$22.00 – $49.00
The HNSFP28-25G-SR transceivers are designed for 24.33Gbps and 25.78Gbps data rate over MMF and support up to 100m link length on OM4 and 70m link length on OM3. They are compliant to IEEE802.3by, SFF-8402, SFF-8432. Digital diagnostic monitoring interface compliant to SFF-8472 is available via an I2C interface.
| Parameter | Symbol | Min | Typical | Max | Unit | Notes |
| Transmitter | ||||||
| Center Wavelength | λt | 840 | 850 | 860 | nm | |
| Average Optical Power, 25GE | Pavg | -6 | – | 2.4 | dBm | |
| Optical Modulation Amplitude, 25GE | OMA | -3.2 | – | – | dBm | |
| OMA–TDP, 25GE | OMA_TDP | -4 | – | – | dBm | |
| Average Output Power (Laser Turn off) | POFF | – | – | -30 | dBm | |
| Spectral Width (RMS) | σ | – | 0.6 | nm | ||
| Extinction Ratio, 25GE | ER | 2 | – | – | dB | |
| Transmitter and Dispersion Penalty | TDP | – | – | 3.13 | dB | 1 |
| Optical Return Loss Tolerance | ORLT | – | – | 11 | dB | |
| Receiver | ||||||
| Center Wavelength | λr | 840 | 850 | 860 | nm | |
| Stressed OMA Sensitivity, 25GE | – | – | -5.2 | dBm | ||
| OMA Sensitivity, 25GE@1E-6 | PSEN_OMA | – | – | -10.2 | dBm | |
| Average Rx Sensitivity, 25GE@1E-6 | PSEN | – | – | -10.3 | dBm | |
| Receiver Overload | PIN-OL | 2.5 | – | – | dBm | |
| Reflectance | Ref | – | – | -12 | dB | |
| LOS Assert | LOSA | -30 | – | -17 | dBm | |
| LOS De-assert | LOSD | – | – | -17 | dBm | |
| LOS Hysteresis | LOSH | 0.5 | – | – | dB | |
Notes1: Measured with a PRBS 231-1 test pattern @25.78125 Gb/s.
| Parameter | Symbol | Min | Typical | Max | Unit | Notes | |
| Transmitter (Module Input) | |||||||
| Differential Data Input Amplitude | VIN,P-P | 100 | – | 900 | mVpp | ||
| Differential Input Impedance | Rin | – | 100 | – | Ω | ||
| Tx_Fault | Normal Operation | VIL | -0.3 | – | 0.4 | V | |
| TxFault | VIH | 2.4 | – | VCC+0.3 | V | ||
| Tx_Disable | Normal Operation | VIL | -0.3 | – | 0.8 | V | |
| Laser Disable | VIH | 2.0 | – | VCC+0.3 | V | ||
| Receiver (Module Output) | |||||||
| Differential Data Output Amplitude | VOUT,P-P | 450 | – | 900 | mVpp | ||
| Differential Output Impedance | Rout | – | 100 | – | Ω | ||
| Differential Termination Mismatch | – | – | ±5 | % | |||
| Output Rise/Fall Time, 20%~80% | TR | 9.5 | – | – | ps | ||
| Rx_LOS | Normal Operation | VOL | -0.3 | – | 0.4 | V | |
| Lose Signal | VOH | 2.4 | – | VCC+0.3 | V | ||
| Parameter | Range | Accuracy | Unit | Calibration |
| Temperature | -40 to 85 | ±3 | ºC | Internal |
| Voltage | 0 to VCC | ±5% | V | Internal |
| Tx Bias CurrentPer Lane | 0 to 100 | ±10% | mA | Internal |
| Tx Output Power Per Lane | -5 to +3 | ±3 | dBm | Internal |
| Rx Power (Each Lane) | -12to +2.5 | ±3 | dBm | Internal |
| Pin | Symbol | Name/Description | Note |
| 1 | VeeT | Transmitter Ground | 1 |
| 2 | Tx_Fault | Transmitter Fault – High indicates a fault condition | 2 |
| 3 | Tx_Disable | Transmitter Disable – High or open disables the transmitter | |
| 4 | SDA | 2-wire Serial Interface Data Line (MOD-DEF2) | 3 |
| 5 | SCL | 2-wire Serial Interface Clock (MOD-DEF1) | 3 |
| 6 | MOD_ABS | Module Absent, connected to VeeT or VeeR in the module | |
| 7 | RS0 | Rate Select 0 – Not used, Presents high input impedance | 5 |
| 8 | RX_LOS | Receiver Loss of Signal(LVTTL-O). Logic 0 indicates normal operation | 4 |
| 9 | RS1 | Rate Select 1 – Not used, Presents high input impedance | 5 |
| 10 | VeeR | Receiver Ground | 1 |
| 11 | VeeR | Receiver Ground | 1 |
| 12 | RD- | Inverse Received Data out (CML-O), AC Coupled | |
| 13 | RD+ | Receiver Non-inverted DATA out. AC Coupled | |
| 14 | VeeR | Receiver Ground | 1 |
| 15 | VccR | Receiver Power Supply | |
| 16 | VccT | Transmitter Power Supply | |
| 17 | VeeT | Transmitter Ground | 1 |
| 18 | TD+ | Transmitter Non-Inverted DATA in. AC Coupled. | |
| 19 | TD- | Transmitter Inverted DATA in. AC Coupled. | |
| 20 | VeeT | Transmitter Ground | 1 |
Notes:
| Part Number | Product Description |
| HNSFP28-25G-SRC | 850nm, 25Gbps, LC, 100m, 0°C~+70°C, with DDM |
| HNSFP28-25G-LR | 25G SFP28 1310nm 10km |
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