28C64A-25B/YA

Overview

The Microchip Technology 28C64A-25B/YA is a parallel interface EEPROM memory integrated circuit. It provides a storage capacity of 64Kbits, organized as 8K words by 8 bits. The device features an access time of 250 ns and operates with a programming voltage of 5 V. This component is designed for non-volatile data retention in electronic systems requiring reliable storage.

Feature Summary

• Parallel memory interface for direct system integration
• Non-volatile EEPROM technology for persistent data storage
• Standard 5V programming voltage operation

Applications

• Embedded systems requiring non-volatile configuration storage
• Industrial control units needing parameter retention
• Consumer electronics with firmware or calibration data storage

Procurement Notes

Verify the manufacturer designation on official datasheets, as sourcing channels may list historical brand associations such as Actel or Micrel. Confirm the specific suffix /YA corresponds to the required package and temperature grade. Ensure compatibility with 5V logic levels before procurement. Cross-reference part numbers carefully to avoid confusion with similar density devices.

Selection Notes

Select this component when a parallel interface is required for straightforward microcontroller connection without complex serial protocols. The 250 ns access time suits applications where moderate speed is sufficient. Consider the 8K x 8 organization for byte-wide data handling needs. Evaluate power consumption requirements against other EEPROM families if low-power standby is critical.

Part Context

This part belongs to the broader family of 28C64 EEPROMs produced by Microchip Technology. It serves as a standard solution for legacy and modern embedded designs requiring robust, byte-addressable non-volatile memory. The device maintains compatibility with common parallel memory bus architectures used in various industrial and commercial electronic equipment.

Replacement Considerations

Check for equivalent parts from Rochester Electronics, such as the TMS28C64-25J, which shares similar electrical characteristics. Verify pinout compatibility and timing parameters before substitution. Ensure that any alternative device supports the same 5V programming voltage and parallel interface requirements.