Product Descriptions

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.

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.

4) An active-low 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 .

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.

Product Features

♦ µMAX Package: Smallest 8-Pin SO 

♦ Guaranteed RESET Valid at VCC = 1V 

♦ Precision Supply-Voltage Monitor

4.65V in MAX705/MAX707/MAX813L

4.40V in MAX706/MAX708

♦ 200ms Reset Pulse Width 

♦ Debounced TTL/CMOS-Compatible Manual-Reset Input

♦ Independent Watchdog Timer—1.6sec Timeout (MAX705/MAX706)

♦ Active-High Reset Output (MAX707/MAX708/MAX813L)

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

Product Applications

Computers

Controllers

Intelligent Instruments

Automotive Systems

Critical µP Power Monitoring

Product Specification

Product Photos

For more product information, please download the PDF