FUJITSU SEMICONDUCTOR
DATA SHEET
DS04-27404-1E
ASSP For Power Supply Applications
BIPOLAR
Power Voltage Monitoring IC
with Watchdog Timer
MB3793
-27A
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.
s
FEATURES
•
•
•
•
•
•
Precise detection of power voltage fall:
±2.5%
Detection voltage with hysteresis
Low power dispersion: I
CC
= 31
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)
8-pin, Plastic SSOP
(FPT-8P-M02)
8-pin, Plastic DIP
(FPT-8P-M03)
(DIP-8P-M01)
FUJITSU [ FUJITSU COMPONENT LIMITED. ]
