BUY UPD6252C https://www.utsource.net/itm/p/149215.html
Microcontroller
The UPD6252C is an 8-pin DIP (dual in-line package) IC manufactured by NEC. It is a low-voltage, low-power CMOS voltage detector designed for use in battery-powered systems. The UPD6252C is designed to detect an input voltage of 2.4V to 5.5V and output a low-level signal when the input voltage drops below a preset threshold. It features a low current consumption of 0.1μA (typical) and a wide operating temperature range of -40°C to +85°C. The UPD6252C is suitable for use in a variety of applications, including battery-powered systems, power supply monitoring, and over-voltage protection. (For reference only)