描述 Description

The L7582 Tip Ring Access Switch is a monolithic solid-state device that provides the switching functionality of a 2 form C switch.

The L7582 is designed to provide power ringing access to tip and ring in central office, digital loop carrier, private branch exchange, digitally added main line, and hybrid fiber coax/fiber-in-the-loop analog line card applications. An additional pair of solidstate contacts provides access to the telephone loop for line test access or message waiting in the PBX application.

特性 Features

■ Small size/surface-mount packaging

■ Monolithic IC reliability

■ Low impulse noise

■ Make-before-break, break-before-make operation

■ Clean, bounce-free switching

■ Low, matched ON-resistance

■ Built-in current limiting, thermal shutdown, and SLIC protection

■ 5 V only operation, very low power consumption

■ Battery monitor, all OFF state upon loss of battery

■ No EMI

■ Latched logic level inputs, no drive circuitry

■ Only one external protector required

Applications

■ Central office

■ DLC

■ PBX

■ DAML

■ HFC/FITL