DESCRIPTION

The LH1529A and LH1529B Telecom switches consist of an optically coupled solid state relay (SSR) and a bidirectional input optocoupler. The SSR is ideal for performing switchhook and dial-pulse switching while the optocoupler performs ring detection and loop current sensing functions. Both the SSR and optocoupler provide 5300 VRMS of input to output isolation.

FEATURES

• Solid State Relay and Optocoupler in One Package

• Surface Mount Package

• l/O Isolation, 5300 VRMS

• LH1529A, CTR Min.=33

• LH1529B, CTR Min.=100

• Optocoupler

    – Bidirectional Current Detection

• Solid-state Relay

    – See LH1540 Data Sheet

    – Typical RON 20 Ω

    – Load Voltage 350 V

    – Load Current 120 mA

    – Current Limit Protection

APPLICATIONS

• General Telecom Switching

    – On/off Hook Control

    – Dial Pulse

    – Ring Current Detection

    – Loop Current Sensing

• See Appnote 56