Alpha Bridge AB-QSFP+-2 Datasheet

Features

  • 4 CWDM lanes MUX/DEMUX design
  • Up to 11.2Gbps per channel bandwidth
  • Aggregate bandwidth of > 40Gbps
  • Duplex LC connector
  • Compliant with 40G Ethernet IEEE802.3ba and 40GBASE-LR4 Standard
  • QSFP MSA compliant
  • Up to 2KM transmission
  • Compliant with QDR/DDR Infiniband data rates
  • Single +3.3V power supply operating
  • Built-in digital diagnostic functions
  • Temperature range 0°C to 70°C
  • RoHS Compliant Part

Applications

  • Rack to rack
  • Data centers Switches and Routers
  • Metro networks
  • Switches and Routers
  • 40G BASE-LR4 Ethernet Links

Product Description

The transceiver module is designed for 2KM optical communication applications. The design is compliant to 40GBASE-LR4 of the IEEE P802.3ba standard. The module converts 4 inputs channels (ch) of 10Gb/s electrical data to 4 CWDM optical signals, and multiplexes them into a single channel for 40Gb/s optical transmission. Reversely, on the receiver side, the module optically de-multiplexes a 40Gb/s input into 4 CWDM channels signals, and converts them to 4 channel output electrical data. The central wavelengths of the 4 CWDM channels are 1271, 1291, 1311 and 1331 nm as members of the CWDM wavelength grid defined in ITU-T G694.2. It contains a duplex LC connector for the optical interface and a 38-pin connector for the electrical interface. To minimize the optical dispersion in the long-haul system, single-mode fiber (SMF) has to be applied in this module. The product is designed with form factor, optical/electrical connection and digital diagnostic interface according to the QSFP Multi-Source Agreement (MSA). It has been designed to meet the harshest external operating conditions including temperature, humidity and EMI interference. The module operates from a single +3.3V power supply and LVCMOS/LVTTL global control signals such as Module Present, Reset, Interrupt and Low Power Mode are available with the modules. A 2-wire serial interface is available to send and receive more complex control signals and to obtain digital diagnostic information. Individual channels can be addressed and unused channels can be shut down for maximum design flexibility.

The QSFP+-LR4 is designed with form factor, optical/electrical connection and digital diagnostic interface according to the QSFP Multi-Source Agreement (MSA). It has been designed to meet the harshest external operating conditions including temperature, humidity and EMI interference. The module offers very high functionality and feature integration, accessible via a two-wire serial interface.

Absolute Maximum Ratings

Parameter Symbol Min. Typical Max. Unit
Storage Temperature TS -40   85 °C
Supply Voltage VCCT, R -0.5   4 V
Relative Humidity RH 0   85 %

Recommended Operating Conditions

Parameter Symbol Min. Typical Max. Unit
Case operating Temperature TC 0   70 °C
Supply Voltage VCCT, R 3.13 3.3 3.47 V
Supply Current ICC     900 mA
Power Dissipation PD     3 W

Electrical Characteristics

Parameter Symbol Min Typ. Max Unit Note
Data Rate per Channel   - 10.3125 11.2 Gbps  
Power Consumption   - 2.5 3.5 W  
Supply Current Icc   0.75 1 A  
Control I/O Voltage-High VIH 2   Vcc V  
Control I/O Voltage-Low VIL 0   0.7 V  
Inter-Channel Skew TSK     150 Ps  
RESETL Duration     10   Us  
RESETL De-assert time       100 ms  
Power On Time       100 ms  
Transmitter
Single Ended Output Voltage Tolerance   0.3   4 V 1
Common mode Voltage Tolerance   15     mV  
Transmit Input Diff Voltage VI 150   1200 mV  
Transmit Input Diff Impedance ZIN 85 100 115    
Data Dependent Input Jitter DDJ   0.3   UI  
Receiver
Single Ended Output Voltage Tolerance   0.3   4 V  
Rx Output Diff Voltage Vo 370 600 950 mV  
Rx Output Rise and Fall Voltage Tr/Tf     35 ps 1

Optical Parameters

Parameter Symbol Min Typ. Max Unit Ref.
Transmitter
Wavelength Assignment L0 1264.5 1271 1277.5 nm  
L1 1284.5 1291 1297.5 nm
L2 1304.5 1311 1317.5 nm
L3 1324.5 1331 1337.5 nm
Side-mode Suppression Ratio SMSR 30 - - dB  
Total Average Launch Power PT - - 4 dBm  
Average Launch Power, each Lane   -6 - 1 dBm  
Difference in Launch Power between any two Lanes (OMA)   - - 4 dB  
Optical Modulation Amplitude, each Lane OMA -5   +2 dBm  
Launch Power in OMA minus Transmitter and Dispersion Penalty (TDP), each Lane     -5   -     dBm  
TDP, each Lane TDP     2.3 dB  
Extinction Ratio ER 3.5 - - dB  
Transmitter Eye Mask Definition {X1, X2, X3, Y1, Y2, Y3} {0.25, 0.4,0.45, 0.25,0.28, 0.4}
Optical Return Loss Tolerance   - - 20 dB  
Average Launch Power OFF Transmitter, each Lane Poff     -30 dBm  
Relative Intensity Noise Rin     -128 dB/HZ 1
Optical Return Loss Tolerance   - - 12 dB  
Receiver
Damage Threshold THd 5     dBm 1
Average Power at Receiver Input, each Lane R -14   3 dBm  
Receive Electrical 3 dB upper Cut off Frequency, each Lane       12.3 GHz  
RSSI Accuracy   -2   2 dB  
Receiver Reflectance Rrx     -26 dB  
Receiver Power (OMA), each Lane   - - 3.5 dBm  
Receive Electrical 3 dB upper Cutoff Frequency, each Lane       12.3 GHz  
LOS De-Assert LOSD     -15 dBm  
LOS Assert LOSA -25     dBm  
LOS Hysteresis LOSH 0.5     dB  

Timing for Soft Control and Status Functions

Parameter Symbol Max Unit Conditions
Initialization Time t_init 2000 ms Time from power on1, hot plug or rising edge of Reset until the module is fully functional2
Reset Init Assert Time t_reset_init 2 μs A Reset is generated by a low level longer than the minimum reset pulse time present on the ResetL pin.
Serial Bus Hardware Ready Time t_serial 2000 ms Time from power on1 until module responds to data transmission over the 2-wire serial bus
Monitor Data Ready Time t_data 2000 ms Time from power on1 to data not ready, bit 0 of Byte 2, deasserted and IntL asserted
Reset Assert Time t_reset 2000 ms Time from rising edge on the ResetL pin until the module is fully functional2
LPMode Assert Time ton_LPMode 100 μs Time from assertion of LPMode (Vin:LPMode =Vih) until module power consumption enters lower Power Level
IntL Assert Time ton_IntL 200 ms Time from occurrence of condition triggering IntL until Vout:IntL = Vol
IntL Deassert Time toff_IntL 500 μs toff_IntL 500 μs Time from clear on read3 operation of associated flag until Vout:IntL = Voh. This includes deassert times for Rx LOS, Tx Fault and other flag bits.
Rx LOS Assert Time ton_los 100 ms Time from Rx LOS state to Rx LOS bit set and IntL asserted
Flag Assert Time ton_flag 200 ms Time from occurrence of condition triggering flag to associated flag bit set and IntL asserted
Mask Assert Time ton_mask 100 ms Time from mask bit set4 until associated IntL assertion is inhibited
Mask De-assert Time toff_mask 100 ms Time from mask bit cleared4 until associated IntlL operation resumes
ModSelL Assert Time ton_ModSelL 100 μs Time from assertion of ModSelL until module responds to data transmission over the 2-wire serial bus
ModSelL Deassert Time toff_ModSelL 100 μs Time from deassertion of ModSelL until the module does not respond to data transmission over the 2-wire serial bus
Power_over-ride or Power-set Assert Time ton_Pdown 100 ms Time from P_Down bit set 4 until module power consumption enters lower Power Level
Power_over-ride or Power-set De-assert Time toff_Pdown 300 ms Time from P_Down bit cleared4 until the module is fully functional3

Pin Descriptions

Pin Logic Symbol Name/Description Ref.
1   GND Ground 1
2 CML-I Tx2n Transmitter Inverted Data Input  
3 CML-I Tx2p Transmitter Non-Inverted Data output  
4   GND Ground 1
5 CML-I Tx4n Transmitter Inverted Data Output  
6 CML-I Tx4p Transmitter Non-Inverted Data Output  
7   GND Ground 1
8 LVTTL-I ModSelL Module Select  
9 LVTTL-I ResetL Module Reset  
10   VccRx +3.3V Power Supply Receiver 2
11 LVCMOS-I/O SCL 2-Wire Serial Interface Clock  
12 LVCMOS-I/O SDA 2-Wire Serial Interface Data  
13   GND Ground 1
14 CML-O Rx3p Receiver Inverted Data Output  
15 CML-O Rx3n Receiver Non-Inverted Data Output  
16   GND Ground 1
17 CML-O Rx1p Receiver Inverted Data Output  
18 CML-O Rx1n Receiver Non-Inverted Data Output  
19   GND Ground 1
20   GND Ground 1
21 CML-O Rx2n Receiver Inverted Data Output  
22 CML-O Rx2p Receiver Non-Inverted Data Output  
23   GND Ground 1
24 CML-O Rx4n Receiver Inverted Data Output  
25 CML-O Rx4p Receiver Non-Inverted Data Output  
26   GND Ground 1
27 LVTTL-O ModPrsL Module Present  
28 LVTTL-O IntL Interrupt  
29   VccTx +3.3V Power Supply Transmitter 2
30   Vcc1 +3.3V Power Supply 2
31 LVTTL-I LPMode Low Power Mode  
32   GND Ground 1
33 CML-I Tx3p Transmitter Inverted Data Output  
34 CML-I Tx3n Transmitter Non-Inverted Data Output  
35   GND Ground 1
36 CML-I Tx1p Transmitter Inverted Data Output  
37 CML-I Tx1n Transmitter Non-Inverted Data Output  
38   GND Ground 1

Ordering Information

Part Number Description
AB-QSFP+-2 40G QSFP+ 2KM LR4 LC Optical Transceiver
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