LE79271AMQCT

                    LE79271 Next Generation Carrier Chipset (NGCC) Subscriber Line Interface Circuit (SLIC)   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. Detailed Block Diagram Features & Benefits  Designed to minimize POTS transients, optimizing CRC performance for triple play applications  Best-in-class GR-844 equivalent testing o Fully validated test primitives and host routines o Guaranteed performance parameters  Optimized for best-in-class density  Monitor of two-wire interface voltages and currents supports: o Voice transmission o Internal ringing generation o Programmable DC feed characteristic  o Selectable off-hook and ground-key thresholds o Subscriber line diagnostics o  Leakage and loop resistance  Line capacitance and bell capacitance  Foreign voltage sensing Power cross and fault detection Supports balanced and unbalanced ringing 3.3 V and battery supplies o   Supports 85 Vrms internal ringing o  Current limited and independent of battery Supports two negative and one positive battery Dual battery operation for system power saving o Automatic battery switching o Intelligent thermal management  Compatible with inexpensive protection networks  Metering capable o 12 kHz and 16 kHz o Smooth polarity reversal  Tip-open mode supports ground start signaling  Integrated test load switch  5 REN with DC offset  Features with Le79124 VCP o 72 channel call aggregation o GR-844 equivalent line testing                                                                        https://www.microsemi.com/product‐directory/ve792‐next‐generation‐carrier‐chipset‐ngcc/4403‐le79271#support/5‐8‐19