MM1096 Ver la hoja de datos (PDF) - Mitsumi
Número de pieza
componentes Descripción
Fabricante
MM1096 Datasheet PDF : 7 Pages
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MITSUMI
System Reset (with built-in watchdog timer) MM1096
Electrical Characteristics (DC) (Except where noted otherwise, MM1096A : VCC=3.6V, Ta=25°C, MM1096B : VCC=5.0V)
(Except where noted otherwise, resistance unit is Ω)
Item
Symbol
Measurement conditions
Min. Typ. Max. Units
MM1096A
VCC input
TPI
pulse width
MM1096B
3.6V
VCC
2.8V
5.0V
VCC
4.0V
8
µs
8
CK input pulse width TCKW
CK
or
3
µs
CK input cycle
TCK
20
µs
Watchdog timer
TWD
* monitoring time 1
Reset time for
TWR
* watchdog timer 2
Reset hold time for
TPR
* power supply rise 3
* Output delay time from VCC 4 TPD
* Output rise time 5
tR
* Output fall time 5
tF
CT=0.02µF
CT=0.02µF
CT=0.02µF, VCC
--------------------------------------------------------------------------
RESET pin, RL=10k, CL=20pF
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RESET pin, RL=10k, CL=20pF
--------------------------------------------------------------------------
RESET pin, RL=10k, CL=20pF
25 50 75
ms
1
2
3
ms
5
10 15
ms
2
10
µs
2.0 4.0
µs
0.2 1.0
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 release (RESET output high).
*4 Output delay time is the time from when power supply voltage drops below detection voltage (VSL) until
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reset (RESET output low).
*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.
TPR (ms) .=. 500 CT (µF)
TWD (ms) .=. 2500 CT (µF)
TWR (ms) .=. 100 CT (µF)
Example : When CT=0.02µF
TPR .=. 10ms
TWD .=. 50ms
TWR .=. 2ms
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