MB3793-42
Power-Voltage Monitoring IC with
Watchdog Timer
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.
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.
Cypress Semiconductor Corporation • 198 Champion Court
Document Number: 002-08515 Rev. *C
• San Jose, CA 95134-1709 • 408-943-2600
Revised June 28, 2017