BIDI 25G SFP28 Transceivers Tx1270 Rx1330nm 20km Optical Transceiver Module
25.78Gbps BIDI SFP28 Tx1270/Rx1330nm 20km Optical Transceiver Module
Ordering information
| Part Number | Product Description |
|
S-PB2523L20-CD |
SFP28,BIDI,Tx1270/Rx1330nm, 25.78Gbps, SM, 20km, 0ºC~+70ºC, With DDM |
Description
Springtek SFP28 BIDI transceivers are high performance, cost effective modules supporting data rate of 25.78Gbps and 20km transmission distance with SMF.
The transceiver consists of three sections: a DFB laser transmitter, a PIN photodiode integrated with a trans-impedance preamplifier (TIA) and MCU control unit.
The transceivers are compatible with SFP Multi-Source Agreement and SFF-8472 digital diagnostics functions.
Features
- Supports up to 25.78Gbps bit rates
- Hot-pluggable SFP+ footprint
- 1270nm DFB laser and PIN photodiode, Up to 20km for SMF transmission
- Compliant with SFP+ MSA and SFF-8472 with duplex LC receptacle
- Compatible with RoHS
- Single +3.3V power supply
- Real Time Digital Diagnostic Monitoring
- Compatible with RoHS
Applications
- 25GBASE-LR
Absolute Maximum Ratings
| Parameter | Symbol | Min | Typ | Max | Unit |
| Power Supply Voltage | Vcc | -0.5 | 4.5 | V | |
| Storage Temperature Range | Ts | -40 | +85 | °C | |
| Relative Humidity - Operating | RHO | 5 | 85 | % |
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 | 3.47 | V |
| Supply Current | Icc | 600 | mA | ||
| Data Rate | BR | - | 25.78 | - | Gbps |
Optical and Electrical Characteristics
| Parameter | Symbol | Min | Typical | Max | Unit | Notes | |
| Transmitter | |||||||
| Centre Wavelength | λc | 1260 | 1270 | 1280 | nm | ||
| Spectral Width(-20dB) | Δλ | 1 | nm | ||||
| Side-Mode Suppression Ratio | SMSR | 30 | - | dB | |||
| Average Output Power | Pout | 0 | 6 | dBm | 1 | ||
| Extinction Ratio | ER | 3.5 | dB | ||||
| Data Input Swing Differential | VIN | 180 | 850 | 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 | 1320 | 1330 | 1340 | nm | ||
| Receiver Sensitivity | -13 | dBm | 3 | ||||
| Receiver Overload | 2 | dBm | 3 | ||||
| LOS De-Assert | LOSD | -15 | dBm | ||||
| LOS Assert | LOSA | -30 | dBm | ||||
| LOS Hysteresis | 0.5 | dB | |||||
| Data Output Swing Differential | Vout | 300 | 900 | mV | 4 | ||
| LOS | High | 2.0 | Vcc | V | |||
| Low | 0.8 | V | |||||
|
Notes: 1. The optical power is launched into SMF. 2. PECL input, internally AC-coupled and terminated. 3. Measured with a PRBS 231-1 test pattern @25.78Gps, BER ≤5×10-5. 4. Internally AC-coupled. |
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Timing and Electrical
| Parameter | Symbol | Min | Typical | Max | Unit |
| Tx Disable Negate Time | t_on | 2 | 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 | 100 | 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 |
| Voltage | 3.0 to 3.6 | V | ±3% | Internal |
| Bias Current | 0 to 100 | mA | ±10% | Internal |
| TX Power | 0 to 6 | dBm | ±3dB | Internal |
| RX Power | -14 to +2 | dBm | ±3dB | Internal |
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