Alpha Bridge ASFP-1G-LX-I

Features

• Dual data-rate of 1.25Gbps/1.063Gbps operation
• 1310nm FP laser and PIN photodetector for 20km transmission
• Compliant with SFP MSA and SFF-8472 with duplex LC receptacle
• Digital Diagnostic Monitoring: Internal Calibration or External Calibration
• Compatible with SONET OC-24-LR-1
• Compatible with RoHS
• +3.3V single power supply
• Operating case temperature: Industrial: -40 to +85°C

Applications

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

Description

The SFP transceivers are high-performance, cost-effective modules supporting dual data rate of 1.25Gbps/1.0625Gbps and 20km transmission distance with SMF.
The transceiver consists of three sections: an FP laser transmitter, a PIN photodiode integrated with a trans-impedance preamplifier (TIA> and an MCU control unit. All modules satisfy class I laser safety requirements.
The transceivers are compatible with the 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 0 +70 °C
Industrial -40 +85 °C
Power Supply Voltage Vcc 3.13 3.3 3.47 V
Power Supply Current Icc 300 mA
Data Rate Gigabit Ethernet 1.25 Gbps
Fiber Channel 1.063

Optical and Electrical Characteristics

Parameter Symbol Min Typical Max Unit Notes
Transmitter
Centre Wavelength λc 1260 1310 1360 nm
Spectral Width (RMS) ∆λ 4 nm
Average Output Power Pout -9 -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 1260 1580 nm
Receiver Sensitivity -23 dBm 3
Receiver Overload -3 dBm 3
LOS De-Assert LOSD -24 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
-40 to +85
Voltage 3.0 to 3.6 V ±3% Internal / External
Bias Current 0 to 100 mA ±10% Internal / External
TX Power -9 to -3 dBm ±3dB Internal / External
RX Power -23 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
ASFP-1G-LX-I 1.25G 1310nm 10km LC SFP DDM -40ºC ~ +85ºC
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