Description

The LH1540 is robust, ideal for telecom and ground fault applications. It is a SPST normally open switch (Form A) that replaces electromechanical relays in many applications. It is constructed using a GaAIAs LED for actuation control and an integrated monolithic die for the switch output. The die, fabricated in a highvoltage dielectrically isolated technology, is comprised of a photodiode array, switch control circuitry and MOSFET switches. In addition, it employs current-limiting circuitry which meets FCC 68.302 and other regulatory voltage surge requirements when overvoltage protection is provided.

Features

• Current Limit Protection

• Isolation Test Voltage 5300 VRMS

• Typical RON 20 Ω, max 25 Ω

• Load Voltage 350 V

• Load Current 120 mA

• High Surge Capability

• Clean Bounce Free Switching

• Low Power Consumption

• High Reliability Monolithic Detector

• SMD lead available on tape and reel

• Lead-free component

• Component in accordance to RoHS 2002/95/EC and WEEE 2002/96/EC

Applications

    General Telecom Switching

        - On/off Hook Control

        - Ring Delay

        - Dial Pulse

        - Ground Start

        - Ground Fault Protection

    Instrumentation

    Industrial Controls

    See Solid State Relays (Application Note 56)