MB3793-42 Datasheet, PDF (1/25 Pages) Fujitsu Component Limited. – POWER-VOLTAGE MONITORING IC WITH WATCHDOG TIMER

FUJITSU SEMICONDUCTOR
DATA SHEET
DS04-27402-5E
ASSP
BIPOLAR
POWER-VOLTAGE MONITORING IC
WITH WATCHDOG TIMER
MB3793-42
■ 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.
Marking Code
Detection voltage
MB3793-42
3793-A
4.2 V
■ 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)
• Two types of packages (SOP-8pin : 2 types)
■ APPLICATION
• Arcade Amusement
etc.
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