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參數(shù)資料
| 型號(hào)： | MM1142 |
| 廠商： | MITSUMI ELECTRIC |
| 英文描述： | System Reset (with built-in watchdog timer) |
| 中文描述： | 系統(tǒng)復(fù)位（內(nèi)置看門狗定時(shí)器） |
| 文件頁(yè)數(shù)： | 1/5頁(yè) |
| 文件大小： | 135K |
| 代理商： | MM1142 |
MITSUMI
System Reset (with built-in watchdog timer) MM1142
System Reset (with built-in watchdog timer)
Monolithic IC MM1142
Outline
This IC was developed to drive low voltage batteries, and has a watchdog timer with built-in microcomputer
reset voltage detection circuit and low battery detection circuit.
A single reference voltage is used for low battery voltage detection and microcomputer reset voltage
detection, so detection voltage difference is uniform (.= 0.2V). Further, there is a built-in watchdog timer for
operation diagnosis, which prevents the system from running wild by generating an intermittent reset pulse
during system mis-operation.
Features
1. Accurate voltage drop detection voltage
1. Low battery detection
2. Power supply voltage detection
3. Detection voltage error
4. Hysteresis
2. Watchdog function stop pin (can be made to function only as reset IC during V
CC
rise)
3. Low current consumption
2.2V±3%
2.0V±3%
0.2V±20mV 1-2
both 50mV typ.
150μA typ.
Package
SOP-8C (MM1142XF)
Series Table
T
PR
: Reset hold time during Vcc rise
T
WD
: Timer monitoring time
T
WR
: Reset time
V
SLB
: Battery check detection voltage
V
SLR
: Reset detection voltage
Model
V
SLB
2.2V
V
SLR
2.0V
T
PR
100mS
T
WD
100mS
T
WR
2mS
*
C
T
=0.02μF
MM1142
Applications
1. 2V cordless telephones
2. Portable communication equipment
3. Various types of small, handy equipment
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