Data Sheet

MID400 AC Line Monitor Logic-Out Device

MID400 AC Line Monitor Logic-Out Device Rev. 1.1 1

September 2016

MID400

AC Line Monitor Logic-Out Device

Features

• Direct operation from any line voltage with the use of

an external resistor.

• Externally adjustable time delay

• Externally adjustable AC voltage sensing level

• Logic level compatibility

• Safety and Regulatory Approvals:

– UL1577, 2,500 VAC

RMS

for 1 Minute

– DIN-EN/IEC60747-5-5, 630 V Peak Working

Insulation Voltage

Applications

• Monitoring of the AC/DC “line-down” condition

• “Closed-loop” interface between electromechanical

elements such as solenoids, relay contacts, small

motors, and microprocessors

• Time delay isolation switch

Description

The MID400 is an optically isolated AC line-to-logic inter-

face device. It is packaged in an 8-lead plastic DIP. The

AC line voltage is monitored by two back-to-back GaAs

LED diodes in series with an external resistor. A high

gain detector circuit senses the LED current and drives

the output gate to a logic low condition.

The MID400 has been designed solely for the use as an

AC line monitor. It is recommended for use in any AC-to-

DC control application where excellent optical iso- lation,

solid state reliability, TTL compatibility, small size, low

power, and low frequency operations are required.

Functional Schematic Package Outlines

4 5

$8;

*1'

1&

Figure 1. Schematic Figure 2. Package Outlines