mm1035 Mitsumi Electronics, Corp., mm1035 Datasheet

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mm1035

Manufacturer Part Number
mm1035
Description
Ic For System Reset With Built-in Watchdog Timer
Manufacturer
Mitsumi Electronics, Corp.
Datasheet

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MITSUMI
Outline
Features
Packages
Applications
Absolute Maximum Ratings
This IC functions in a variety of CPU systems and other logic systems to generate a reset signal and 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
DIP-8A (MM1035XD)
SOP-8A (MM1035XF)
Microcomputers
IC for System Reset (with built-in watchdog timer)
Monolithic IC MM1035
Voltage applied to RESET, RESET pin
Voltage applied to VS & CK pins
Operating temperature
Power supply voltage
Storage temperature
Allowable loss
Item
(Ta=25
V
one capacitor
CC
°
C)
=0.8V typ.
IC for System Reset (with built-in watchdog timer) MM1035
V
V
Symbol
VS
CC
T
T
V
Pd
& V
OPR
STG
max.
OH
CK
340 (SOP-8)
400 (DIP-8)
-40~+125
-0.3~+10
-0.3~+10
-0.3~+10
-20~+70
Rating
Units
mW
°
°
V
V
V
C
C
August 19, 2003

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mm1035 Summary of contents

Page 1

... SOP-8A (MM1035XF) Applications Microcomputers Absolute Maximum Ratings Item Storage temperature Operating temperature Power supply voltage Voltage applied to VS & CK pins Voltage applied to RESET, RESET pin Allowable loss IC for System Reset (with built-in watchdog timer) MM1035 V =0.8V typ. CC one capacitor ° (Ta=25 C) Symbol Rating T ...

Page 2

... RESET IC for System Reset (with built-in watchdog timer) MM1035 (Except where noted otherwise, Ta=25°C, V (Except where noted otherwise, resistance unit is Ω ...

Page 3

... The recommended range for (ms 1000 (ms 100 (ms for System Reset (with built-in watchdog timer) MM1035 (Except where noted otherwise, Ta=25°C, V (Except where noted otherwise, resistance unit is Ω) Measurement Measurement conditions circuit CKW T ...

Page 4

... Note 2: C > = 1000pF. Note 3: The watchdog timer can be stopped by connecting the RCT pin to GND. Timing Chart RESET RESET Pin Assignment for System Reset (with built-in watchdog timer) MM1035 (Then it functions as a voltage detection circuit ...

Page 5

... RCT --------------------------------------------------------------- 8 RESET Measuring Circuit Measuring Circuit 1 (DC) Measuring Circuit 2 (AC) IC for System Reset (with built-in watchdog timer) MM1035 Function variable pins the external capacitor.) Reset output pin (High output) Clock input pin (inputs clock from logic system) GND pin 4 ...

Page 6

... A R Output rise time Output fall time for System Reset (with built-in watchdog timer) MM1035 OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF ON ...

Page 7

... MITSUMI Detection Voltage Variation 1 Graph 1. Detection voltage change using MM1035 external resistor Detection Voltage Variation 2 Graph 2. Detection voltage change using MM1035 external resistor IC for System Reset (with built-in watchdog timer) MM1035 (lowering detection voltage) Detection voltage can be changed by connecting resistor R1 externally to MM1035 Vs pin. Determine R1 according to graph 1 when changing Vs ...

Page 8

... 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 Output saturation voltage-Output sink current (RESET 500 400 300 ° Ta=25 C 200 100 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 Output sink current I IC for System Reset (with built-in watchdog timer) MM1035 Output voltage-Power supply voltage (RESET pin) 7.0 6.0 5.0 4.0 3.0 2.0 1.0 (V) CC ------------------------------------------------------------------ pin) Detection voltage (V 4.50 4.40 4.30 4.20 4.10 4.00 3.00 ( ...

Page 9

... Ambient temperature Ta (°C) Reset time temperature (for watchdog timer 3.5 3.0 2.5 2.0 1.5 1.0 0.5 -40 - 100 Ambient temperature Ta (°C) IC for System Reset (with built-in watchdog timer) MM1035 High level output voltage - High level output current ------------------------------------------------ (RESET 5.0 4.8 4.6 4.4 4.2 4.0 3.8 (µA) OM Watchdog timer monitoring time temperature =5V (Cr=0.1µF) ...

Page 10

... capacitance (µ for System Reset (with built-in watchdog timer) MM1035 C value for watchdog timer monitoring time ...

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