
Status: In Production
The SY88432L is a low power transceiver device that integrates a 4.25Gbps FP/DFB laser diode driver with a wide-sensitivity limiting post amplifier. This low power device is designed for use in fiber-optic optical modules for multi-rate applications up to 4.25Gbps. The SY88432L transmitter section can output up to 60mA of modulation current with fast rise and fall times and is designed to be AC-coupled to the laser. The transmitter output stage incorporates a transmit disable feature and integrated 50Ω input impedance referenced to VCC. The receiver section’s limiting post amplifier connects to a typical trans-impedance amplifier (TIA) to amplify the incoming weak signal from the ROSA and outputs normalized received data in CML format at the output. The receiver offers a wide LOS (loss of signal) range and is able to detect input signals of as low as 5mVpp and as high as 80mVpp. A programmable loss-of-signal level set pin (LOSLVL) sets the sensitivity of the input amplitude detection. The LOS or SD (signal-detect) is user selectable and the LOS/SD signal can be fed back to the JAM input to implement the SQUELCH function that maintains output stability under a loss-of-signal condition. The receiver input should be AC-coupled. The SY88432L interfaces with Micrel’s highly advanced optical module controller MIC3003 as an easy-to-use chipset solution for CSFP/SFP/CSFF/SFF optical module applications. The MIC3003 allows for both modulation and bias current control, with automatic power control (APC) and temperature compensation. The SY88432L operates on a single 3.3V power supply and is available in a 24 lead, 4mm x 4mm QFN package.
Development tools data is currently unavailable.
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