Introduction

The Agere Systems Inc. L9312 is a combination full-feature, 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

■ 5 V and battery operation

■ Optional automatic battery switch

■ Four operational modes

■ Appropriate for 58 dB longitudinal balance applications

■ Minimal external components required at all interfaces

■ Ultralow power dissipation

■ Software/hardware adjustable dc parameters and supervision thresholds

Solid-State Ring Relay

■ Low impulse noise

■ Current-limited switches/thermal protection

Applications

■ Pair Gain

■ Digital Loop Carrier (DLC)

■ Central Office (CO)

■ Fiber-in-the-Loop (FITL)