MB3793-34A Datasheet, PDF (20/26 Pages) Cypress Semiconductor – Precise detection of power voltage fall: 2.5%

11.2 Supply voltage monitor and watchdog timer stop
VCC
MB3793-34A
5
2 _CTW
VCC
RESET 1
CTW* CTP*
GND
MB3793
3 ^CTP
CK1 8
6 INH GND CK2 7
4
* : Use a capacitor with less leakage current.
RESET VCC
Microprocessor1
CK
HALT
GND
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 C_TP capacity because of the influence of Tr that is used at
the time.
Document Number: 002-08556 Rev. *A
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