Alpha Bridge AB-QSFP28-40

Features

  • Hot Pluggable QSFP28 form factor
  • Supports aggregate bit rate up to 103.125Gb/s LC Duplex optical interface
  • 4x25Gb/s LAN-WDM transmitter, EML laser, APD array detector
  • Operating case temperature:0 to 70 °C
  • Low power consumption <4.5W
  • Applicable for 40km SMF connection without FEC
  • All-metal housing for superior EMI performance
  • IIC management interface
  • Single +3.3V power supply RoHS compliant (lead free)

Applications

  • 100G Ethernet
  • Other optical links

Standards

  • SFF8436, SFF-8636
  • SFF-8665, SFF8661
  • IEEE 802.3ba

Description

The 40km 100GBase-LR4 QSFP28 transceiver is designed to meet the requirements of 100G ethernet links over SMF up to 40km. It is compliant with QSFP28 MSA, IEEE 802.3ba. It is cost-effective, low power consumption with a single 3.3V power supply. The module has an aggregate bit rate up to 103.125Gbps by multiplexing of 4 independent LAN-WDM optical lanes, each lane capable of transmitting 25.78125Gb/s over 40km SMF.

Absolute Maximum Ratings

Parameter Symbol Min Typ. Max Unit
Power Supply Voltage Vcc -0.5   3.6 V
Storage Temperature Range Ts -40   85 °C
Relative Humidity - Storage RHS 0   95 %
Relative Humidity - Operating RHO 0   85 %
Static electrical discharge (human body model) - 500 - - V

Recommended Operating Conditions

Parameter Symbol Min Typ. Max Unit
Case Operating Temperature Range Tc 0 - 70 °C
Power Supply Voltage Vcc 3.14 3.3 3.46 V
Total Power Consumption P - - 4.5 W
Data Rate per lane BR - 25.78125 - Gbps

Transmitter Electrical Characteristics

Parameter Symbol Min Typ. Max Unit
Differential Input Voltage Swing VIN 180 - 900 mV
Tx Differential Input Impendence ZIN - 100 - Ω
Differential input return loss   Per 100Gbase-ER4 dB
Common mode input return loss   Per 100Gbase-ER4 dB

Receiver Electrical Characteristics

Parameter Symbol Min Typ. Max Unit
Differential output Voltage Swing VOUT 300 - 1200 mV
Rx Differential Output Impendence ZOUT - 100 - Ω
Differential output return loss   Per 100Gbase-ER4 dB
Common mode output return loss   Per 100Gbase-ER4 dB

Optical Characteristics

Parameter Symbol Min Typ Max Unit Notes
Transmitter Characteristics
Laser Type   EML      
Data Rate per lane fD C - 25.78125 - Gb/s  
Aggregate Data Rate fD - 103.125 - Gb/s  
Signal Speed Variation from Nominal △fD -100 - 100 ppm  
Lane Center Wavelength Range λ 1294.53 - 1296.59 nm
1299.02 - 1301.09
1303.54 - 1305.63
1308.09 - 1310.19
Side Mode Suppression Ratio SMSR 30 - - dB  
Total Average launch Power PTOTA L - - 8.9 dBm  
Average Launch Power, each lane POUT - 2 - dBm  
Optical Modulation Amplitude (OMA), each lane POMA 0.1   4.5 dBm  
Launch Power in OMA minus TDP, each lane   -2.3 - - dBm  
Average Launch Power of OFF transmitter, each lane POFF - - -30 dBm  
Extinction Ratio ER 8 - - dB  
Transmit Reflectance RFL - - -12 dB  
Eye Diagram Complies with 100Gbase-LR4 eye masks when filtered
Receiver Characteristics
Receiver Type   APD  
Data Rate per lane   - 25.78125 - Gb/s  
Operating Central Wavelength λ 1294.53 - 1296.59 nm
1299.02 - 1301.09
1303.54 - 1305.63
1308.09 - 1310.19
Damage Threshold   5.5 - - dBm  
Receiver Sensitivity, each lane SenOMA - -19 - dBm 1
Average Receive Power, each lane - - 4.5 dBm  
Receiver Power, each lane (OMA) - - 4.5 dBm  
Receiver Reflectance RFL - - -26 dB  
LOS Assert LOSA -30 - - dBm  
LOS De-Assert LOSD - - -25 dBm  
LOS Hysteresis LOSH 0.5 3 5 dB  

Pin Definitions

Pin Symbol Name/Description Notes
1 GND Ground  
2 Tx2n Transmitter Inverted Data Input  
3 Tx2p Transmitter Non-Inverted Data Input  
4 GND Ground  
5 Tx4n Transmitter Inverted Data Input  
6 Tx4p Transmitter Non -Inverted Data Input  
7 GND Ground  
8 ModselL Module Select (Low active, pull-up in module)  
9 RetsetL Module Reset (Pull-up in module)  
10 VCC Rx +3.3V Power Supply Receiver  
11 SCL 2-wire serial interface clock  
12 SDA 2-wire serial interface data  
13 GND Ground  
14 Rx3p Receiver Non-Inverted Data Output  
15 Rx3n Receiver Inverted Data Output  
16 GND Ground  
17 Rx1p Receiver Non-Inverted Data Output  
18 Rx1n Receiver Inverted Data Output  
19 GND Ground  
20 GND Ground  
21 Rx2n Receiver Inverted Data Output  
22 Rx2p Receiver Non-Inverted Data Output  
23 GND Ground  
24 Rx4n Receiver Inverted Data Output  
25 Rx4p Receiver Non-Inverted Data Output  
26 GND Ground  
27 ModPrsL Module Present  
28 IntL Interrupt  
29 VCC Tx +3.3V Power Supply transmitter  
30 VCC1 +3.3V Power Supply  
31 LPMode Low Power Mode  
32 GND Ground  
33 Tx3p Transmitter Non-Inverted Data Input  
34 Tx3n Transmitter Inverted Data Input  
35 GND Ground  
36 Tx1p Transmitter Non-Inverted Data Input  
37 Tx1n Transmitter Inverted Data Input  
38 GND Ground  

Ordering Information

Part Number Product Description
AB-QSFP28-40 100Gbps QSFP28 LAN WDM4, LC, 40km, 0°C~+70°C, with DDM
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