Smart Multi-Voltage Detector

The RT9823 is an integrated smart multi voltage detector supervising two power supply voltage levels including 5V, and another voltage (such as 3.3V or 12V) , which can be set via an external resistive voltage divider.
The RT9823 performs supervisory function by sending out a CTR signal whenever the monitored voltages fall below 80% of the voltage levels. The CTR signal will last the whole period before VCC recovers. Once the supervising voltages are recovered to higher than 80% of the voltage levels, the CTR signal will be released after a 300ms delay time.
MR (Manual Reset) controls the CTR signal when the two monitored power supply voltages are at normal voltage levels. When the MR signal is in logic high, the CTR signal will be pulled low immediately.
The RT9823 is available in a SOT-23-6 package.