The Le79238 Next Generation Octal Subscriber Line Audio processing Circuit (SLAC) device, in combination with the Le79271 SLIC device, implements a DSL friendly, high density eight-channel universal telephone line interface. 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 Le79238 has an integrated test tool box and uses VCP test primitives and Zarlink host routine capabilities to resolve faults to the line or line circuit.

Features & Benefits

• 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/#-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
• 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 NGVCP
  • 72 channel call aggregation
  • GR-844 equivalent line testing

Documentation

Errata

Design Manuals

Software Manuals

Product Previews

• VE792 Product Preview

Evaluation Boards

Reference Designs

Software URLs

• LE79124SLBT: VCP2-VP792 Code Load - Basic Test
• LE79124SLATP: VCP2-VP792 Code Load - Advanced Test with Calibration
• LE79124SLAT: VCP2-VP792 Code Load - Advanced Test

Typical Applications

Cost-effective voice solution for long or short loops providing POTS, IVD and integrated test capabilities

• POTS, IVD and integrated test capabilities
• IVD
• DLC
• CO
• Voice-enabled DSLAM
• PBX/KTS
• MSAP, MSAN

Product Packaging & Availability

Part Number	Package Type	Pin Count	Lead-Free Option	Shipping Option(s)	Lead Time(wks)	Status
LE792388TVC	LQFP	176	GREEN	Tray	10-12 weeks	Production
LE792388TVCT	LQFP	176	GREEN	TR	10-12 weeks	Production
LE792388VQC	QFN	164	GREEN	Tray	10-12 weeks	Production
LE792388VQCT	QFN	164	GREEN	TR	10-12 weeks	Production

Packaging Information

• Soldering Profiles
• Moisture Sensitivity
• Shelf Life
• Reliability Data

Technical Support

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