Alpha Bridge AQS28-F-05-A/SF28/4

Features

  • QSFP28 and SFP28 MSA compliant
  • Four independent full-duplex channels
  • Supports 103.1Gb/s aggregate bit rate
  • Up to 70m/ 100m with OM3/ OM4 MMF transmission
  • Operating case temperature: 0 to 70°C
  • Single 3.3V power supply
  • 4x25G electrical interface (OIF CEI-28G-VSR) for QSFP28 terminal
  • 25G electrical interface (OIF CEI-28G-VSR) for SFP28 terminal
  • Maximum power consumption of 2.5W for QSFP28 terminal and 1.0W for each SFP28 terminal
  • RoHS-6 compliant

Applications

  • 100G Ethernet
  • Infiniband EDR

Absolute Maximum Ratings

Parameter Symbol Min. Max. Units Note
Storage Temperature TS -40 85 °C  
Operating Case Temperature Top 0 70 °C  
Power Supply Voltage Vcc -0.5 3.6 V  
Relative Humidity (non-condensation) RH 0 85 %  

Recommended Operating Conditions

Parameter Symbol Min. Typical Max. Units Note
Operating Case Temperature Top 0   70 °C  
Power Supply Voltage Vcc 3.135 3.3 3.465 V  
Data Rate, each Lane (QSFP28)     25.78125      
Data Rate, each Module (SFP28)     25.78125      
Data Rate Accuracy   -100   100 ppm  
Pre-FEC Bit Error Ratio       5x10-5    
Post-FEC Bit Error Ratio   0   1x10-12   1
Control Input Voltage High   2   Vcc V  
Control Input Voltage Low   0   0.8 V  

Electrical Characteristics QSFP28 Terminal

Parameter Symbol Min Type Max Units Notes
Power Consumption       2.5 W  
Supply Current Icc     757 mA  
Transmitter (each Lane)
Overload Differential Voltage pk-pk TP1a 900     mV  
Common Mode Voltage (Vcm) TP1 -350   2850 mV 1
Differential Termination Resistance Mismatch TP1     10 % At 1MHz
Differential Return Loss (SDD11) TP1 See CEI-28G-VSR Section 13-19 dB  
Common Mode to Differential conversion and Differential to common Mode Conversion (SDC11, SCD11) TP1 See CEI-28G-VSR Section 13-20 dB  
Stressed Input Test TP1a See CEI-28G-VSR Section 13.3.11.2.1    
Receiver (each Lane)
Differential Voltage, pk-pk TP4     900 mV  
Common Mode Voltage (Vcm) TP4 -350   2850 mV 1
Common Mode Noise, RMS TP4     17.5 mV  
Differential Termination Resistance Mismatch TP4     10 % At 1MHz
Differential Return Loss (SDD22) TP4 See CEI-28G-VSR Section 13-19 dB
Common Mode to Differential conversion and Differential to common Mode Conversion (SDC22, SCD22) TP4 See CEI-28G-VSR Section 13-21 dB
Common Mode Return Loss (SCC22) TP4     -2 dB 2
Transition Time, 20 to 80% TP4 9.5     Ps  
Vertical Eye Closure (VEC) TP4     5.5 dB  
Eye Width at 10-15 probability (EW15) TP4 0.57     UI  
Eye Height at 10-15 probability (EH15) TP4 228     mV  

SFP28 Terminal

Parameter Symbol Min Type Max Units Notes
Power Consumption       1.0 W 1
Supply Current Icc     300 mA 1
Transmitter
Overload Differential Voltage pk-pk TP1a 900     mV  
Common Mode Voltage (Vcm) TP1 -350   2850 mV 2
Differential Termination Resistance Mismatch TP1     10 % At 1MHz
Differential Return Loss (SDD11) TP1 See CEI-28G-VSR Section 13-19 dB
Common Mode to Differential conversion and Differential to common Mode Conversion (SDC11, SCD11) TP1 See CEI-28G-VSR Section 13-20 dB
Stressed Input Test TP1a See CEI-28G-VSR Section 13.3.11.2.1
Receiver
Differential Voltage, pk-pk TP4     900 mV  
Common Mode Voltage (Vcm) TP4 -350   2850 mV 1
Common Mode Noise, RMS TP4     17.5 mV  
Differential Termination Resistance Mismatch TP4     10 % At 1MHz
Differential Return Loss (SDD22) TP4 See CEI-28G-VSR Section 13-19 dB
Common Mode to Differential conversion and Differential to common Mode Conversion (SDC22, SCD22) TP4 See CEI-28G-VSR Section 13-21 dB
Common Mode Return Loss (SCC22) TP4     -2 dB 3
Transition Time, 20 to 80% TP4 9.5     Ps  
Vertical Eye Closure (VEC) TP4     5.5 dB  
Eye Width at 10-15 probability (EW15) TP4 0.57     UI  
Eye Height at 10-15 probability (EH15) TP4 228     mV  

Pin Definition – QSFP28 Terminal

Pin Logic Symbol Description Notes
1   GND Ground 1
2 CML-I Tx2n Transmitter Inverted Data Input  
3 CML-I Tx2p Transmitter Non-inverted Data Input  
4   GND Ground 1
5 CML-I Tx4n Transmitter Inverted Data Input  
6 CML-I Tx4p Transmitter Non-inverted Data Input  
7   GND Ground 1
8 LVTTL-I ModSeIL 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  
14 CML-O Rx3p Receiver Non-Inverted Data Output  
15 CML-O Rx3n Receiver Inverted Data Output  
16   GND Ground 1
17 CML-O Rx1p Receiver Non-Inverted Data Output  
18 CML-O Rx1n Receiver 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-1 LPMode Low Power Mode  
32   GND Ground 1
33 CML-I Tx3p Transmitter Non-Inverted Data Input  
34 CML-I Tx3n Transmitter Inverted Data Input  
35   GND Ground 1
36 CML-I Tx1p Transmitter Non-Inverted Data Input  
37 CML-I Tx1n Transmitter Inverted Data Input  
38   GND Ground 1

Pin Description – SFP28 Terminal

Pin Logic Symbol Description Notes
1   VeeT Module Transmitter Ground 1
2 LVTTL-O TX_Fault Module Transmitter Fault  
3 LVTTL-I TX_Dis Transmitter Disable; Turns off transmitter laser output  
4 LVTTL-I/O SDA 2-Wire Serial Interface Data Line 2
5 LVTTL-I SCL 2-Wire Serial Interface Clock 2
6   MOD_DEF0 Module Definition, Grounded in the module  
7 LVTTL-I RS0 No connection required  
8 LVTTL-O   RX-LOS Receiver Loss of Signal Indication. Logic 0 indicates normal operation  
9 LVTTL-I RS1 No connection required  
10   VeeR Module Receiver Ground 1
11   VeeR Module Receiver Ground 1
12 CML-O RD- Receiver Inverted Data Output  
13 CML-O RD+ Receiver Data Output  
14   VeeR Module Receiver Ground 1
15   VccR Module Receiver 3.3 V Supply  
16   VccT Module Receiver 3.3 V Supply  
17   VeeT Module Transmitter Ground 1
18 CML-I TD+ Transmitter Non-Inverted Data Input  
19 CML-I TD- Transmitter Inverted Data Input  
20   VeeT Module Transmitter Ground 1

Ordering Information

Part Number Model Number Length (M) Voltage Temperature
   AQS28-F-05-A/SF28/4 Active Optical Cable 1 3.3V 0°C to 70 °C
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