1.25G SFP Optical Transceiver Single-Mode Single-Fiber 20km 1310/1550nm Bi-Directional LC Interface DDM TBC-3524-1L2/TBC-5324-1L2

Product Overview

TBC-3524-1L2 / TBC-5324-1L2 are high-performance, cost-effective 1.25G SFP optical transceivers designed for Gigabit Ethernet and other high-speed fiber optic networking applications. Using single-mode single-fiber (SMF) technology, the modules support transmission distances of up to 20km over a single optical fiber.

The two modules are designed to work as a complementary pair for bidirectional transmission over a single fiber.

TBC-3524-1L2 features a 1310nm FP laser transmitter with a 1550nm receiver, while TBC-5324-1L2 features a 1550nm DFB laser transmitter with a 1310nm receiver. Both modules use a PIN photodiode with an integrated transimpedance preamplifier (TIA) and limiting amplifier in the receiver section, providing reliable optical signal reception.

The modules feature a standard SFP form factor with a 20-pin connector and support hot-plugging for convenient installation and replacement without interrupting the network. The high-speed electrical interface uses low-voltage logic, with a nominal 100Ω differential impedance and AC coupling integrated within the module.

For reliable operation and system monitoring, the modules provide TX_DIS, TX_FAULT, and RX_LOS functions. TX_DIS allows the optical output to be disabled through an LVTTL high-level input, while TX_FAULT indicates a transmitter fault related to laser operation or safety. RX_LOS indicates loss of the incoming optical signal.

An integrated serial EEPROM enables access to transceiver monitoring and configuration information through the 2-wire SFP management interface. The interface uses the A0h address with a lower and upper memory area, supporting basic digital diagnostic information and additional module-specific data.

Key Features

• Up to 20 km transmission on SMF
• Up to1.25 Gbps
• 1310nm FP laser and 1550nm PIN receiver
• Single LC/SC receptacle optical interface compliant
• 2-wire interface for integrated Digital Diagnostic monitoring
• Hot pluggable
• Very low EMI and excellent ESD protection
• +3.3V power supply
• Power consumption less than 1.0W
• Operating case temperature: 0~+70°C
Applications

• High-speed storage area networks
• Computer cluster cross-connect
• Custom high-speed data pipes
Compliance

• Compliant with IEEE802.3ah 1000Base-BX
• Compliant with MSA SFF-8472
• Compliant with SFP MSA