LE79272
Next Generation Carrier Chipset (NGCC) Dual Subscriber Line Interface Circuit (SLIC)
Overview
We are transitioning to Microchip; this page will be directed to Le79272 product page at www.microchip.com.
| The Le79272 Next Generation Dual 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 (One Channel)
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
