AT28C256-15JA

Memory IC Overview

The AT28C256-15JA is a 256Kbit (32K x 8) electrically erasable programmable read-only memory manufactured by Microchip Technology. It features a parallel interface with a maximum access time of 150 ns and operates within a supply voltage range of 4.5V to 5.5V. The device utilizes CMOS technology, offering low power consumption with 50 mA active current and less than 200 µA standby current. It is housed in a 32-pin PLCC package and supports automatic page write operations for enhanced performance.

Memory IC Feature Summary

• Supports automatic page write operations with internal address and data latches for up to 64 bytes
• Includes hardware and software data protection mechanisms such as DATA Polling for end-of-write detection
• Features high reliability CMOS technology with long data retention capabilities

Memory IC Applications

• Nonvolatile storage for microcontroller systems
• Data logging applications requiring frequent updates
• Configuration storage in industrial control equipment

Memory IC Procurement Notes

Verify the specific suffix JA indicates the 32-lead PLCC package variant. Confirm export compliance requirements as this product may require additional documentation for shipment from the United States. Ensure the ordering part number matches the required temperature range and package style specified in the design.

Memory IC Selection Notes

Select this component when a 150 ns access time and 32K x 8 organization are required in a PLCC package. Consider the 10^4 or 10^5 cycle endurance rating for write-intensive applications. Verify compatibility with TTL and CMOS logic levels due to compatible inputs and outputs.

Memory IC Part Context

This part belongs to the AT28C256 series of high-performance EEPROMs. It is designed to be accessed like static RAM without external components. The series offers various package options including DIP, SOIC, and PLCC, catering to different board space and mounting requirements while maintaining consistent electrical characteristics across the family.

Memory IC Replacement Considerations

Compatible substitutes include other AT28C256 variants with different suffixes indicating package changes, such as AT28C256-15JU for PLCC-32 or AT28C256-15LM for LCC-32. Ensure the replacement maintains the 150 ns speed grade and 5V operation.