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Description

The L7583A/B/C/D Line Card Access Switch is a monolithic solid-state device providing the equivalent switching functionality of three 2 form C switches. The L7583 is designed to provide power ringing access, line test access (test out), and SLIC test access (test in) 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 solid state contacts are also available to provide access for testing of the ringing generator.

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 driver circuitry

■ Only one external protector required

Applications

■ Central office

■ DLC

■ PBX

■ DAML

■ HFC/FITL