MB3793-37A Datasheet, PDF (1/21 Pages) Fujitsu Component Limited. – Power Voltage Monitoring IC with Watchdog Timer

FUJITSU SEMICONDUCTOR
DATA SHEET
DS04-27403-2E
ASSP For Power Supply Applications
BIPOLAR
Power Voltage Monitoring IC
with Watchdog Timer
MB3793-37A
s 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 applicaiton systems.
There is also a mask option that can detect voltages of 4.9 to 2.4 V in 0.1-V steps.
The model number is MB3793-37A corresponding to the detected voltage. The model number and package code
are as shown below.
Model No.
MB3793-37A
Package code
3793AF
Detection voltage
3.7 V
s FEATURES
• Precise detection of power voltage fall: ±2.5%
• Detection voltage with hysteresis
• Low power dispersion: ICC = 30 µA (reference)
• Internal dual-input watchdog timer
• Watchdog-timer halt function (by inhibition pin)
• Independently-set wacthdog and reset times
s PACKAGE
8-pin, Plastic SOP
8-pin, Plastic SOL
(FPT-8P-M01)
(FPT-8P-M02)