MID400

AC LINE MONITOR LOGIC-OUT DEVICE MID400 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. 8 1 8 1 8 1 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) N/C 4 1 8 VCC N/C 2 7 AUX 3 6 V0 5 GND Equivalent Circuit 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 © 2003 Fairchild Semiconductor Corporation Page 1 of 11 7/24/03 AC LINE MONITOR LOGIC-OUT DEVICE MID400 ABSOLUTE MAXIMUM RATINGS Rating EMITTER RMS Current DC Curren...