LE792388TVCT [Microchip]

The LE792388 Next Generation Octal Subscriber Line Audio-processing Circuit (SLAC), in combination with the single channel LE79271 or dual LE79272 SLIC, implements a DSL friendly, high density 8-channel universal telephone line interface with wideband capability. This enables the design of a low cost, high performance, fully software programmable line interface with worldwide applicability. All AC, DC, and signaling parameters are programmable via a microprocessor interface. The LE792388 has an integrated test tool box which can be used standalone or for high density line cards you can offload a lot of the basic call control and test functions to the LE79124 or LE79128 VCP to help manage calls or resolve faults to the line or line circuit. A full API is available to run on a host processor to simplify software integration.

Low Density Chip Set:
Octal SLAC (codec) + Long Loop SLICs
Le792388 (codec) + Le79271 (SLIC) / Le79272 (Dual SLIC)
ZL792588 (codec with External/ Internal Ringing) + Le79271 (SLIC) / Le79272 (Dual SLIC)

Optimized for Next Generation Broadband xDSL and triple play applications
• Eliminates transients that could cause CRC errors

Best-in-class GR-844 equivalent testing capability

Ideal for high density, medium and large line count applications

API-compatible with VE790 Series designs

High performance digital signal processor provides programmable control of all major line card functions
• A-law/µ-law and linear codec/filter
• Transmit and receive gain, Two-wire AC impedance, Transhybrid balance, Equalization
• DC loop feeding
• Loop supervision
• Internal ringing generation and integrated ring-trip detection
• Metering generation at 12 kHz and 16 kHz Envelope shaping and level control
• Envelope shaping and level control

Enhanced line control and line-test support
• DTMF and Modem Tone Detection
• GR-909 and GR-844 Line and circuit testing capability
• Tone generation (DTMF, FSK, and arbitrary tone)

Standard PCM and MPI digital interfaces

General purpose I/O pins, can be used as relay drivers

Features with Le79124 or LE79128 VCP
• 72 to 128 channel call aggregation
• GR-844 equivalent line testing