The DS1230Y-120+ is a real-time clock/calendar timer module from Analog Devices. It is a low-power CMOS device that holds time, date, and other information in the form of BCD (binary coded decimal) format. It features a built-in power-fail detect circuit and a battery switchover circuit. It also has an integrated crystal oscillator and 32kHz output. It is designed to provide accurate time and date information in embedded systems applications, such as clocks, alarms, and timekeeping systems.