MB3793-45 Datasheet, PDF (19/28 Pages) Fujitsu Component Limited. – POWER-VOLTAGE MONITORING IC WITH WATCHDOG TIMER

2. Supply voltage monitor and watchdog timer stop
VCC
MB3793-45
CTW* CTP*
GND
5
2 _CTW
VCC
RESET 1
MB3793
3 ^CTP
CK1 8
6 INH GND CK2 7
4
RESET VCC
Microprocessor1
CK
HALT
GND
* : Use a capacitor with less leakage current.
RESET VCC
Microprocessor2
CK
HALT
GND
3. Setting of compulsory reset
VCC
RESIN
10 kΩ
CTW^*
CTP^*
2 CTW
5
VCC
RESET 1
MB3793
3 CTP
CK1 ₈
6 INH GND CK2 ₇
4
RESET VCC
Microprocessor
CK
GND
GND
* : Use a capacitor with less leakage current.
It is possible for the RESET pin to fix to “L” if the CTP pin is short-circuited to GND.
Take care not to change the value of the CTP capacity because of the influence of Tr that
is used at the time.
DS04-27405-2E
19