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)
2.5G SFP CWDM 40 km
2.5G SFP BiDi 10 km
2.5G SFP 1310nm 20km
2.5G SFP 1310 nm 2 km
1.25G SFP EZX 1550 nm 120 km
1.25G SFP ZX 1550 nm 80 km
1.25G SFP EX 1550 nm 40 km
1.25G SFP 1550 nm 160 km
1.25G SFP EX 1310 nm 40 km
1.25G SFP 1310 nm 10 km
1.25G SFP SR 850 nm 300 m
1.25G SFP BX 4950 120 km
1.25G SFP BX 4950 80 km
1.25G SFP BX 3150 40 km
1.25G SFP BX 3149 20 km
1.25G SFP CWDM 4931 40 km
1.25G SFP CWDM 4931 20 km
1000M Copper SFP
10/100/1000M Copper SFP
10/100/1000M Copper SFP w/ Auto-Negotiation
10/100/1000M Copper SFP w/ Link Indicator
155M SFP 1550 nm 80 km
100M SFP BX 4931 20 km
155M SFP OC3 1310nm 15 km