28C64AX-15B/UC

Overview

The Microchip Technology 28C64AX-15B/UC is a 64Kbit (8K x 8) parallel EEPROM housed in a 28-pin SOIC package. It features a 150 ns access time and operates within a 4.5V to 5.5V supply range. The device supports single-voltage operation with self-timed write cycles of 1ms. It offers 10-year data retention and functions between -40°C and +85°C.

Feature Summary

• Non-volatile storage architecture retaining data without power
• Parallel interface for direct system bus connectivity
• Self-timed write cycle mechanism for simplified control logic

Applications

• Industrial control systems requiring non-volatile parameter storage
• Embedded firmware configuration retention
• Data logging applications in commercial electronics

Procurement Notes

Verify the specific suffix 'UC' against the official Microchip datasheet to confirm package type and temperature grade. Ensure compatibility with existing board layouts for the 28-pin SOIC footprint. Cross-reference electrical specifications with the target system voltage requirements before integration.

Selection Notes

Select this component when a parallel interface is required for legacy or simple microcontroller architectures. Consider the 150 ns access speed for timing constraints. Evaluate the 28-pin SOIC form factor against available PCB space. Confirm that the 4.5V minimum supply aligns with the system's power rails.

Part Context

This part belongs to the AT28C64B series of electrically erasable programmable read-only memories. It provides a cost-effective solution for storing small amounts of critical data in embedded environments. The series is known for reliability and standard parallel interface compatibility across various industrial and consumer applications.

Replacement Considerations

Check for AT28C64B-15SU as a potential alternative from the same manufacturer family, ensuring pinout and electrical specifications match exactly.