RTC for industrial timing — parallel interface, battery-backed
The Texas Instruments DP8573AV/NOPB is a real-time clock/calendar IC in a 28-PLCC surface-mount package. It tracks time in HH:MM:SS:hh format (12/24 hour selectable) and date in YY-MM-DD-dd, with integrated alarm and leap-year compensation. The parallel interface suits designs where a microcontroller reads and writes time registers over a shared address/data bus — common in industrial controllers, embedded instrumentation, and telecom line cards that need a hardware timebase independent of the main processor.