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.

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)

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