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Mitsumi Electronics - (MM1135 / MM1136) System Reset (with built-in watchdog timer) Monolithic IC

Numéro de référence MM1136
Description (MM1135 / MM1136) System Reset (with built-in watchdog timer) Monolithic IC
Fabricant Mitsumi Electronics 
Logo Mitsumi Electronics 





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MM1136 fiche technique
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MITSUMI
System Reset (with built-in watchdog timer) MM1135, MM1136
System Reset (with built-in watchdog timer)
Monolithic IC MM1135, MM1136
Outline
These ICs were developed to drive low voltage batteries, and have 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
3.4V±3%
2. Power supply voltage detection 3.2V±3%
3. Detection voltage error
0.2V±20mV 1-2
4. Hysteresis Both
50mV typ.
2. Watchdog function stop pin (can be made to function only as reset IC during VCC rise)
3. Low current consumption
150µA typ.
Package
SOP-8C (MM1135XF, MM1136XF)
Applications
1. 3V cordless telephones
2. Various types of small, handy equipment
Series Table
Model
MM1135
MM1136
VSLB
3.4V
TPR : Reset hold time during VCC rise
TWD : Timer monitoring time
TWR : Reset time
VSLB : Battery check detection voltage
VSLR : Reset detection voltage
VSLR
3.2V
TPR
100mS
100mS
TWD
10mS
100mS
TWR
2mS
2mS
*CT=0.02µF
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