The DS1836 MicroManager performs three vital system functions. First, a precision temperature-compensated reference and comparator circuit monitor the status of the voltage on V
CC and when an out-of-tolerance condition is detected, an internal power-fail signal is generated that forces the reset active. If V
CC continues to degrade, it switches to the battery supply when V
CC drops below 3.8V (2.6V for 3.3V versions). When V
CC exceeds 3.9V (2.8V for 3.3V versions); V
OUT will again be supplied from V
CC. Reset will remain active for 350 ms after V
CC returns to an in-tolerance condition.
Lastly, the DS1836 supports a sense input that sends a non-maskable interrupt whenever the sense input drops below 1.25V.
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