mm1075 Mitsumi Electronics, Corp., mm1075 Datasheet

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mm1075

Manufacturer Part Number
mm1075
Description
Ic For System Reset With Built-in Watchdog Timer
Manufacturer
Mitsumi Electronics, Corp.
Datasheet

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MITSUMI
Outline
Features
Packages
Application
Absolute Maximum Ratings
This IC functions in a variety of CPU systems and other logic systems to generate a reset signal and reset the
system accurately when the power is turned on or interrupted.
It includes a watchdog timer which allows diagnosis of the system operation, so that it prevents system
runaway by intermittently generating a reset pulse when system misoperation occurs.
1. Built-in watchdog timer
2. Low minimum operating voltage
3. Positive and negative logic reset outputs can be extracted
4. Accurate detection of drop in supply voltage
5. Detection voltage with hysteresis
6. Few external components
7. Timer monitoring time can be varied by using an external resistor.
DIP-8A (MM1075XD)
SOP-8A (MM1075XF)
Microcomputer system monitoring, etc.
IC for System Reset (with built-in watchdog timer)
Monolithic IC MM1075
Voltage applied to RESET, RESET
Voltage applied to VS & CK pins
Operating temperature
Power supply voltage
Storage temperature
Allowable loss
Item
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
(Ta=25
pin
V
one capacitor
CC
°
C)
=0.8V typ.
IC for System Reset (with built-in watchdog timer) MM1075
V
V
Symbol
VS
CC
T
T
V
Pd
OPR
&V
STG
max.
OH
CK
-40~+125
-0.3~+10
-0.3~+10
-0.3~+10
-20~+70
Rating
400
Units
mW
°
°
V
V
V
C
C

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mm1075 Summary of contents

Page 1

... Application Microcomputer system monitoring, etc. Absolute Maximum Ratings Item Storage temperature Operating temperature Power supply voltage Voltage applied to VS & CK pins Voltage applied to RESET, RESET Allowable loss IC for System Reset (with built-in watchdog timer) MM1075 V =0.8V typ. CC one capacitor (Ta=25 ° C) Symbol T STG ...

Page 2

... RESET Minimum operating power supply V CCL voltage to ensure RESET IC for System Reset (with built-in watchdog timer) MM1075 (Except where noted otherwise, Ta=25°C, V Measurement Measurement conditions circuit 1 ...

Page 3

... WD (ms Example : When 100ms 100ms 2ms WR IC for System Reset (with built-in watchdog timer) MM1075 (Except where noted otherwise, Ta=25°C, V (Except where noted otherwise, resistance unit is Ω) Measurement Measurement conditions circuit ...

Page 4

... Note 1000pF Note 3 : The watchdog timer can be stopped by connecting the RCT pin to GND. (Then it functions as a voltage detection circuit.) Note resistor. The recommended range for RCT is 100kΩ~R IC for System Reset (with built-in watchdog timer) MM1075 1M 10M R CT Graph 1 R & ...

Page 5

... V 4.2V detection voltage 5 CC RCT Watchdog timer stop pin Operation modes : Operation 6 V Detection voltage variable pin Adjustment modes : Lower 7 S --------------------------------------------------------------- 8 RESET Reset output pin (Low output) IC for System Reset (with built-in watchdog timer) MM1075 ...

Page 6

... RESET Minimum operating power supply V 2 OFF ON CCL voltage to ensure RESET IC for System Reset (with built-in watchdog timer) MM1075 Measuring Circuit 2 SW & Power Supply Table ...

Page 7

... Output fall time Detection Voltage Adjustment 1 Detection voltage can be changed by connecting resistor R2 externally to MM1075 V pin. Determine R2 according to S graph 1 when changing for System Reset (with built-in watchdog timer) MM1075 SW & Power Supply Table V V CCA 1. ...

Page 8

... PULL UP resistance 2.2kΩ 7.0 6.0 5.0 4.0 3.0 ° Ta=-25 C 2.0 ° Ta=25 C 1.0 ° Ta=75 C 1.0 2.0 3.0 4.0 5.0 6.0 7.0 8.0 Power supply voltage V ( for System Reset (with built-in watchdog timer) MM1075 (raising detection voltage) Graph 2. Detection voltage change using MM1075 external resistor 4.0 3.5 3 Output voltage-Power supply voltage (RESET pin) 7.0 6.0 5.0 4.0 3.0 2.0 1.0 Detection voltage (V (RESET, RESET 4.50 4.40 4.30 4 ...

Page 9

... Ambient temperature Ta (°C) IC for System Reset (with built-in watchdog timer) MM1075 Output saturation voltage-Output sink current - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - ...

Page 10

... C capacitance (µ for System Reset (with built-in watchdog timer) MM1075 Watchdog timer monitoring time temperature 100 10 C value for reset time (for watchdog timer ...

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