The AT28HC64B-70SU: A High-Speed Parallel EEPROM for Demanding Applications
In the realm of embedded systems and legacy computing, the need for reliable, non-volatile memory with fast read access remains critical. The AT28HC64B-70SU-T from Microchip Technology stands as a robust solution, delivering high-performance storage in a convenient parallel interface package. This 64K (8K x 8) EEPROM is engineered for applications where speed and data integrity are paramount.
A key feature of this memory IC is its impressive 70ns maximum access time. This speed is essential for systems that cannot tolerate wait states, allowing microprocessors to read data at full speed without bottlenecking the memory bus. The device operates on a single 5V power supply, making it compatible with a vast array of classic and modern digital logic systems.
The parallel interface provides a straightforward memory solution, offering a direct 8-bit data bus and 13 address lines for immediate access to any of its 8192 bytes. This simplicity eliminates the protocol overhead of serial memories, making it ideal for memory-mapped systems or as a fast boot ROM. Furthermore, the AT28HC64B incorporates advanced data protection features. These include both hardware and software data protection mechanisms that safeguard against inadvertent writes, ensuring the stability of critical firmware or configuration data.
While the write time is significantly longer than the read time—a characteristic of EEPROM technology—the device supports a page write mode, allowing up to 64 bytes to be written in a single cycle, which greatly improves write efficiency. Its commercial temperature range (0°C to 70°C) and SU package option ensure its suitability for a broad spectrum of industrial and commercial environments.
ICGOOODFIND: The AT28HC64B-70SU-T is a high-performance parallel EEPROM that excels in applications requiring fast, random read access and robust data security, making it a dependable choice for firmware storage, configuration memory, and legacy system support.
Keywords: Parallel EEPROM, 70ns Access Time, 5V Operation, 64K Memory, Data Protection
