mm1035 Mitsumi Electronics, Corp., mm1035 Datasheet - Page 3

• Manufacturer Part Number: mm1035
• Description: Ic For System Reset With Built-in Watchdog Timer
• Manufacturer: Mitsumi Electronics, Corp.

MITSUMI
Electrical Characteristics 2 (AC)
Notes :
*
*
*
*
*
*
Output delay time from V
1: Monitoring time is the time from the last pulse (negative edge) of the timer clear clock pulse, until reset
2: Reset time means reset pulse width. However, this does not apply to power on reset.
3: Reset hold time is the time from when V
4: Output delay time is the time from when power supply voltage drops below detection voltage (V
5: Voltage range when measuring output rise and fall is 10~90%.
6: Watchdog timer monitoring time (T
V
CK input pulse width
power supply rise
monitoring time
watchdog timer
Reset hold time for
CC
pulse output. In other words, reset output is output if a clock pulse is not input during this time.
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
RESET
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
RESET
power supply rise can be changed by varying C
formulae. The recommended range for C
Watchdog timer
Output rise time
CK input cycle
Reset time for
input pulse width
Item
output goes high (reset release).
output goes low (reset status).
*
*
T
T
T
4
5
PR
WD
WR
(ms)
(ms)
(ms)
*
*
.
= . 1000
*
.
.
= . 100
= . 20
1
2
3
CC
Symbol
C
T
T
T
T
T
T
T
T
t
t
C
T
CKW
PD
PD
R
R
C
WD
WR
CK
PR
PI
T
1
2
(µF)
1
2
T
(µF)
(µF)
Measurement
WD
circuit
), watchdog timer reset time (T
2
2
2
2
2
2
2
2
2
2
CC
Example : When C
T
(Except where noted otherwise, Ta=25°C, V
(Except where noted otherwise, resistance unit is Ω)
is 0.001~10µF.
exceeds detection voltage (V
IC for System Reset (with built-in watchdog timer) MM1035
T
V
capacitance. The times are expressed by the following
CK
C
CC
Measurement conditions
T
T
T
T
=0.1µF, V
PR
WD
WR
R
R
5V
4V
R
R
L
L
. =
.
.
1=2.2k, C
L
1=2.2k, C
L
= . 10ms
= . 2ms
. 100ms
2=10k, C
2=10k, C
---------------------------------------
RESET
RESET pin
----------------------------------------
RESET
RESET pin
C
C
T
=0.1µF
T
T
CC
=0.1µF
=0.1µF
L
L
L
L
1=100pF
1=100pF
2=20pF
2=20pF
pin
pin
or
WR
) and reset hold time (T
SH
) during power on reset, until
CC
=5V, measurement circuit 2)
Min. Typ. Max. Units
20
50
8
3
5
1
100
1.0
1.0
10
2
2
3
150
1.5
1.5
PR
15
10
10
3
) during
SL
), until
ms
ms
ms
µs
µs
µs
µs
µs
µs