LE7942B
SLIC (Subscriber Line Interface Circuit)
Product is discontinued and not allowed for new designs.
Overview
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The Le7942B 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
- Programmable constant-current feed
- Receive current gain = 500
- Programmable loop-detect threshold
- Low standby power
- Performs polarity reversal
- Ground-key detector
- Pin for external ground-key noise filter capacitor
- Test relay driver option
- Compatible with Le7942 Device
- Tip Open state for ground-start lines
- -19 V to -58 V battery operation
- Ideal for PBX and KTS applications
- On-chip switching regulator for low-power dissipation
- Can be used with or without the on-chip switching regulator
- On-hook transmission
