MB3773 Fujitsu, MB3773 Datasheet - Page 10

• Manufacturer Part Number: MB3773
• Description: Power Supply Monitor with Watch-Dog Timer
• Manufacturer: Fujitsu

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