L9217A Datasheet | Agere Systems

Features s Basic forward/reverse battery SLIC functionality at a low cost s Pin patible with Agere Systems Inc. L9218/ L9219 SLIC s Low active power (typical 154 m W during on-hook transmission) s Low-power scan mode for low-power, on-hook power dissipation (57 m W 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 ponents 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) patible s Thermal protection with thermal shutdown indication Description This general-purpose electronic subscriber loop...