MB3771 DIP

? DESCRIPTION
The Fujitsu MB3771 is designed to monitor the voltage level of one or two power supplies (+5 V and an arbitrary
voltage) in a microprocessor circuit, memory board in large-size computer, for example.
If the circuit?s power supply deviates more than a specified amount, then the MB3771 generates a reset signal to
the microprocessor. Thus, the computer data is protected from accidental erasure.
Using the MB3771 requires few external components. To monitor only a +5 V supply, the MB3771 requires the
connection of one external capacitor. The level of an arbitrary detection voltage is determined by two external
resistors. The MB3771 is available in an 8-pin Dual In-Line, Single In-Line Package or space saving Flat Package.
? FEATURES
? Precision voltage detection (VSA = 4.2 V ? 2.5 %)
? User selectable threshold level with hysterisis (VSB = 1.23 V ? 1.5 %)
? Monitors the voltage of one or two power supplies (5 V and an arbitrary voltage, >1.23 V)
? Usable as over voltage detector
? Low voltage output for reset signal (VCC = 0.8 V typ.)
? Minimal number of external components (one capacitor min.)
? Low power dissipation (ICC = 0.35 mA typ., VCC = 5 V)
? Detection threshold voltage has hysteresis function
? Reference voltage is connectable.