Quick Detail:
Low-Voltage SOT23 μP Supervisors with Manual Reset and Watchdog Timer
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. 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.
Applications:
♦ 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 RESET
Push-Pull RESET
Open-Drain RESET
♦ Guaranteed Reset Valid to VCC = +1.0V
♦ Immune to Short Negative VCC Transients
♦ No External Components
♦ Small 5-Pin SOT23 Packages
Specifications:
|
part no. |
MAX6822MUKT |
|
Manufacturer |
Maxim Integrated Products |
|
supply ability |
10000 |
|
datecode |
10+ |
|
package |
SOT-23 |
|
remark |
new and original stock |
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