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https://www.gearlinkoptic.com/products/sfp-1.25g-tx1550-rx1490-120km-lc-transceiver/

Agreement (MSA). The transceiver consists of five sections: the LD driver, the limiting amplifier, the digital diagnostic monitor, the 1490nm DFB laser (the 1550nm DFB laser), and the APD/TIA. The module data link up to 120km in 9/125um Single-mode fiber.

This transceiver meets the Small Form Pluggable (SFP) industry-standard package utilizing an integral LC-Bi-directional optical and bidi optics interface connector. An enhanced Digital Diagnostic Monitoring Interface compliant with SFF-8472 has been incorporated into the transceiver. It allows real-time access to the transceiver operating parameters such as transceiver temperature, laser bias current, transmitted optical power, received optical power, and transceiver supply voltage by reading a built-in memory with an I²C interface.

The optical output can be disabled by an LVTTL logic high-level input of Tx Disable, and the system also can disable the module via I²C. Tx Fault is provided to indicate the degradation of the laser. Loss of signal (LOS) output is provided to indicate the loss of an input optical signal of the receiver or the link status with the partner. The system can also get the LOS (or Link)/Disable/Fault information via I²C register access product Specifications

Technical Specification Of SFP 1.25G Tx1550/Rx1490 120Km LC Transceiver

General Specifications
Parameter
Symbol
Min
Typ.
Max
Unit

Bit Rate
BR

1.25
Gb/sec

Max.Supported Link Length
Max

120
km

Absolute Maximum Ratings
Parameter
Symbol
Min
Typ.
Max
Unit
Ref.

Storage Temperature
TS
-40

85
ºC

Storage Ambient Humidity
HA
5

95
%

Power Supply Voltage
VCC
-0.5

4
V

Signal Input Voltage

-0.3

Vcc+0.3
V

Receiver Damage Threshold

+3

dBm

Lead Soldering Temperature/Time
Told

260/10
ºC/sec
Note 1

Lead Soldering Temperature/Time
Told

360/10
ºC/sec
Note 2

Notes:
1. Suitable for wave soldering.
2. Only for soldering by iron.

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