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AT27C256R-55JI

AT27C256R-55JI Description

The AT27C256R-55JI is an EPROM (Erasable Programmable Read-Only Memory) IC from Microchip Technology, designed for applications requiring reliable and non-volatile storage solutions. This memory chip features a parallel memory interface and is organized as 32K x 8, providing a total memory size of 256 Kbit. It operates within a supply voltage range of 4.5V to 5.5V and offers an access time of 55 ns, ensuring fast data retrieval. The AT27C256R-55JI is housed in a 32-pin PLCC (Plastic Leaded Chip Carrier) package and is suitable for surface mount applications. Although this product is now obsolete, it remains a notable option for legacy systems and specific applications where its unique features are advantageous.

AT27C256R-55JI Features

• Memory Organization: The AT27C256R-55JI is organized as 32K x 8, providing a total of 256 Kbit of memory. This organization allows for efficient storage and retrieval of data in a compact form factor.
• Access Time: With an access time of 55 ns, this EPROM ensures rapid data access, making it suitable for applications requiring quick read operations.
• Supply Voltage: The chip operates within a supply voltage range of 4.5V to 5.5V, providing flexibility in power supply requirements and ensuring compatibility with various systems.
• Parallel Interface: The parallel memory interface allows for high-speed data transfer and is well-suited for systems that require fast communication between the memory and the processor.
• Surface Mount: The surface mount mounting type facilitates easy integration into modern printed circuit boards (PCBs), enhancing the overall reliability and compactness of the design.
• Moisture Sensitivity Level (MSL): With an MSL of 2 (1 Year), the AT27C256R-55JI is designed to withstand moderate levels of moisture, ensuring reliability in various environmental conditions.
• Package Type: The 32PLCC package provides a robust and space-efficient solution, making it ideal for applications where board space is limited.

AT27C256R-55JI Applications

The AT27C256R-55JI is ideal for a variety of applications, particularly those requiring non-volatile memory storage with fast access times. Some specific use cases include:

• Embedded Systems: Ideal for embedded systems where reliable and non-volatile storage is essential for storing firmware or critical data.
• Industrial Control: Suitable for industrial control where applications fast data retrieval and robustness against environmental factors are crucial.
• Telecommunications: Can be used in telecommunication equipment for storing configuration data and firmware that need to be retained even when power is off.
• Consumer Electronics: Applicable in consumer electronics for storing boot-up routines and other critical data that must be preserved across power cycles.
• Legacy Systems: Given its status as an obsolete product, the AT27C256R-55JI is particularly useful for maintaining and upgrading legacy systems that rely on this specific memory architecture.

Conclusion of AT27C256R-55JI

The AT27C256R-55JI from Microchip Technology is a reliable and efficient EPROM solution, offering a balance of performance and compatibility. Its fast access time, parallel interface, and robust surface mount packaging make it a valuable component for a range of applications, from embedded systems to industrial control. Despite its obsolete status, the AT27C256R-55JI remains a viable option for specific use cases, particularly in legacy systems where its unique features and performance benefits are still highly relevant.