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.

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)