DESCRIPTION

The LH1540 relay is an SPST normally open switch (1 form A) in small-outline packages (SOP). It requires a minimal amount of LED drive current to operate, making them ideal for battery powered and power consumption sensitive applications.

The relays are constructed using a GaAlAs LED for actuation control and an integrated monolithic die for the switch output. The die, fabricated in a high-voltage dielectrically isolated BCDMOS technology, is comprised of a photodiode array, switch-control circuitry, and MOSFET switches. In addition, the relays employ current-limiting circuitry enabling it to pass lightning surge testing as per ANSI/TIA-968-B and other regulatory surge requirements when overvoltage protection is provided.

FEATURES

• High-speed operation

• Isolation test voltage 2500 VRMS

• Current-limit protection

• High surge capability

• Clean, bounce-free switching

• Extremely low power consumption

• High-reliability monolithic detector

• Surface-mountable

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

APPLICATIONS

• PCMCIA type 2 cards

• Battery powered switch applications

• General telecom switching

• Telephone line interface

   - On/off hook

   - Ring relay

   - Ground start

• Programmable controllers

• Instrumentation