Alpha Bridge AB-GE-055 Datasheet

Features

  • Data-rate of 25Gbps operation
  • 850nm VCSEL laser and PIN photodetector
  • Compliant with SFP MSA and SFF-8472 with duplex LC receptacle
  • Digital Diagnostic Monitoring: Internal Calibration or External Calibration
  • 500m transmission with 50/125µm MMF
  • 300m transmission with 5/125µm MMF
  • Compatible with RoHS
  • +3.3V single power supply
  • Operating case temperature:
  • Standard: 0 to +70°C Extended: -40 to +85°C

Applications

  • Gigabit Ethernet
  • Fiber Channel
  • Switch to Switch interface
  • Switched backplane applications
  • Router/Server interface
  • Other optical transmission systems

Product Description

The SFP transceivers are high-performance, cost-effective modules supporting data-rate of 1.25Gbps and 550m transmission distance with MMF.

The transceiver consists of three sections: a VCSEL laser transmitter, a PIN photodiode integrated with a trans-impedance preamplifier (TIA) and MCU control unit. All modules satisfy class I laser safety requirements.

The transceivers are compatible with SFP Multi-Source Agreement (MSA) and SFF-8472. For further information, please refer to SFP MSA.

Absolute Maximum Ratings

Parameter Symbol Min Max Unit
Supply Voltage Vcc -0.5 4.5 V
Storage Temperature Ts -40 +85 °C
Operating Humidity - 5 85 %

Recommended Operating Conditions

Parameter Symbol Min Typical Max Unit
  Operating Case Temperature Standard   Tc +70 °C
Extended -20 +85 °C
Power Supply Voltage Vcc 3.13 3.3 3.47 V
Power Supply Current Icc     300 mA
Data Rate     1.25   Gbps

Electrical Characteristics

Parameter Symbol Min Typical Max Unit Notes
Transmitter
Centre Wavelength λc 830 850 860 nm  
Spectral Width (RMS) ∆λ     0.85 nm  
Average Output Power Pout -9.5   -3 dBm 1
Extinction Ratio ER 9     dB  
Optical Rise/Fall Time (20%~80%) tr/tf     0.26 ns  
Data Input Swing Differential VIN 400   1800 mV 2
Input Differential Impedance ZIN 90 100 110 Ω  
  TX Disable Disable   2.0   Vcc V
Enable   0   0.8 V  
  TX Fault Fault   2.0   Vcc V
Normal   0   0.8 V  
Receiver
Centre Wavelength λc 770   860 nm  
Receiver Sensitivity       -18 dBm 3
Receiver Overload   -3     dBm 3
LOS De-Assert LOSD     -20 dBm  
LOS Assert LOSA -30     dBm  
LOS Hysteresis   1   4 dB  
Data Output Swing Differential Vout 400   1800 mV 4
LOS High 2.0   Vcc V  
Low   0.8 V    

Timing and Electrical

Parameter Symbol Min Typical Max Unit
Tx Disable Negate Time t_on     1 ms
Tx Disable Assert Time t_off     10 µs
Time To Initialize, including Reset of Tx Fault t_init     300 ms
Tx Fault Assert Time t_fault     100 µs
Tx Disable To Reset t_reset 10     µs
LOS Assert Time t_loss_on     100 µs
LOS De-assert Time t_loss_off     100 µs
Serial ID Clock Rate f_serial_clock     400 KHz
MOD_DEF (0:2)-High VH 2   Vcc V
MOD_DEF (0:2)-Low VL     0.8 V

Diagnostics

Parameter Range Unit Accuracy Calibration
Temperature 0 to +70   °C   ±3°C   Internal / External
-20 to +85
Voltage 3.0 to 3.6 V ±3% Internal / External
Bias Current 0 to 100 mA ±10% Internal / External
TX Power -9.5 to -3 dBm ±3dB Internal / External
RX Power -22 to -3 dBm ±3dB Internal / External

Pin Descriptions

Pin Signal Name Description Plug Seq. Notes
1 VEET Transmitter Ground 1  
2 TX FAULT Transmitter Fault Indication 3 Note 1
3 TX DISABLE Transmitter Disable 3 Note 2
4 MOD_DEF(2) SDA Serial Data Signal 3 Note 3
5 MOD_DEF(1) SCL Serial Clock Signal 3 Note 3
6 MOD_DEF(0) TTL Low 3 Note 3
7 Rate Select Not Connected 3  
8 LOS Loss of Signal 3 Note 4
9 VEER Receiver ground 1  
10 VEER Receiver ground 1  
11 VEER Receiver ground 1  
12 RD- Inv. Received Data Out 3 Note 5
13 RD+ Received Data Out 3 Note 5
14 VEER Receiver ground 1  
15 VCCR Receiver Power Supply 2  
16 VCCT Transmitter Power Supply 2  
17 VEET Transmitter Ground 1  
18 TD+ Transmit Data In 3 Note 6
19 TD- Inv. Transmit Data In 3 Note 6
20 VEET Transmitter Ground 1  

Ordering Information

Part Number Product Description
AB-GE-055 1.25Gbps, 850nm, 550m,DDM, 0ºC ~ +70ºC
AB-GE-055-I 1.25Gbps, 850nm, 550m,DDM,-40ºC ~ +85ºC
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