Intel PC28F320J3F75 32Mb (4Mx8) 3V Flash Memory: Datasheet, Features, and Applications

The Intel PC28F320J3F75 is a prominent 32-megabit (4M x 8) 3-volt-only flash memory device, engineered for systems requiring reliable non-volatile storage. As a part of Intel's renowned advanced+ Boot Block family, this memory chip is designed with a focus on flexible architecture and high performance, making it a suitable solution for a wide range of embedded applications.

A review of its datasheet reveals a device organized as 4,194,304 bits, configured in a byte-wide (x8) format. It operates on a single 3.0V to 3.6V power supply for all read, program, and erase operations, simplifying power management design. The device offers fast access times, with the `F75` speed grade offering a 75ns maximum access time, enabling efficient system performance. It features a write state machine that automates the complex algorithms for programming and erasure, significantly reducing the overhead on the host processor.

Key features that define the PC28F320J3F75 include its asymmetrically-blocked architecture. The memory array is divided into multiple blocks, including parameter and main blocks. This includes:

Eight 4-KByte parameter blocks for storing frequently updated small data sets.

Two 32-KByte main blocks.

One 16-KByte main block.

Seven 64-KByte main blocks.

This flexible partitioning is ideal for storing different types of information, such as boot code, operating system, and application data, each with its own update frequency and size requirements. Furthermore, the device incorporates advanced command set compatibility with JEDEC standards, ensuring ease of integration. It also provides robust data protection with hardware and software lockout features to prevent accidental writes to critical memory sections.

The applications for this flash memory chip are extensive. Its reliability and performance made it a cornerstone in:

Telecommunications Equipment: Storing firmware and configuration data in routers, switches, and base stations.

Automotive Systems: Used in engine control units (ECUs) and infotainment systems where non-volatility and temperature tolerance are critical.

Industrial Control and Automation: Providing solid-state storage for program code in PLCs and embedded controllers.

Consumer Electronics: Found in set-top boxes, printers, and other devices requiring a stable boot memory solution.

Legacy Computer Systems: Serving as a firmware hub (FWH) or BIOS storage in older servers and desktop computers.

ICGOODFIND Summary: The Intel PC28F320J3F75 stands as a robust and versatile 3V flash memory solution. Its balanced combination of a flexible boot block architecture, fast access times, and strong data protection mechanisms cemented its role as a reliable component for code and data storage in countless embedded systems across automotive, industrial, and communication fields.

Keywords: Flash Memory, 3V, Boot Block, Embedded Systems, Non-volatile Storage.