Silicon Labs' subscriber line interface circuits (SLICs) provide fully programmable parameters such as two-wire ac impedance, ring amplitude, ring waveshape and dc linefeed characteristics via a programmable DSP-based architecture that provides the flexibility and performance necessary to address the most demanding customers and service providers. These combined SLIC and codec solutions integrate a comprehensive set of telephony features including DTMF generation/decoding, FSK caller ID generation, GR-909 loop diagnostics, pulse metering and battery switching control. Select SLIC models include an integrated dc-dc controller that continuously adapts to the line voltage to minimize thermal dissipation and maximize power efficiency. All of Silicon Labs' SLICs are powered using a single 3.3 V supply and can be controlled using a standard PCM/SPI or GCI digital interface.
The ProSLIC can be easily configured to country-specific requirements such as ac impedance, ring frequency, ring cadence and ring waveform using a single hardware design and bill-of-materials.
Silicon Labs' SLICs' highly programmable feature set provides the flexibility to optimize performance across the broadest range of customer applications. All SLIC and codec parameters are 100% configurable using software programmable registers. Silicon Labs’ API accelerates and simplifies code development with a ready-made set of functions common to the ProSLIC family.
The ProSLIC’s complete integration of an analog telephony interface into a single low-voltage CMOS device enables designers to realize an extremely compact SLIC solution at an attractive price point. Availability of single, dual and quad channel devices offers the right balance between size and cost per channel.
Select SLICs incorporate an on-chip tracking dc-dc controller that eliminates the need for bulky, expensive high-voltage power supplies. The generated supply continuously adapts to the line conditions to minimize thermal dissipation and maximize power efficiency.