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MAX825 - 5-Pin Microprocessor Supervisory Circuits

General Description

The MAX823/MAX824/MAX825

microprocessor (µP) supervisory circuits combine reset output, watchdog, and manual-reset input functions in a 5-pin SOT23-5 package.

They significantly improve system reliability and accuracy compared to separate ICs or discrete components.

Key Features

  • o Precision Monitoring of +3V, +3.3V, and +5V Power Supplies o Operating Current: 10µA (MAX823L/M) 3µA (MAX825T/S/R) o Fully Specified Over Temperature o 140ms Min Power-On Reset o Guaranteed RESET Valid to VCC = 1V o Power-Supply Transient Immunity o Watchdog Timer with 1.6sec Timeout (MAX823/MAX824) o Manual-Reset Input (MAX823/MAX825) o No External Components MAX823/MAX824/MAX825 ________________________.

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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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19-0487; Rev 1; 6/97 5-Pin Microprocessor Supervisory Circuits _______________General Description The MAX823/MAX824/MAX825* microprocessor (µP) supervisory circuits combine reset output, watchdog, and manual-reset input functions in a 5-pin SOT23-5 package. They significantly improve system reliability and accuracy compared to separate ICs or discrete components. The MAX823/MAX824/MAX825 are specifically designed to ignore fast transients on VCC. Five preprogrammed reset threshold voltages are available, designated by the following package suffixes: L = 4.63V, M = 4.38V, T = 3.08V, S = 2.93V, and R = 2.63V. All three devices have an active-low reset output, which is guaranteed to be in the correct state for VCC down to 1V. The MAX824/MAX825 also have an active-high reset output.