What is a voltage detector, Switching Circuit in Battery Backup, voltage detection - tatanh1983/conchodom GitHub Wiki

TC54 Series 2.7 V Threshold 10 V Supply CMOS Voltage Detector - SOT-23A-3 https://www.futureelectronics.com/p/semiconductors--analog--system-management--voltage-detectors/tc54vn2702ecb713-microchip-1309020