DP8573AVX

Overview

The DP8573AVX is a CMOS real-time clock (RTC) manufactured by Texas Instruments, formerly National Semiconductor. It operates within a supply voltage range of 4.5 V to 5.5 V and functions in temperatures from -40°C to +85°C. The device utilizes a parallel bus interface and provides calendar and timekeeping functions with a date format of YY-MM-DD-dd and time format of HH:MM:SS:hh. It includes 32 bytes of static RAM for data storage and features a backup switching mechanism to maintain operation during power transitions.

Feature Summary

• Parallel bus interface for system communication
• Integrated 32-byte static RAM for user data
• Backup switching capability for continuous operation
• PLCC-28 surface-mount package

Applications

• Industrial control systems requiring precise timekeeping
• Data logging equipment with battery backup needs
• Embedded systems utilizing parallel interfaces

Procurement Notes

Verify the manufacturer designation, as Texas Instruments acquired National Semiconductor. Confirm the specific suffix 'AVX' against official datasheets to ensure correct packaging and temperature grade specifications before procurement.

Selection Notes

Select this component when a parallel interface RTC is required instead of serial alternatives like I2C or SPI. Ensure the host system supports the necessary parallel address and data lines. Verify that the 5V logic levels are compatible with the target microcontroller or processor.

Part Context

This part belongs to the DP8573A series of real-time clocks. It is functionally equivalent to other variants in the family, such as the DP8573AM, differing primarily in package type and manufacturing origin history between National Semiconductor and Texas Instruments.

Replacement Considerations

Direct substitutes include the DP8573AM and DP8573AV/NOPB. Verify pin compatibility and electrical parameters when replacing across different package styles or manufacturer designations.