Datasheet

MID400 — AC Line Monitor Logic-Out Device
©2005 Fairchild Semiconductor Corporation www.fairchildsemi.com
MID400 Rev. 1.0.4
April 2010
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
■
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
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.
Schematic Package Outlines
8
1
8
1
8
1
1
2
3
4 5
6
7
8
V
CC
AUX
V
0
GND
Equivalent Circuit
N/C
N/C