L9312

Data Sheet July 2001 L9312 Line Interface and Line Access Circuit Forward Battery SLIC and Ringing Relay for TR-57 Applications Introduction The Agere Systems Inc. L9312 is a combination fullfeature, ultralow-power SLIC, and solid-state ringing access relay. It is part of a pin-for-pin compatible family of devices designed to serve a wide variety of applications. The L9312 is optimized for TR-57 access, forward battery only, applications. Features SLIC s 5 V and battery operation s Optional automatic battery switch s Four operational modes s Appropriate for 58 dB longitudinal balance applica- tions s Minimal external components required at all inter- faces s Ultralow power dissipation s Software/hardware adjustable dc parameters and supervision thresholds Solid-State Ring Relay s Low impulse noise s Current-limited switches/thermal protection Description The L9312 electronic line interface and line access circuit (LILAC) provides all the functions that are necessary to interface a c...