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MB3793-42 Datasheet, PDF (17/25 Pages) Fujitsu Component Limited. – POWER-VOLTAGE MONITORING IC WITH WATCHDOG TIMER | |||
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â STANDARD CONNECTION
VCC
MB3793-42
CTW
CTP
5
VCC
RESET 1
2 CTW
MB3793
3 CTP
CK1 8
INH GND
6
4
CK2 7
RESET VCC
CK
Micro-
processor 1
GND
RESET VCC
CK Micro-
processor 2
GND
Equation of time-setting capacitances (CTP and CTW) and set time
tPR (ms) â A à CTP (µF)
tWD (ms) â B à CTW (µF) + C à CTP (µF)
However, when CTP/CTW ⤠10,
tWD (ms) â B à CTW (µF)
tWR (ms) â D à CTP (µF)
Value of A, B, C and D
A
B
C
1300
1500
3
D
Remark
100
(Example) When CTP = 0.1 µF and CTW = 0.01 µF,
tPR â 130 [ms]
tWD â 15 [ms]
tWR â 10 [ms]
17
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