LE79489-2
SLIC (Subscriber Line Interface Circuit)
Product is discontinued and not allowed for new designs.
Overview
| The Le79489-2 Subscriber Line Interface Circuit implements the basic telephone line interface functions, and enables the design of low cost, high performance, POTS line interface cards. |
Detailed Block Diagram
Features & Benefits
- Ideal for low power sensitive applications
- Low standby power (normal and reverse)
- Automatic on-chip battery switching
- On-chip thermal management
- On-chip thermal shutdown
- -20 V to -60 V battery operation
- Programmable current limit
- Programmable resistive feed
- Programmable loop-detect threshold
- Selectable overhead for metering applications
- Two-wire impedance set by single external impedance
- On-chip ring and test relay drivers and relay snubber circuits
- Polarity reversal (full transmission)
- Loop and ground-key detector
- Comparator for ring-trip detection
- Ground-start capability
- On-hook transmission
Applications
Typical Applications
- Integrated Access Devices (IADs)
- Network Interface Units (NIUs)
- Cable Modems
- DSL Modems
- Set Top/House Side Boxes
- Intelligent PBX
- Pair Gain
- FXS Cards
- Voice over ISDN or T1/E1
- Smart Residential Gateways
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