MAX6825
Low-Voltage SOT23 µP Supervisors with Manual Reset and Watchdog Timer
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Overview
Features and Benefits
- Monitors +1.8V, +2.5V, +3.0V, +3.3V, +5.0V Supplies
- 140ms (min) Reset Timeout Delay
- 1.6s Watchdog Timeout Period (MAX6821/MAX6822/MAX6823/MAX6824)
- Manual Reset Input (MAX6821/MAX6822/MAX6823/MAX6825)
- Three Reset Output Options
- Push-Pull Active-Low RESET
- Push-Pull RESET
- Open-Drain Active-Low RESET
- Guaranteed Reset Valid to VCC = +1.0V
- Immune to Short Negative VCC Transients
- No External Components
- Small 5-Pin SOT23 Packages
Product Details
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. These outputs are guaranteed to be in the correct state for VCC down to +1.0V.
Nine preprogrammed reset threshold voltages are available (see the 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 active-low RESET, and the MAX6823 has push-pull active-low RESET. The MAX6824 has a watchdog timer and both push-pull active-low RESET and push-pull RESET. The MAX6825 has a manual reset input and both push-pull active-low RESET and push-pull RESET. The Selector Guide explains the functions offered in this series of parts.
Applications
- Computers and Controllers
- Critical µP Monitoring
- Embedded Controllers
- Intelligent Instruments
- Portable Battery-Powered Equipment
- Set-Top Boxes
Product Categories
Product Lifecycle
Production
At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.
Documentation & Resources
Design Resources
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal.View our quality and reliability program and certifications for more information.
| Part Number | Material Declaration | Reliability Data | Pin/Package Drawing | CAD Symbols, Footprints & 3D Models |
|---|---|---|---|---|
| MAX6825LUK+ | Material Declaration | Reliability Data | 5-SOT_23-N/A | |
| MAX6825LUK+T | Material Declaration | Reliability Data | 5-SOT_23-N/A | |
| MAX6825SUK+ | Material Declaration | Reliability Data | 5-SOT_23-N/A | |
| MAX6825SUK+T | Material Declaration | Reliability Data | 5-SOT_23-N/A | |
| MAX6825VUK+ | Material Declaration | Reliability Data | 5-SOT_23-N/A | |
| MAX6825VUK+T | Material Declaration | Reliability Data | 5-SOT_23-N/A | |
| Wafer Fabrication Data |
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