PON-X chipset enables FTTR deployments

Joining Semtech’s PON-X lineup are a combo chip and a burst-mode TIA, designed for 2.5G PON Fiber to the Room (FTTR) applications. FTTR is regarded as the next step in fixed broadband technology, gaining traction in both residential and business markets. As demand for higher speeds grows, Semtech’s FTTR chipset can be easily upgraded to 10G PON without recabling.

The GN25L81 integrates a 2.5-Gbps directly modulated laser (DML) driver and a dual-rate 2.5/1.25-Gbps burst-mode limiting amplifier into a single combo chip, suited for both FTTR and GPON optical line terminal (OLT) applications. The laser driver features dual-loop extinction ratio control and eye shaping.

Complementing the GL25L81, the GN25L42 is a single-channel, reset-less 2.5-Gbps burst-mode TIA that offers low-noise performance and sensitivity better than -30 dBm when used with a PIN photodiode. It also integrates a burst-mode received signal strength indicator (RSSI) output for cost-effective diagnostics of receiver input power.

The GN25L81 combo chip is in production and available in a QFN package. The GN25L42 burst-mode TIA is sampling now and supplied as bare die.

GN25L81 product page

GN25L42 product page

Semtech

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