MB3793-42PNF-G Datasheet, PDF (1/23 Pages) Fujitsu Component Limited. – POWER-VOLTAGE MONITORING IC WITH WATCHDOG TIMER

FUJITSU SEMICONDUCTOR
DATA SHEET
DS04-27402-4E
ASSP
POWER-VOLTAGE MONITORING IC
WITH WATCHDOG TIMER
MB3793-42
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 fail-safe function for various application systems.
There is also a mask option that can detect voltages of 4.9 to 2.4V in 0.1-V steps.
The model number and package code are as shown below.
Model No.
Package code
Detection voltage
MB3793-42
3793-A
4.2 V
s FEATURES
• Precise detection of power voltage fall: ±2.5%
• Detection voltage with hysteresis
• Low power dispersion: ICC = 27 µA (reference)
• Internal dual-input watchdog timer
• Watchdog timer halt function (by inhibition terminal)
• Independently-set watchdog and reset times
• Mask option for detection voltage (4.9 to 2.4 V, 0.1-V steps)
s PACKAGES
8-pin plastic DIP
8-pin plastic SOP
8-pin plastic SOP
(DIP-8P-M01)
(FPT-8P-M01)
(FPT-8P-M02)