

Ground

Ground

Ground

Ground

Ground

Ground

Receiver Non-Inverted Data Output

Receiver Inverted Data Output

Receiver Inverted Data Output

Receiver Inverted Data Output

Receiver Inverted Data Output

Receiver Non-Inverted Data Output

Receiver Non-Inverted Data Output

Receiver Non-Inverted Data Output

ModPrsL Module Present

IntL

V cc

V

TX cc1

LPMode

GND

Tx3p

Tx3n

GND

Tx1p

Tx1n

Interrupt

+3.3V Power Supply transmitter

+3.3V Power Supply

Low Power Mode

Ground

Ground

Transmitter Non-Inverted Data Input

Transmiiter Inverted Data Input

Transmiiter Inverted Data Input

Transmitter Non-Inverted Data Input

GND Ground

References

1.

IEEE standard 802.3ba. IEEE Standard Department, 2010.

2.

QSFP+ 10Gbs 4X PLUGGABLE TRANSCEIVER – SFF-8436

Remarks