Intel TE28F320C3BD70: A Comprehensive Technical Overview of the 32Mb Flash Memory Chip

The Intel TE28F320C3BD70 stands as a significant milestone in the evolution of non-volatile memory, representing a robust and reliable 32-megabit (4MB) flash memory solution from a leading semiconductor manufacturer. This chip, built on advanced technology for its time, was engineered to meet the demanding requirements of a wide array of embedded systems, networking equipment, and telecommunications infrastructure.

Architecture and Core Technology

At its heart, the TE28F320C3BD70 is organized as 4,194,304 words by 8 bits, providing a total storage capacity of 32 megabits. This x8 data bus configuration simplifies interface design with microprocessors and microcontrollers. The memory array is divided into multiple 64Kbyte blocks. This block-wise architecture is crucial as it enables individual block erase functionality, allowing specific sectors of memory to be erased and reprogrammed without affecting the data stored in other blocks. This is a fundamental feature for efficient firmware updates and data storage management in embedded applications.

Key Features and Performance

This device is renowned for its superior reliability and endurance. It supports a minimum of 100,000 program/erase cycles per block, ensuring long-term data integrity and device longevity in write-intensive applications. Its data retention capability is rated for over 20 years, guaranteeing that stored information remains secure without power for extended periods.

The chip operates on a single 3.3V VCC power supply, making it a low-power solution suitable for modern electronic designs. It offers access times as fast as 70ns, providing adequate speed for many real-time systems. Furthermore, it incorporates a write state machine that automates the complex algorithms for programming and erasure, significantly reducing the burden on the host processor and simplifying system design.

Command Set and Interface

The TE28F320C3BD70 utilizes a standard JEDEC-compliant command set, ensuring compatibility and ease of integration. The interface allows for simple reading, similar to an EPROM, while writing requires a specific command sequence to initiate programming or erase operations. This protects the memory from accidental writes caused by system noise or software malfunctions.

Applications and Legacy

This memory chip found its primary use in applications where reliability was paramount. It was a common choice for storing boot code and operating system kernels in devices such as routers, switches, set-top boxes, and industrial control systems. Its ability to be updated in-circuit made it ideal for products requiring field firmware upgrades. While surpassed in density and speed by modern NAND and NOR flash, the design principles and reliability standards of the TE28F320C3BD70 set a benchmark for future memory technologies.

ICGOOODFIND

ICGOOODFIND: The Intel TE28F320C3BD70 is a quintessential example of high-performance, reliable NOR Flash memory. Its block-erase architecture, low-voltage operation, and exceptional endurance made it a cornerstone component in 32-bit embedded systems of its era. For engineers and collectors alike, it remains a noteworthy device that highlights Intel's pivotal role in advancing non-volatile memory technology.

Keywords:

1. NOR Flash Memory

2. Block Erase

3. 3.3V Power Supply

4. Embedded Systems

5. Non-volatile Storage