Alpha Bridge-ASFP-1G-SX
Product Overview
The SFP optical 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 ITIA) and 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 the SFP MSA.
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
- 550m transmission with 50/125µm MMF
- 300m transmission with 5/125µm MMF
- Single +3.3V power supply
- RoHS Compliant
- Operating case temperature: Class C: 0°C ~70°C
- Class I: -40°C ~85°C
Application
- Gigabit Ethernet
- Fiber Channel
- Switch to Switch interface
- Switched backplane applications
- Router/Server Interface
- Other optical transmission systems
Absolute Maximum Ratings
| Parameter | Symbol | Min | Max. | Units | Note |
| Storage Temperature | Ts | -40 | 85 | °C | |
| Supply Voltage | Vcc | -0.5 | 4.5 | V | |
| Operating Relative Humidity | 5 | Vcc | % |
Recommended Operating Conditions
| Parameter | Symbol | Min. | Typ. | Max. | Units | Note |
| Power Supply Voltage | Vcc | 3.13 | 3.3 | 3.47 | v | |
| Case Operating Temperature | Top | 0 | 70 | °C | CMF | |
| -40 | 85 | °C | IMF | |||
| Power Supply Current | Icc | 300 | mA | |||
| Data Rate | 1.25 | Gbps |
Digital Diagnostic Functions
| Parameter | Symbol | Accuracy | Unit | Notes |
| Temperature Monitor Absolute Error | DMI_Temp | ± 3 | °C | Over operating Temp |
| Supply Voltage Monitor Absolute Error | DMI_VCC | ±0.1 | V | Full operating range |
| RX Power Monitor Absolute Error | DMI_RX | ± 3 dB | dB | 1 |
| Bias Current Monitor | DMI_Ibias | ± 10% | mA | |
| Laser Power Monitor Absolute Error | DMI_TX | ± 3 dB | dB | 1 |
Optical Characteristics
| Parameter | Symbol | Min. | Typ. | Max. | Units | Note |
| Transmitter | ||||||
| Optical Center Wavelength | λ | 830 | 850 | 860 | nm | |
| Output Optical Power | PTX | -9.5 | -3.5 | dBm | 1 | |
| Extinction Ratio | ER | 9 | dB | |||
| Spectral Width (RMS) | Δλ | 0.85 | nm | |||
| Optical Rise/Fall Time (20%-80%) | tr/tf | 0.25 | Ns | |||
| Receiver | ||||||
| Optical Center Wavelength | λ | 770 | 860 | nm | ||
| Receiver Overload | POL | -3 | dBM | 2 | ||
| Receiver Sensitivity | PSEN | -18 | dBM | 2 | ||
| LOS Assert | LOSA | -35 | dBM | |||
| LOS De-assert | LOSD | -18 | dBM | |||
| LOS Hysteresis | LOSH | 1 | 4 | dB | ||
Electrical Characteristics
| Parameter | Symbol | Min. | Typ. | Max. | Units | Note |
| Transmitter | ||||||
| Input Differential Impedance | ZIN | 90 | 100 | 110 | Ω | |
| Single Ended Data Input Swing | VIN_pp | 400 | 1800 | mV | 1 | |
| Transmit Disable Voltage | VD | 2 | Vcc | V | ||
| Transmit Enable Voltage | VEN | 0 | 0.8 | V | ||
| Receiver | ||||||
| Data Output Swing Differential | VOUT | 400 | 1800 | mV | 2 | |
| Data Output Rise/Fall Time (20%~80%) | tr/tf | 300 | ps | |||
| LOS | High | 2 | Vcc | V | ||
| Low | 0.8 | V | ||||
Pin Descriptions
| Pin | Symbol | Function/Description | Note |
| 1 | VEET | Transmitter ground (common with receiver ground) | 1 |
| 2 | TX_FAULT | Transmitter Fault. Not supported Transmitter Disable. Laser output disabled on high | |
| 3 | TX DISABLE | or open | 2 |
| 4 | MOD_DEF(2) | Module Definition 2. Data line for serial ID | 3 |
| 5 | MOD_DEF(1) | Module Definition 1. Clock line for serial ID | 3 |
| 6 | MOD_DEF(0) | Module Definition 0. Grounded within the module | 3 |
| 7 | Rate Select | No connection requiredLoss of Signal indication. Logic 0 indicates normal | |
| 8 | LOS | operation | 4 |
| 9 | VEER | Receiver ground (common with transmitter ground) | 1 |
| 10 | VEER | Receiver ground (common with transmitter ground) | 1 |
| 11 | VEER | Receiver ground (common with transmitter ground) | 1 |
| 12 | RD- | Receiver Inverted DATA out. AC coupled | |
| 13 | RD+ | Receiver Non-inverted DATA out. AC coupled | |
| 14 | VEER | Receiver ground (common with transmitter ground) | 1 |
| 15 | VCCR | Receiver power supply | |
| 16 | VCCT | Transmitter power supply | |
| 17 | VEET | Transmitter ground (common with receiver ground) | 1 |
| 18 | TD+ | Transmitter Non-Inverted DATA in. AC coupled | |
| 19 | TD- | Transmitter Inverted DATA in. AC coupled | |
| 20 | VEET | Transmitter ground (common with receiver ground) | 1 |
Ordering Information
| Model Number | Part Number | Wavelength | Temperature |
| ASFP-1G-SX | OP6C-MX5-85-CMF | 850nm | 0°C ~70 °C |
| ASFP-1G-SX-I | OP6C-MX5-85-IMF | 850nm | -40 °C ~85 °C |
