MM1135 データシートの表示（PDF） - Mitsumi

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MM1135

System Reset (with built-in watchdog timer)

Mitsumi 

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

VSLR

3.2V

TPR : Reset hold time during VCC rise

TWD : Timer monitoring time

TWR : Reset time

VSLB : Battery check detection voltage

VSLR : Reset detection voltage

TPR

100mS

100mS

TWD

10mS

100mS

TWR

2mS

2mS

*CT=0.02µF

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