Description
The AD4C543 is composed of two isolated relays; one
normally open and one normally closed. Each relay has a
bi-directional, single-pole, single-throw contact. Completely
independent of its counterpart, each consists of an LED
driver that activates an integrated circuit, which in turn
drives a pair of DMOS transistors. These transistors are
protected with free-wheeling diodes that can handle up to
1.5A of inrush current, making the relay ideal for switching
lamps and highly inductive loads.
The AD4C543 comes standard in a compact 8 pin DIP
package making it ideal for high-density board applications.

Features
 1 Form A / 1 Form B Integrated in Single Package
 Low Input Control Current (2.5mA TYP)
 400mA Maximum Continuous Load Current (per Channel)
 Low On Resistance (1 TYP)
 High Isolation Voltage (up to 5kVRMS)
 Long Life / High Reliability
 RoHS / Pb-Free / REACH Compliant

Applications
 Meter Reading Systems
 Multiplexers
 Data Acquisition
 Medical Equipment
 Battery Monitoring
 Home / Safety Security Systems