mb3793-27apnf Fujitsu Microelectronics, Inc., mb3793-27apnf Datasheet - Page 17

• Manufacturer Part Number: mb3793-27apnf
• 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.
(ms)
time
C
TP
t
t
t
PR
WD
WR
*
[ms]
[ms]
[ms]
750
700
A
.
=
.
=
.
.
=
.
2
3
6
.
A
B
TP
D
CTW
CTP
INH
= 0.1
Symbol
C
C
C
TP
TW
MB3793
t
t
1600
1600
t
TP
WD
WR
PR
GND
V
[ F]
B
5
4
[ F]
CC
[ F]
F and
RESET
CK1
CK2
C
1
8
7
C
0
0
TW
= 0.01
V
CC
TP
.
=
.
.
=
=
55
50
.
= 3.3 V
.
.
D
and C
F
5.5
75
16
)
RESET
CK
Microprocessor 1
TW
V
V
GND
) and set time
CC
CC
Remark
= 3.3 V
= 3.0 V
V
CC
V
CC
.
=
.
=
.
= 3.0 V
.
.
=
.
70
16
5
MB3793
RESET
CK
Microprocessor 2
GND
V
CC
-27A
17