MB3793-37A Fujitsu Microelectronics, Inc., MB3793-37A Datasheet - Page 17

• Manufacturer Part Number: MB3793-37A
• Description: Power Voltage Monitoring Ic With Watchdog Timer
• Manufacturer: Fujitsu Microelectronics, Inc.

TYPICAL APPLICATION
V
CC
1. Equation of time-setting capacitances (C
2. (Example) when C
GND
C
TW
*
Values of A, B, C, and D
* : Use a capacitor with less leakage current.
C
TP
t
t
t
PR
WD
WR
*
[ms]
[ms]
However, when
[ms]
1300
(msec)
A
.
=
time
.
=
.
.
=
.
2
3
6
.
A
B
D
CTW
CTP
INH
TP
C
= 0.1
C
C
TP
TW
MB3793
1500
TP
GND
V
[ F]
B
5
4
[ F] + C
CC
[ F]
C
C
RESET
TW
TP
F and
CK1
CK2
about 10,
t
t
t
C
WD
WR
PR
1
8
7
C
0
C
TW
TP
= 0.01
[ F]
t
WD
TP
100
[ms]
D
and C
F
.
=
RESET
CK
.
Microprocessor 1
B
TW
V
GND
.
) and set time
=
.
=
.
=
.
CC
Remark
C
.
.
130
TW
15
10
= 5.0 V
V
[ F]
CC
MB3793
RESET
CK
Microprocessor 2
GND
V
CC
-37A
17