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參數(shù)資料
| 型號： | MM1135 |
| 廠商： | MITSUMI ELECTRIC |
| 英文描述： | System Reset (with built-in watchdog timer) Monolithic IC |
| 中文描述： | 系統(tǒng)復(fù)位（內(nèi)置看門狗定時器）單片集成電路 |
| 文件頁數(shù)： | 5/6頁 |
| 文件大?。?/td> | 114K |
| 代理商： | MM1135 |
MITSUMI
System Reset (with built-in watchdog timer) MM1135, MM1136
V
CC
input pulse width
8
T
PI
μS
CK input pulse width
T
CKW
3
μS
CK input cycle
T
CK
20
μS
Watchdog timer monitoring time
*
1
Watchdog timer
reset time
*
2
Reset hold time for
power supply rise
*
3
T
WD
C
T
=0.02μF
50
100
150
mS
T
WR
C
T
=0.02μF
1
2
3
mS
T
PR
C
T
=0.02μF
50
100
150
mS
------------------------------------------
delay time
t
PDR
t
PDB
t
RR
t
FR
t
RB
t
FB
V
CC
: High Low, R
LR
=10k
, C
LR
=15pF
V
CC
: High Low, R
LB
=4.7k
, C
LB
=15pF
R
LR
=10k
, C
LR
=15pF
R
LR
=10k
, C
LR
=15pF
R
LB
=4.7k
, C
LB
=15pF
R
LB
=4.7k
, C
LB
=15pF
10
10
10
2
10
2
μS
μS
μS
μS
μS
μS
BC delay time
------------------------------------------
rise time
------------------------------------------
fall time
BC rise time
BC fall time
V
CC
3.8V
2.8V T
PI
T
CKW
CK
or
CK T
CK
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 V
CC
exceeds detection voltage (V
SHR
) during power ON reset until
reset release (RESET
*
4 Watchdog timer monitoring time (T
WD
), watchdog timer reset time (T
WR
) and reset hold time (T
PR
) during
power supply rise can be changed by varying C
T
capacitance. The times are expressed by the following
formulae.
T
PR
(mS).= 5000 C
T
(μF)
T
WD
(mS).= 5000 C
T
(μF)
T
WR
(mS).= 100 C
T
(μF)
Example : When C
T
=0.02μF
T
PR
.= 100mS
T
WD
.= 100mS
T
WR
.= 2mS
*
5 T
WD
can be varied by placing a resistor (1MEG
or more) between the RCT pin and V
CC
.
*
6 The voltage range when measuring output rise and fall time is 10~90%.
*
7 V
CC
rise time should be 100μS or more, and fall time should be 50μS or more.
output high).
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