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Highly integrated PON/SFP controller targets PON transceivers

Posted: 17 Dec 2008 ?? ?Print Version ?Bookmark and Share

Keywords:control monitoring PON? controller SFP? transceiver optic fiber?

Maxim Integrated Products introduces the DS1875 PON/SFP controller and monitor, which provides all the control and monitoring features required for PON transceivers, and the monitoring features for video control in triplexer applications.

The DS1875 employs a state-machine design, which eliminates the need for software development, thus simplifying design implementation and speeding time-to-market. Moreover, by integrating an APD boost converter, this device minimizes chip count in GPON applications. A complete monitoring solution, the DS1875 also integrates ten 13bit ADC channels, six DAC channels, a temperature sensor and 384bytes of user EEPROM (SFF-8472 compliant). It is ideal for PON triplexers, PON OLTs and LR SFPs.

The DS1875 also features a startup control loop that supports laser initialization in less than 5ns. The receive power (RSSI) monitor provides 29dB of dynamic range and programmable APD overload protection. DAC outputs for tracking error, laser bias, laser modulation and APD bias are automatically adjusted based on lookup table values indexed in the internal temperature sensor. Quick-trip monitors are included for complete laser eye-safety protection.

The DS1875 is fully specified over the -40C to +95C temperature range. It is available in a 5mm x 7mm, 38-pin TQFN package. Pricing begins at $2.50 (10,000-up, FOB USA).

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