28C64AX-20B/XA

Overview

The Microchip Technology 28C64AX-20B/XA is a 64Kbit (8K x 8) parallel EEPROM manufactured using CMOS technology. It features an asynchronous memory interface with a maximum access time of 200 ns and a word write cycle time of 1 ms. The device is housed in a bulk package and supports standard parallel data bus operations for non-volatile data storage applications.

Feature Summary

• Provides non-volatile data retention without requiring power
• Supports asynchronous parallel read and write operations
• Utilizes CMOS technology for low power consumption

Applications

• Industrial control systems requiring persistent configuration storage
• Consumer electronics needing parameter retention
• Embedded systems storing calibration data

Procurement Notes

Verify the specific suffix designation to confirm lead-free status and RoHS compliance, as these attributes vary by manufacturing lot and regional regulatory requirements. Ensure the selected package type matches the target PCB footprint and assembly process specifications before finalizing procurement orders.

Selection Notes

Select this component when a small capacity, parallel interface EEPROM is required for simple data logging or configuration storage. Consider the 200 ns access speed and 1 ms write cycle time against system timing constraints. Evaluate package availability and environmental compliance needs relative to the target application's operational temperature range.

Part Context

This part belongs to the 28C64 series of EEPROMs, which are widely used in legacy and modern embedded designs. The series offers a balance of density and interface simplicity, making it suitable for applications where high-speed serial interfaces are unnecessary but non-volatile storage is critical for system operation.

Replacement Considerations

Direct replacements include the CAT28C64BX-20 from Catalyst Semiconductor, which shares identical electrical characteristics and pinout compatibility. Verify that any substitute maintains the same voltage supply requirements and package dimensions to ensure seamless integration into existing hardware designs.