MID400 AC Line Monitor Logic-Out Device

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MID400 AC Line Monitor Logic-Out Device

November 2006

MID400 AC Line Monitor Logic-Out Device
Features
Direct operation from any line voltage with the use of

Description
The MID400 is an optically isolated AC line-to-logic interface 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 isolation, solid state reliability, TTL compatibility, small size, low power, and low frequency operations are required.

an external resistor. Externally adjustable time delay Externally adjustable AC voltage sensing level High voltage isolation between input and output Compact plastic DIP package Logic level compatibility UL recognized (File E90700) VDE recognized (file 102915), add option V (e.g., MID400V)

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

Schematic

Package

1

8 VCC

8
N/C 2
7

AUX

1

3

6

V0

N/C 4

5 GND

8 1

8 1

Equivalent Circuit

2005 Fairchild Semiconductor Corporation

1

www.fairchildsemi.com

MID400 Rev. 1.0.1

MID400 Datasheet Fairchild Download PDF

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MID400 DATASHEET