ASCENT’s SFP-AG-LP-31-20 Small Form Factor Pluggable (SFP) transceivers are compatible with the Small Form Factor Pluggable Multi-Sourcing Agreement (MSA). The transceiver consists of five sections: the LD driver, the limiting amplifier, the digital diagnostic monitor, the 1310nm FP laser and the PIN/TIA. The module data link up to 20 km in 9/125 µm Single-mode fiber.
• Up to 1.25 Gb/s data links
• FP laser transmitter and PIN photo-detector
• Up to 20 km on 9/125 µm SMF
• Hot-pluggable SFP footprint
• Duplex LC/UPC type pluggable optical interface
• Low power dissipation
• Metal enclosure, for lower EMI
• RoHS compliant and lead-free
• Single +3.3V power supply
• Support Digital Diagnostic Monitoring interface
• Compliant with SFF-8472
• Switch to Switch Interface
• Gigabit Ethernet
• Switched Backplane Applications
• Router/Server Interface
• Other Optical Links
Absolute Maximum Ratings
Parameter | Symbol | Min. | Typ. | Max. | Unit | Note |
Storage Temperature | Ts | ‑40 | 85 | °C | ||
Relative Humidity | RH | 5 | 95 | % | ||
Power Supply Voltage | VCC | ‑0.5 | 4 | V | ||
Signal Input Voltage | ‑0.3 | VCC+0.3 | V | |||
Receiver Damage Threshold | +5 | dBm |
Recommended Operating Conditions
Parameter | Symbol | Min. | Typ. | Max. | Unit | Note |
Case Operating Temperature | Tcase | 0 | 70 | °C | SFP‑AG‑LP‑31‑20 | |
‑10 | 80 | SFP‑AG‑LP‑31‑20E | ||||
‑40 | 85 | SFP‑AG‑LP‑31‑20A | ||||
Power Supply Voltage | VCC | 3.13 | 3.3 | 3.47 | V | |
Power Supply Current | ICC | 280 | mA | |||
Power Supply Noise Rejection | 100 | mVp‑p | 100 Hz to 1 MHz | |||
Data Rate | 1.25/1.25 | Gbps | TX Rate/RX Rate | |||
Transmission Distance | 20 | km | ||||
Coupled Fiber | Single‑mode fiber | 9/125 µm SMF |
Transmitter Specifications
Parameter | Symbol | Min. | Typ. | Max. | Unit | Note |
Average Output Power | POUT | ‑9 | ‑3 | dBm | 1 | |
Extinction Ratio | ER | 9 | dB | |||
Center Wavelength | λC | 1270 | 1310 | 1360 | nm | FP Laser |
Spectrum Bandwidth (RMS) | σ | 3.5 | nm | |||
Transmitter OFF Output Power | POff | ‑45 | dBm | |||
Differential Line Input Impedance | RIN | 90 | 100 | 110 | Ω | |
Output Eye Mask | Compliant with IEEE802.3 z (class 1 laser safety) | 2 |
Note
1. Measure at 2^7‑1 NRZ PRBS pattern.
2. Transmitter eye mask definition
Receiver Specifications
Parameter | Symbol | Min. | Typ. | Max. | Unit | Note |
Input Optical Wavelength | λIN | 1270 | 1610 | nm | PIN‑TIA | |
Receiver Sensitivity | PIN | ‑20 | dBm | 1 | ||
Input Saturation Power (Overload) | PSAT | ‑3 | dBm | |||
Loss Of Signal Assert | PA | ‑22 | dBm | |||
Loss Of Signal De‑assert | PD | ‑35 | dBm | 2 | ||
LOS Hysteresis | PA‑PD | 0.5 | 2 | 6 | dB |
Notes
1. Measured with Light source 1310nm, ER=9dB; BER =<10^‑12 @PRBS=2^7‑1 NRZ.
2. When SD De‑Assert, the RX‑LOS output is High‑level (fixed).
Electrical Interface Characteristics
Parameter | Symbol | Min. | Typ. | Max. | Unit | Note |
Transmitter | ||||||
Total Supply Current | ICC | A | mA | 1 | ||
Transmitter Disable Input‑High | VDISH | 2 | VCC+0.3 | V | ||
Transmitter Disable Input‑Low | VDISL | 0 | 0.8 | V | ||
Transmitter Fault Input‑High | VTxFH | 2 | VCC+0.3 | V | ||
Transmitter Fault Input‑Low | VTxFL | 0 | 0.8 | V | ||
Receiver | ||||||
Total Supply Current | ICC | B | mA | 1 | ||
LOSS Output Voltage‑High | VLOSH | 2 | VCC+0.3 | V | LVTTL | |
LOSS Output Voltage‑Low | VLOSL | 0 | 0.8 | V |
Note
1. A (TX) + B (RX) = 280mA (Not include termination circuit)
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