The RC0802A-FHY-CSV is a surface mount real-time clock and calendar from Raystar, one of the leading manufacturers of integrated circuit products. The clock operates on a 3V lithium battery, and includes an integrated power-fail detection circuit to ensure accuracy and reliability. It includes a built-in ultra-low power crystal oscillator and 15 calendar registers, allowing for accurate and reliable timekeeping even in the event of a power failure. The clock also provides temperature-compensation to ensure data accuracy over a wide range of temperatures, making it suitable for applications that require precise timing. The RC0802A-FHY-CSV is ideal for applications such as automotive and medical systems, industrial equipment, and data logging applications.