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MB3793-42PNF-E1

POWER-VOLTAGE MONITORING IC WITH WATCHDOG TIMER

Fujitsu 

FUJITSU SEMICONDUCTOR

DATA SHEET

DS04-27402-5E

ASSP

BIPOLAR

POWER-VOLTAGE MONITORING IC

WITH WATCHDOG TIMER

MB3793-42

■ 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.

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.

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