Intel JS28F320J3D75 32Mb 3V Flash Memory Chip: A Comprehensive Technical Overview
The Intel JS28F320J3D75 stands as a significant component within the landscape of non-volatile memory solutions. This 32-megabit (4-megabyte) 3.0-volt single power supply flash memory chip was engineered for a broad range of applications, from embedded systems and networking hardware to industrial controllers and telecommunications infrastructure. Its design reflects a pivotal era in flash memory technology, balancing performance, density, and reliability.
Fabricated on Intel's advanced 0.13-micron process technology, the JS28F320J3D75 is organized as 32,768 Kbits, configured as 65,536 words by 16 bits or 131,072 words by 8 bits (via the BYTE pin). This flexible data width allows for efficient interfacing with both 8-bit and 16-bit microprocessors, enhancing its versatility in system design. A key architectural feature is its symmetric memory array structure, divided into 64 uniform 64-Kbyte blocks. This uniformity is critical as it enables individual block erase, lock, and program operations, providing system designers with fine-grained control over memory management and data protection.
Performance is a central tenet of its design. The chip offers fast access times, with 70ns and 90ns speed grades available, ensuring minimal wait states for high-performance processors. Its write operations are equally robust, featuring a 1.8µs per byte/word program time and a 0.7s typical block erase time. These specifications facilitate rapid firmware updates and efficient storage of operational parameters. The device operates on a single 3.0V power supply for all read, program, and erase operations, simplifying power management circuitry and reducing overall system power consumption.
Beyond raw speed, the JS28F320J3D75 incorporates a suite of features aimed at enhancing reliability and simplifying integration. It supports the Common Flash Memory Interface (CFI), which allows host software to automatically query the device to determine its architecture and electrical parameters. This plug-and-play capability streamlines system design and firmware development. For data integrity, it includes a 64-word Write State Machine (WSM) that automates the complex algorithms for programming and erasure, insulating the host processor from these tasks and minimizing the potential for error. Furthermore, it offers advanced software data protection mechanisms and hardware-enforced block locking to prevent accidental or malicious writes to critical boot code or sensitive data.
In summary, the Intel JS28F320J3D75 is a highly integrated, reliable, and performant flash memory solution. Its combination of a symmetric block architecture, fast access and write times, and advanced management features made it a cornerstone component for demanding electronic systems of its generation.
ICGOOODFIND: The Intel JS28F320J3D75 is a quintessential 3V flash memory device, prized for its robust performance, symmetric block architecture for flexible memory management, and advanced features like CFI support that ensure reliability and ease of integration in complex embedded systems.
Keywords: Flash Memory, Non-Volatile, 3.0V Supply, Block Erase, Common Flash Interface (CFI)
