General Description
The MAX6826–MAX6831 are ultra-low-voltage microprocessor (µP)
supervisory circuits designed to monitor two power supplies and
have manual reset and watchdog input functions. These devices
assert a system reset if any of the monitored supplies fall below
the preprogrammed thresholds, and maintain reset for a minimum
timeout period after the supplies rise above the threshold.
Microprocessor supervisors significantly improve system reliability
and accuracy compared to separate ICs or discrete components. These
devices monitor primary voltages from +1.8V to +5.0V and secondary
voltages from +0.9V to +2.5V. These devices are guaranteed to be in
the correct state for VCC down to +1.0V.
Features
● Monitor Primary VCC Supplies from +1.8V
to +5.0V and Secondary VCC2 Supplies
from +0.9V to +2.5V
● User Adjustable RESET IN Down to +0.63V
(MAX6826/MAX6827/MAX6828)
● 140ms (min) Reset Timeout Delay
● 1.6s Watchdog Timeout Period
● Manual Reset Input
● Three Reset Output Options
Push-Pull RESET
Push-Pull RESET
Open-Drain RESET
● Guaranteed Reset Valid Down to VCC = +1.0V
● Immune to Short Negative VCC Transients
● No External Components
● Small 6-pin SOT23 Packages
Applications
● Portable/Battery Powered Equipment
● Embedded Controllers
● Intelligent Instruments
● Critical µP Monitoring
● Multivoltage Systems
