LE79231
Intelligent Subscriber Line Interface Circuit (SLIC) - Single
Product is discontinued and not allowed for new designs.
Overview
The Le79231 Intelligent Subscriber Line Interface Circuit (ISLIC?) device, in combination with an Le79228x ISLAC? device, implements the telephone line interface function. This enables the design of a low cost, high performance, fully software programmable line interface for multiple applications worldwide. |
Typical Applications
- Enables a cost effective voice solution for long or short loop applications providing POTS and integrated test capabilities
- CO
- DLC
- PBX/KTS
- Pair Gain
Features & Benefits
- Monitor of two-wire interface voltages and currents supports
- Voice transmission
- Programmable DC feed characteristics
- Independent of battery
- Current limited
- Selectable off-hook and ground-key thresholds
- Subscriber line diagnostics
- Leakage resistance
- Loop resistance
- Line capacitance
- Bell capacitance
- Foreign voltage sensing
- Power cross and fault detection
- Ring relay driver for external ringing
- +5 V and battery supplies
- Dual battery operation for system power saving
- Automatic battery switching
- Intelligent thermal management
- Compatible with inexpensive protection networks
- Accommodates low tolerance fuse resistors or PTC thermistors
- Metering capable
- 12 kHz and 16 kHz
- Smooth polarity reversal
- Tip-open state supports ground start signaling
- Integrated test load switches/relay drivers
- Space Saving Package Options (8 x 8 QFN)