MAX6823 Datasheet | Maxim Integrated

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 bine voltage monitoring, watchdog timer, and manual reset input functions in a 5-pin SOT23 package. Microprocessor supervisory circuits significantly improve system reliability and accuracy pared to separate ICs or discrete ponents. 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. These outputs are guaranteed to be in the correct state for VCC down to +1.0V. Nine preprogrammed reset threshold voltages are available (see Threshold Suffix Guide). The MAX6821, MAX6822, and MAX6823 all have a manual reset input and a watchdog timer. The MAX6821 has push-pull RESET, the MAX6822 has open-drain RESET, and the MAX6823 has push-pull RESET. The MAX6824 has a watchdog timer and both push-pull RESET and pushpull RESET. The MAX6825 has a manual reset input and both push-pull RESET and push-pull RESET. The Selector Guide explains the functions offered in this series of parts. 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 ponents o Small 5-Pin SOT23 Packages MAX6821- MAX6825 Ordering Information PART- MAX6821 _UK-T MAX6822 _UK-T MAX6823 _UK-T MAX6824 _UK-T MAX6825 _UK-T TEMP. RANGE -40°C to +125°C -40°C to +125°C -40°C to +125°C...