Datasheet > MAX708MJA

MAX708MJA

更新时间： 2024-12-01 02:53:07

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描述
Low-Cost, pervisory Circuit

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MAX708MJA 数据手册

MAX705-MAX813L

Low-Cost, µP Supervisory Circuit

General Description

The MAX705-MAX708/MAX813L microprocessor (µP)

supervisory circuits reduce the complexity and number of

components required to monitor power-supply and battery

functions in µP systems. These devices significantly improve

system reliability and accuracy compared to separate ICs or

discrete components.

Applications

z Computers

z Controllers

z Intelligent Istruments

z Automotive Systems

z Critical µP Power Monitoring

The MAX705/MAX706/MAX813L provide four functions:

1)A reset output during power-up, power-down, and brownout

conditions.

2) An independent watchdog output that goes low if the

watchdog input has not been toggled within 1.6 seconds.

3)A 1.25V threshold detector for power-fail warning,

low-battery detection, or for monitoring a power supply other

than +5V.

Features

z µMAX Package: Smallest 8-Pin SO

z Guaranteed RESET Valid at Vcc=1V

z Precision Supply-Voltage Monitor

4.65V in MAX705/MAX707/MAX813L

4.40V in MAX706/MAX708

z 200ms Reset Pulse Width

4) An active-low manual-reset input.

z Debounced TTL/CMOS-Compatible Manual-Reset Input

The MAX707/MAX708 are the same as the MAX705/MAX706,

except an active-high reset is substituted for the watchdog

timer. The MAX813L is the same as the MAX705, except

RESET is provided instead of RESET.

z Independent Watchdog Timer

–

1.6sec Timeout

(MAX705/MAX706)

z Active-high Reset Output (MAX707/MAX708/MAX813L)

z Voltage Monitor for Power-Fail or Low-Battery Warning

Two supply-voltage monitor levels are available: The

MAX705/MAX707/MAX813L generate a reset pulse when the

supply

voltage

drops

below

4.65V,

while

the

MAX706/MAX708 generate a reset pulse below 4.40V. All four

parts are available in 8-pin DIP, SO and µMAX packages.

Typical Operating Circuit

Pin Configurations

TOP VIEW

()ARE FOR MAX813L ONLY.

Pin Configurations continued at end of data sheet.

www.artschip.com

12 3 4 5 6 7...10

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