MB3793-42

www.DataSheet4U.com FUJITSU SEMICONDUCTOR DATA SHEET DS04-27402-4E ASSP POWER-VOLTAGE MONITORING IC WITH WATCHDOG TIMER MB3793-42 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 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. MB3793-42 Package code 3793-A Detection voltage 4.2 V DataSheet4U.com DataShee s 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) s PACKAGES 8-pin plastic DIP 8-pin plastic SOP 8-pin plastic SOP (DIP-8P-M01) (FPT-8P-M01) (FPT-8P-M02) DataSheet4U.com DataSheet 4 U .com www.DataSheet4U.com MB3793-42 s PIN ASSIGNMENT (TOP VIEW) 1 2 3 4 8 7 6 5 CK1 CK2 INH VCC RESET CTW CTP GND (DIP-8P-M01) (FPT-8P-M01) (FPT-8P-M02) s PIN DESCRIPTION Pin No. 1 2 3 4 Symbol RESET CTW CTP GND De...