L9219G

Data Sheet November 2001 L9219A/G Low-Cost Line Interface with Reverse Battery and Dual Current Limit Features s Basic forward/reverse battery SLIC functionality at a low cost s Pin compatible with Agere Systems Inc. L9217 and L9218 SLICs s Low active power (typical 138 mW during on-hook transmission) s Low-power scan mode for low-power, on-hook power dissipation (52 mW typical) s Distortion-free, on-hook transmission s Convenient operating states: — Forward active-low current limit — Forward active-high current limit — Reverse active-low current limit — Reverse active-high current limit — Low-power scan — Disconnect (high impedance) 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 Logic controlled high and low current limit s Ramped rate of battery reversal s Thermal protection with thermal shutdown indication Description This gener...