ASCENT’s SFP-AG-LP-85-05 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 VCSEL laser and the PIN photo-detector. The module data link up to 550 m in 50/125 µm multi-mode fiber. The optical output can be disabled by a TTL logic high- level input of Tx Disable, and the system also can disable the module via I2C. Tx Fault is provided to indicate that degradation of the laser. Loss of signal (LOS) output is provided to indicate the loss of an input optical signal of receiver or the link status with partner. The system can also get the LOS (or Link)/Disable/Fault information via I2C register access.
· Up to 1.25 Gb/s data links with DDM
· VCSEL laser transmitter and PIN photo-detector
· Hot-pluggable SFP footprint
· Duplex LC/UPC type pluggable optical interface
· Low power consumption
· Metal enclosure, for lower EMI
· RoHS compliant and lead-free
· Single +3.3V power supply
· Compliant with SFF-8472
· Link up to 550 m in 50/125 µm multi-mode fiber
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‑85‑05 | |
‑40 | 85 | SFP‑AG‑LP‑85‑05A | ||||
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 | 1250/1250 | Mbps | TX Rate/RX Rate | |||
Transmission Distance | 550 | M | ||||
Coupled Fiber | Multi‑mode fiber | 50/125 µm MMF |
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 | 830 | 850 | 860 | nm | VCSEL Laser |
Spectrum Bandwidth (RMS) | σ | 0.85 | 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 |
Notes
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 | 770 | 850 | 860 | nm | PIN‑TIA |
Receiver Sensitivity | PIN | ‑17 | dBm | 1 | ||
Input Saturation Power (Overload) | PSAT | 0 | dBm | |||
Loss Of Signal Assert | PA | ‑18 | 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 850nm, ER=9dB; BER =<10^‑12 @PRBS=2^7‑1 NRZ
2. When LOS de‑asserted, the RX data± 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 |
Notes
1. A (TX) + B (RX) = 280mA (Not include termination circuit)
Regulatory Compliance
Feature | Reference | Performance |
Electrostatic discharge(ESD) | IEC/EN 61000‑4‑2 | Compatible with standards |
Electromagnetic Interference (EMI) | FCC Part 15 Class B EN 55022 Class B (CISPR 22A) | Compatible with standards |
Laser Eye Safety | FDA 21CFR 1040.10, 1040.11 IEC/EN 60825‑1, 2 | Class 1 laser product |
Component Recognition | IEC/EN 60950 , UL | Compatible with standards |
ROHS | 2002/95/EC | Compatible with standards |
EMC | EN61000‑3 | Compatible with standards |
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