MB3793-27A Datasheet, PDF (1/25 Pages) Fujitsu Component Limited. – Power Voltage Monitoring IC with Watchdog Timer

FUJITSU SEMICONDUCTOR
DATA SHEET
DS04-27404-3E
ASSP For Power Supply Applications
BIPOLAR
Power Voltage Monitoring IC
with Watchdog Timer
MB3793-27A
■ DESCRIPTION
The MB3793 is an integrated circuit to monitor power voltage; it incorporates a watchdog timer.
A reset signal is output when the power is cut or falls abruptly. When the power recovers normally after resetting,
a power-on reset signal is output to microprocessor units (MPUs). An internal watchdog timer with two inputs for
system operation diagnosis can provide a fall-safe function for various application systems.
There is also a mask option that can detect voltages of 4.9 to 2.4 V in 0.1-V steps.
■ FEATURES
• Precise detection of power voltage fall: ±2.5%
• Detection voltage with hysteresis
• Low power dispersion: ICC = 31 µA (reference)
• Internal dual-input watchdog timer
• Watchdog-timer halt function (by inhibition pin)
• Independently-set wacthdog and reset times
• Three types of packages (SOP-8pin : 2 types, SSOP-8pin : 1 type)
■ APPLICATION
• Arcade Amusement etc.
Copyright©1999-2006 FUJITSU LIMITED All rights reserved