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APPLICATION CIRCUIT
EXAMPLE 1: Monitoring 5V Supply Voltage and Watchdog Timer
VCC (5V)
C
T
Notes : Supply voltage is monitored using V
Detection voltage are V
EXAMPLE 2: 5V Supply Voltage Monitoring (external fine-tuning type)
V
(5V)
CC
C
T
Notes : Vs detection voltage can be adjusted externally.
Based on selecting R
internal voltage divider, the detection voltage can be set according to the resistance ratio of
R
and R
(See the table below.)
1
2
R
(k )
1
10
9.1
MB3773
1
8
7
2
6
3
4
5
.
S
and V
.
SH
SL
MB3773
1
8
2
7
3
6
4
5
and R
values that are sufficiently lower than the resistance of the IC's
1
2
R
(k )
Detection voltage: V
2
3.9
3.9
RESET
RESET
CK
R
1
R
2
(V)
Detection voltage: V
SL
4.4
4.1
MB3773
Logic circuit
GND
Logic circuit
RESET
RESET
CK
GND
(V)
SH
4.5
4.2
13
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