MM1035 데이터 시트보기 (PDF) - Mitsumi
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MM1035 Datasheet PDF : 10 Pages
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MITSUMI
System Reset (with built-in watchdog timer) MM1035
Electrical Characteristics 2 (AC) (Except where noted otherwise, Ta=25°C, VCC=5V, measurement circuit 2)
Item
Measurement
Symbol
Measurement conditions
circuit
VCC input pulse width
TPI
5V
2
VCC
4V
CK input pulse width TCKW
2
CK
or
CK input cycle
TCK
2
Watchdog timer
TWD
* monitoring time 1
Reset time for
TWR
* watchdog timer 2
Reset hold time for
TPR
* power supply rise 3
TPD1
Output delay time from VCC
2
CT=0.1µF
2
CT=0.1µF
2
CT=0.1µF, VCC
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RESET pin
2
RL1=2.2kΩ, CL1=100pF
*4
TPD2
2
tR1
2
Output rise time
RESET pin
RL2=10kΩ, CL2=20pF
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RESET pin
RL1=2.2kΩ, CL1=100pF
*5
tR2
2
RESET pin
RL2=10kΩ, CL2=20pF
Min. Typ. Max. Units
8
µS
3
µS
20
µS
5 10 15 mS
1 2 3 mS
50 100 150 mS
2 10
µS
3 10
1.0 1.5 µS
1.0 1.5 µS
Notes :
*1: Monitoring time is the time from the last pulse (negative edge) of the timer clear clock pulse, until reset
pulse output. In other words, reset output is output if a clock pulse is not input during this time.
*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 VCC exceeds detection voltage (VSH) during power on reset, until
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RESET output goes high (reset release).
*4: Output delay time is the time from when power supply voltage drops below detection voltage (VSL), until
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RESET output goes low (reset status).
*5: Voltage range when measuring output rise and fall is 10~90%.
*6: Watchdog timer monitoring time (TWD), watchdog timer reset time (TWR) and reset hold time (TPR) during
power supply rise can be changed by varying CT capacitance. The times are expressed by the following
formulae. The recommended range for CT is 0.001~10µF.
TPR (mS) .=. 1000 CT (µF)
TWD (mS) .=. 100 CT (µF)
TWR (mS) .=. 20 CT (µF)
Example : When CT=0.1µF
TPR .=. 100mS
TWD .=. 10mS
TWR .=. 2mS
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