MID400 Datasheet, PDF (1/11 Pages) QT Optoelectronics – AC LINE MONITOR LOGIC-OUT DEVICE

AC LINE MONITOR
LOGIC-OUT DEVICE
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.
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
MID400
8
1
8
1
8
1
1
N/C 2
3
N/C 4
8 V_CC
7 AUX
6 V₀
5 GND
Equivalent Circuit
© 2003 Fairchild Semiconductor Corporation
Page 1 of 11
7/24/03