mm1075 Mitsumi Electronics, Corp., mm1075 Datasheet - Page 7

• Manufacturer Part Number: mm1075
• Description: Ic For System Reset With Built-in Watchdog Timer
• Manufacturer: Mitsumi Electronics, Corp.

MITSUMI
Measuring Circuit 2-2
Detection Voltage Adjustment 1
V
CK input pulse width T
Reset hold time for
CC
power supply rise
Output delay time
Watchdog timer
Output rise time
monitoring time
watchdog timer
Output fall time
CK input cycle
Detection voltage can be changed by
connecting resistor R2 externally to
MM1075 V
graph 1 when changing V
Reset time for
input pulse width
from V
Item
CC
S
pin. Determine R2 according to
Symbol SW1 SW2
T
T
T
T
T
T
T
T
T
T
T
CKW
PD
PD
WD
WR
R
R
P
P
CK
PR
PI
1
2
1
2
1
2
B A
C
A
A
A
A
C
C
A
A
A
A
S
.
SW & Power Supply Table
B
B
B
A
A
A
A
A
A
A
A
A
5V
4V
5V
0V
5V
0V
V
CCA
-
-
-
-
-
-
-
-
-
T1
(lowering detection voltage)
IC for System Reset (with built-in watchdog timer) MM1075
V
5V
5V
5V
5V
5V
5V
5V
5V
5V
Graph 1. Detection voltage change using MM1075
-
-
-
CC
5.0
4.5
1.4V
0V
1.4V
0V
1.4V
0V
external resistor
100 200 300 400 500 600
Vs pin external resistance
V
T2
CKA
-
-
-
-
-
-
-
-
-
T2
T2
or
V
SL
(R2) (kΩ)
value
T2
T3
T3
V
SH
V
5V
5V
5V
0V
0V
5V
5V
5V
5V
-
-
-
CK
value
CRT1, 2, 3
CRT1, 2, 3
CRT1, 2, 3
CRT1, 2, 3
CRT1, 2, 3
CRT1, 2, 3
CRT1, 3
CRT2, 3
CRT1
CRT2
CRT1
CRT2
CRT
T3=20µs
T1=8µs
T2=3µs
Notes