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summary, where supported. Future routine revisions will occur when appropriate, and changes will be noted in a
revision summary.
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DS04-27406-5Ea
FUJITSU MICROELECTRONICS
DATA SHEET
Copyright©2003-2008 FUJITSU MICROELECTRONICS LIMITED All rights reserved
2006.5
ASSP For Power Supply Applications
BIPOLAR
Power Voltage Monitoring IC
with Watchdog Timer
MB3793-30A
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 V to 2.4 V in 0.1-V steps.
FEATURES
Precise detection of power voltage fall: ± 2.5%
Detection voltage with hysteresis
Low power dispersion: I
CC = 31 µA (reference)
Internal dual-input watchdog timer
Watchdog-timer halt function (by inhibition pin)
Independently-set watchdog and reset times
Three types of packages (SOP-8pin : 2 types, SSOP-8pin : 1 type)
APPLICATION
Arcade Amusement etc.
MB3793-30A
2
PIN ASSIGNMENTS
PIN DESCRIPTION
Pin no. Symbol Descriptions Pin no. Symbol Descriptions
1 RESET
Outputs reset pin 5 VCC Power supply pin
2CTW
Watchdog timer monitor time
setting pin
6 INH Inhibit pin
3CTP
Power-on reset hold time set-
ting pin
7 CK2 Inputs clock 2 pin
4 GND Ground pin 8 CK1 Inputs clock 1 pin
RESET
CTW
CTP
GND
CK1
CK2
INH
V
CC
(FPT-8P-M01)
(FPT-8P-M02)
(FPT-8P-M03)
(TOP VIEW)
1
2
3
4
8
7
6
5

MB3793-30APNF-G-JN-ER6E1

Mfr. #:
Manufacturer:
Fujitsu
Description:
Supervisory Circuits BIP-LINEAR INDUSTRY.LINEAR
Lifecycle:
New from this manufacturer.
Delivery:
DHL FedEx Ups TNT EMS
Payment:
T/T Paypal Visa MoneyGram Western Union

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