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MAX6822 - Low-Voltage SOT23 uP Supervisors

Description

The MAX6821

MAX6825 are low-voltage microprocessor (µP) supervisory circuits that combine voltage monitoring, watchdog timer, and manual reset input functions in a 5-pin SOT23 package.

Features

  • o Monitors +1.8V, +2.5V, +3.0V, +3.3V, +5.0V Supplies o 140ms (min) Reset Timeout Delay o 1.6s Watchdog Timeout Period (MAX6821/MAX6822/MAX6823/MAX6824) o Manual Reset Input (MAX6821/MAX6822/MAX6823/MAX6825) o Three Reset Output Options Push-Pull RESET Push-Pull RESET Open-Drain RESET o Guaranteed Reset Valid to VCC = +1.0V o Immune to Short Negative VCC Transients o No External Components o Small 5-Pin SOT23 Packages MAX6821.
  • MAX6825 Ordering Information PART.
  • MAX6821 _UK-T MAX6822.

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Full PDF Text Transcription

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19-1868; Rev 1; 1/01 Low-Voltage SOT23 µP Supervisors with Manual Reset and Watchdog Timer General Description The MAX6821–MAX6825 are low-voltage microprocessor (µP) supervisory circuits that combine voltage monitoring, watchdog timer, and manual reset input functions in a 5-pin SOT23 package. Microprocessor supervisory circuits significantly improve system reliability and accuracy compared to separate ICs or discrete components. These devices assert a reset signal whenever the monitored voltage drops below its preset threshold, keeping it asserted for a minimum timeout period after VCC rises above the threshold. In addition, a watchdog timer monitors against code execution errors. A debounced manual reset is also available. The MAX6821–MAX6825 monitor voltages from +1.8V to +5.0V.
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