The Le79271 Next Generation Subscriber Line Interface Circuit (SLIC) device, in combination with an Le79238 SLAC device, implements a DSL friendly, high density 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. Additionally, the NGCC has integrated self-test and line-test capabilities to resolve faults to the line or line circuit.

Features & Benefits

• Designed to minimize POTS transients, optimizing CRC performance for triple play applications
• Best-in-class GR-844 equivalent testing
• Fully validated test primitives and host routines
• Guaranteed performance parameters
• Optimized for best-in-class density
• Monitor of two-wire interface voltages and currents supports:
• Voice transmission
• Internal ringing generation
• Programmable DC feed characteristic
• Current limited and independent of battery
• Selectable off-hook and ground-key thresholds
• Subscriber line diagnostics
• Leakage and loop resistance
• Line capacitance and bell capacitance
• Foreign voltage sensing
• Power cross and fault detection
• Supports 85 Vrms internal ringing
• Supports balanced and unbalanced ringing
• 3.3 V and battery supplies
• Supports two negative and one positive battery
• Dual battery operation for system power saving
• Automatic battery switching
• Intelligent thermal management
• Compatible with inexpensive protection networks
• Metering capable
• 12 kHz and 16 kHz
• Smooth polarity reversal
• Tip-open mode supports ground start signaling
• Integrated test load switch
• 5 REN with DC offset
  
• Features with Le79124 VCP
• 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 and integrated test capabilities

• IVD
• CO, DLC
• 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
LE79271MQC	QFN	28	GREEN	Tray	CONTACT ZARLINK	Production
LE79271MQCT	QFN	28	GREEN	TR	10-12 weeks	Production

Packaging Information

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

Technical Support

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