MM1096A [MITSUMI]
System Reset (with built-in watchdog timer) Monolithic MM1096; 系统复位（带内置看门狗定时器）单片MM1096
| 型号： | MM1096A |
| 厂家： | 
MITSUMI ELECTRONICS, CORP. |
| 描述： | System Reset (with built-in watchdog timer) Monolithic MM1096 |
| 文件： | 总7页 (文件大小：128K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
System Reset (with built-in watchdog timer) MM1096
MITSUMI
CC
CC
(Except where noted otherwise, MM1096A : V =3.6V, Ta=25°C, MM1096B : V =5.0V)
Electrical Characteristics (DC)
Item
Symbol
Measurement conditions
Min. Typ. Max. Units
MM1096A
MM1096B
MM1096A
MM1096B
MM1096A
MM1096B
100 150
µA
Consumption current
ICC
VSL
VSH
During watchdog timer operation
130 195
3.10 3.20 3.30
VS=OPEN, VCC
VS=OPEN, VCC
4.05 4.20 4.35
V
Detection voltage
3.15 3.25 3.35
4.15 4.30 4.45
°
Detection voltage temperature coefficient
VS/
T
0.01
%/ C
mV
V
MM1096A
Hysteresis voltage
MM1096B
25
50 100
VHYS
VSH-VSL, VCC
50 100 150
CK input threshold
VTH
IIH
0.8 1.2
0
2
1
A : VCK=3.6V, B : VCK=5.0V
VCK=0V
CK input current
µA
IIL
-12
-6
-2
----------------------------------------------------
RESET
Output voltage
(High)
MM1096A
MM1096B
I
=1µA
3.0 3.4
4.0 4.5
VOH
V
VS=OPEN
----------------------------------------------------
RESET
VOL1
VOL2
IOL
I
I
=0.5mA, VS=0V
=1.0mA, VS=0V
0.2 0.4
0.3 0.5
2
Output voltage (Low)
V
----------------------------------------------------
RESET
----------------------------------------------------
RESET
R output sync current
CT charge current
V
=1.0V, VS=0V
1
mA
ICT1
ICT2
V
TC=1.0V during watchdog timer operation
-
0.28
-
0.48
-
0.96 µA
VTC=1.0V during power ON reset operation
-1.60
-2.40
-4.80 µA
----------------------------------------------------
Minimum operating power
RESET
V
=0.4V
VCCL
0.8 1.0
V
---------------------------------------------------
----------------------------------------------------
supply voltage to ensure RESET
RESET
I
=0.1mA
System Reset (with built-in watchdog timer) MM1096
MITSUMI
(Except where noted otherwise, MM1096A : VCC=3.6V, Ta=25°C, MM1096B : VCC=5.0V)
(Except where noted otherwise, resistance unit is Ω)
Electrical Characteristics (DC)
Item
Symbol
Measurement conditions
Min. Typ. Max.
Units
3.6V
2.8V
5.0V
4.0V
MM1096A
MM1096B
8
VCC
VCC
VCC input
pulse width
TPI
µs
8
CK input pulse width
CK input cycle
TCKW
TCK
3
µs
µs
CK
or
20
Watchdog timer
TWD
TWR
TPR
CT=0.02µF
CT=0.02µF
25
1
50
2
75
3
ms
ms
ms
monitoring time 1
*
Reset time for
watchdog timer 2
*
Reset hold time for
5
10
15
CT=0.02µF, VCC
power supply rise
3
*
--------------------------------------------------------------------------
Output delay time from VCC
4
TPD
tR
RESET pin, RL=10k, CL=20pF
2
10
4.0
1.0
µs
µs
µs
*
--------------------------------------------------------------------------
Output rise time 5
RESET pin, RL=10k, CL=20pF
--------------------------------------------------------------------------
2.0
0.2
*
Output fall time 5
tF
RESET pin, RL=10k, CL=20pF
*
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
-----------------------------------------------
reset release (RESET output high).
4 Output delay time is the time from when power supply voltage drops below detection voltage (VSL) until
*
reset (-R----------E---------S----------E---------T-------- 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
.
System Reset (with built-in watchdog timer) MM1096
Measuring Circuit 2 (AC)
MITSUMI
Measuring Circuits
Measuring Circuit 1 (DC)
SW & Power Supply Table
Measuring Circuit 1
-----------------------------------------------
RESET
Item
Symbol SW1 SW2 SW3 SW4 SW5 SW6
V
CC
VCK
V
CT
I
VM, IM
Notes
Consumption current
I
CC
OFF OFF OFF
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
OFF
OFF
A
A
A
A
A
A
A
A
A
B
A
A
3.6V 3.6V
0V
2V
2V
1V
0V
0V
2V
2V
2V
2V
1V
IV
I
CC
V
SL
OFF OFF
OFF OFF
ON
ON
3.6V 3V
3V 3.6V
0V
0V
V
V
O
O
1, CRT1
1, CRT1
Detection voltage
CK input threshold
CK input current
V
SH
V
TH
OFF OFF OFF
OFF OFF OFF
OFF OFF OFF
3.6V 0V 3V
3.6V 3.6V
ICK, VCK
I
IH
IL
OH
I
I
CK
I
3.6V
0V
CK
Output voltage (High)
Output voltage (Low)
V
ON
ON
OFF
ON
ON
ON
ON
ON
ON
ON
3.6V 3.6V
3.6V 3.6V
3.6V 3.6V
3.6V 3.6V
3.6V
-
1µA
V
V
V
O
O
O
1
1
1
VOL
1
2
0.5mA
1.0mA
VOL
ON
Output sink current
CT charge current 1
CT charge current 2
Minimum operating power
IOL
ITC
ITC
1
OFF
I
O
1
VO=1V
1
2
OFF OFF OFF
OFF OFF OFF
I
TC
TC
3.6V
I
V
CCL
ON
OFF
ON
ON
ON
A
0V 2V
0V
0V
VO1, VCC
supply voltage to ensure -R-----------E-----------S-----------E-----------T---------
SW & Power Supply Table
Measuring Circuit 2
Item
Symbol SW1 SW2
V
CCA
V
CC
V
CKA
V
CK
CRT
CRT1
CRT2
CRT1
CRT2
CRT1
CRT2
CRT1
CRT2
CRT1
CRT2
CRT1
CRT2
Notes
T2
T3
3.6V
2.8V
1.4V
T1
VCC input pulse width
TP
1
C
A
A
A
A
B
B
B
A
A
A
A
-
-
T1=8µs
0V
T2
1.4V
0V
CK input pulse width
CK input cycle
TCKW
-
-
-
-
-
3.6V
3.6V
3.6V
3.6V
3.6V
-
-
T2=3µs
or
T2
T2
T3
1.4V
0V
TCK
-
T3=20µs
Watchdog timer
monitoring time
Reset time
T
WD
-
-
-
-
3.6V
3.6V
3.6V
0V
TWR
for watchdog timer
Reset hold time for
power supply rise
Output delay time
from VCC
TPR
B
A
3.6V
0V
TPD
C
CRT1
Output rise time
Output fall time
T
R
A
A
A
A
-
-
3.6V
3.6V
-
-
3.6V CRT1
3.6V CRT1
T
F
System Reset (with built-in watchdog timer) MM1096
MITSUMI
Block Diagram
RA
~ ~
RB
MM1096A
MM1096B
305k
~ ~
195k
150k
350k
Note 1: CP=0.1µF approx.
>
Note 2: C 1000pF
=
Note 3: The watchdog timer
can be stopped by
connecting the RCT
pin to GND. Then it
functions as a voltage
detection circuit.)
Timing Chart
VCC
VSH
VSL
0.8V
CK
TCK
TC
TPR
TPR
TWD
TWR
RESET
1
2
3
4
5
5
6
7
8
9
10
11 12
System Reset (with built-in watchdog timer) MM1096
MITSUMI
Description of Operation
-------------------------------------------------
1. RESET goes low when VCC rises to approximately 0.8V.
-------------------------------------------------
Approximately 1µA (VCC=0.8V) of pull up current is output from RESET
.
.
2. Capacitor CT charging starts when VCC rises to VSH (MM1096A = 3.25V, MM1096B = 4.3V). Output is in
.
.
reset state at this time.
-----------------------------------------------
3. Output reset is released (RESET goes high) after a certain time (TPR), from when CT starts charging until
.
discharge (the time from when CT voltage reaches a certain threshold value 1 (= 1.4V) until CT voltage
.
.
drops to a certain threshold value 2 (= 0.2V).
.
Reset hold time : TPR is as follows.
.
TPR (ms) = 500 CT (µF)
.
CT charging starts again after reset release, and watchdog timer operation begins.
Clock input to the CK pin during CT charging will cause mis-operation.
4. If a clock is input (negative edge trigger) to the CK pin during CT charging, C switches from charging to
discharge.
.
5. Discharge switches to charging when CT voltage drops to a certain threshold value (= 0.2V). Steps 4 and
.
5 are repeated while a normal clock is input from the logic system.
6. Output goes to reset state (-R----------E---------S----------E---------T-------- goes low) when the clock ceases and CT voltage reaches reset ON
.
threshold value (= 1.4V).
.
The formula for CT charging time (TWD : watchdog timer monitoring time) until reset is output is as follows.
.
TWD (ms) = 2500 CT (µF)
.
7. Watchdog timer reset time TWR is the discharge time until CT voltage drops to reset OFF threshold value
.
(= 0.2V). The formula is as follows.
.
.
TWR (ms) = 100 CT (µF)
.
After reset OFF threshold value is reached, output reset is released and CT starts charging. Thereafter,
steps 4 and 5 are repeated if a normal clock is input, and when the clock ceases, 6 and 7 are repeated.
.
.
8. Reset is output when VCC drops to VSL (MM1096A = 3.2V, MM1096B = 4.2V). CT is charged
.
.
simultaneously.
9. CT charging starts when VCC rises to VSH.
When VCC drops momentarily, CT charging begins after the charge is first discharged, if the time from VCC
dropping below VSL until it rises to VSH is longer than the Vcc input pulse width standard value TPI.
10.Output reset is released after VCC goes above VSH and after TPR, and the watchdog timer starts. Thereafter,
8~10 are repeated when VCC goes below VSL.
11.When power is OFF, reset is output if VCC goes below VSL.
12.When VCC drops to 0V, reset output is held until VCC reaches 0.8V.
相关型号：
©2020 ICPDF网 联系我们和版权申明