DP8573AV/NOPB

Overview

The DP8573AV/NOPB is a CMOS real-time clock (RTC) manufactured by Texas Instruments, designed for precise timekeeping in electronic systems. It features a parallel bus interface and supports both calendar and clock functions with a YY-MM-DD-dd date format and HH:MM:SS:hh time format. The device includes 32 bytes of static RAM for data storage and incorporates a backup switching mechanism to maintain operation during power transitions. It operates within a supply voltage range of 4.5 V to 5.5 V and is housed in a PLCC-28 package suitable for surface-mount installation. The component is rated for industrial temperatures from -40°C to +85°C.

Feature Summary

• Integrated parallel RTC with calendar and clock functionality
• 32-byte static RAM for user data storage
• Backup switching capability for uninterrupted timekeeping
• PLCC-28 surface-mount package

Applications

• Industrial control systems requiring accurate time synchronization
• Data logging equipment needing persistent timestamping
• Embedded systems with parallel interface constraints

Procurement Notes

Verify the specific suffix 'AV' against the manufacturer's latest datasheet to confirm pinout compatibility and electrical characteristics. Ensure that the parallel interface requirements match the host microcontroller's capabilities. Confirm RoHS compliance status through official documentation before integration into regulated assemblies.

Selection Notes

Select this component when a dedicated parallel-interface RTC is required rather than I2C or SPI alternatives. The 32-byte RAM provides sufficient space for basic data logging tasks. Consider the PLCC-28 footprint availability in the target PCB design. Verify that the 5V logic levels are compatible with the system's voltage domain.

Part Context

This part belongs to the DP8573A series of real-time clocks. It serves as a standalone timing solution for applications where parallel communication is preferred or necessary. The 'NOPB' suffix indicates lead-free packaging compliant with environmental standards. It is distinct from serial-interface RTCs found in modern low-power designs.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source material. Cross-referencing with other DP8573 variants requires verification of pin compatibility and interface differences.