MB3793-37A

www.DataSheet4U.com FUJITSU SEMICONDUCTOR DATA SHEET DS04-27403-3E ASSP For Power Supply Applications BIPOLAR Power Voltage Monitoring IC with Watchdog Timer MB3793-37A 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 application systems. There is also a mask option that can detect voltages of 4.9 to 2.4 V in 0.1-V steps. The model number is MB3793-37A corresponding to the detected voltage. The model number and package code DataShee are as shown below. Model No. Package code Detection voltage DataSheet4U.com MB3793-37A 3793AF 3.7 V s FEATURES Precise detection of power voltage fall: ±2.5% Detection voltage with hysteresis Low power dispersion: ICC = 30 µA (reference) Internal dual-input watchdog timer Watchdog-timer halt function (by inhibition pin) Independently-set wacthdog and reset times s PACKAGE 8-pin, Plastic SOP 8-pin, Plastic SOP (FPT-8P-M01) (FPT-8P-M02) DataSheet4U.com DataSheet 4 U .com www.DataSheet4U.com MB3793-37A 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) s PIN DESCRIPTION Pin no. 1 2 3 4 Symbol RESET CTW CTP GND De...