MM1099B データシートの表示（PDF） - Mitsumi
部品番号
コンポーネント説明
一致するリスト
MM1099B Datasheet PDF : 7 Pages
| |||
MITSUMI
System Reset (Built-in Watch Dog Timer) MM1099
Electrical Characteristics (AC) (Except where noted otherwise, MM1096A : VCC=3.6V, Ta=25°C MM1096B : VCC=5.0V)
Item
Symbol
Measurement conditions
Min. Typ. Max. Units
MM1099A
VCC input
TPI
pulse width
MM1099B
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=10kΩ, CL=20pF
----------------------------------------------------------------------
RESET pin, RL=10kΩ, CL=20pF
----------------------------------------------------------------------
RESET pin, RL=10kΩ, CL=20pF
50 100 150 mS
1
2
3
mS
50 100 150 mS
2
10
µS
2.0 4.0
µS
0.2 1.0
µS
Notes :
*1 The "monitoring time" means the time interval from the last pulse of the clock pulses for timer clear
(negative edge) to the output of the reset pulse. If the clock pulse is not input during this time interval, the
reset output will be given.
*2 The "reset time" is no other than the reset pulse width, except when resetting the POWER ON.
*3 The "reset hold time" is the time interval from the time point when VCC exceeds the detect (VSH) at the time
-------------------------------------------------
of Power On Reset (Power variation reset) to the reset release (RESET output "HIGH").
*4 The "output delay time" means the time interval from when the supply voltage comes lower than the
-------------------------------------------------
detect voltage (VSL) to when comes the reset state (RESET output "Low").
*5 The voltage range is 10 to 90% when measuring the output rise and fall times.
*6 By varying the capacitance of CT, we can vary the watch dog timer monitoring time (TWD), the reset time at
the time of the watch dog timer (TWR), and the reset hold time at the time of power source rise (TPR). The
variable time can be expressed by the following formulas:
TPR (mS) .=. 5000 CT (µF)
TWD (mS) .=. 5000 CT (µF)
TWR (mS) .=. 100 CT (µF)
Example : When CT=0.02µF
TPR .=. 100mS
TWD .=. 100mS
TWR .=. 2mS
Share Link: 