L8574D Datasheet | Agere Systems

Data Sheet October 1998 L8574D Resistive Subscriber Line Interface Circuit (SLIC), Ring Relay, and Protector (SRP) for Long Loop and TR-57 Applications Features s Low-power scan mode for low on-hook power dissipation (55 mW max) s Low active power dissipation; talk or on-hook transmission (240 mW max) s Distortion-free on-hook transmission s Eight operating states via latched paralleled data inputs with channel select feature s Precision fixed 28 mA current limiter s Integrated protection s No external protection device required s Integrated ringing access relay s Ring trip detector s Loop closure detector with hysteresis s Relay driver s Battery noise cancellation s Thermal protection s...