Document
Data Sheet November 2001
L9217A/G Low-Cost Line Interface with Reverse Battery and PPM
Features
s Basic forward/reverse battery SLIC functionality at a low cost
s Pin compatible with Agere Systems Inc. L9218/ L9219 SLIC
s Low active power (typical 154 mW during on-hook transmission)
s Low-power scan mode for low-power, on-hook power dissipation (57 mW typical)
s Distortion-free, on-hook transmission
s Convenient operating states: — Forward powerup — Reverse powerup — Low-power scan — Disconnect (high impedance) — PPM operational states
s Minimal external components required
s Two gain options to optimize the codec interface
s Adjustable supervision functions: — Off-hook detector with hysteresis — Ring trip detector
s Adjustable loop current limit
s Adjustable overhead voltage
s Ramped rate of battery reversal
s Periodic pulse metering (PPM) compatible
s Thermal protection with thermal shutdown indication
Description
This general-purpose electronic subscriber loop inter.