MB3793-30A

www.DataSheet4U.com FUJITSU SEMICONDUCTOR DATA SHEET DS04-27406-3E ASSP For Power Supply Applications Power Voltage Monitoring IC with Watchdog Timer MB3793-30A 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 V to 2.4 V in 0.1-V steps. s FEATURES Precise detection of power voltage fall: ± 2.5% DataSheet4U.com Detection voltage with hysteresis Low power dispersion: ICC = 31 µA (reference) Internal dual-input watchdog timer Watchdog-timer halt function (by inhibition pin) Independently-set wacthdog and reset times DataShee 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) (DIT-8P-M01) DataSheet4U.com DataSheet 4 U .com www.DataSheet4U.com MB3793-30A s PIN ASSIGNMENT (TOP VIEW) 1 2 3 4 8 7 6 5 CK1 CK2 INH VCC RESET CTW CTP GND (FPT-8P-M01) (FPT-8P-M02) (FPT-8P-M03) (DIP-8P-M01) s PIN DESCRIPTION Pin no. 1 2 3 4 Symbol RESET CTW CTP GND Descriptions Outputs reset pin Pin no. 5 Symbol VCC INH CK2 CK1 Descriptions Power supply pin Inhibit pi...