SST39SF020A-55-4C-NHE

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Memory is a storage device used to store programs and data for computing devices. A memory chip with code SST39SF020A-55-4C-NHE is ideal for most digital applications. This article focuses on its application field and working principle.

Application Field of SST39SF020A-55-4C-NHE

SST39SF020A-55-4C-NHE is a 2M bit Flash memory chip which is suitable for embedded applications like telecommunication, navigation systems, medical devices, 5G internet infrastructure in factories, document capturing and machine vision, etc. It features an improved low current read and increased endurance, as well as improved electrical characteristics. The wide temperature range makes it suitable for industrial use.

Built on 55 nm CMOS logic process, SST39SF020A-55-4C-NHE includes many innovative technologies such as low-voltage boot-up, over voltage protection, rising edge input latch, RAM write cache, etc., which makes it the most suitable device for modern applications. It is compatible with a wide range of interface protocols like LPC (Low Pin Count), Portable Flashing System, Utra DMA, etc. All these features make it a perfect choice for embedded applications.

Working Principle of SST39SF020A-55-4C-NHE

SST39SF020A-55-4C-NHE uses a NAND Flash memory cell, which consists of a floating-gate field-effect transistor. A single memory cell is capable of storing one bit of data - 0 or 1. Data is stored in the form of electric charge, which is moved between the source and the drain by modulating the amount of current flowing through the transistor’s channel. When the amount of charge is low, the transistor is said to be “on” and results in a logical 1, whereas when the charge is high, the transistor is “off” and results in a logical 0.

Accessing a non-volatile NAND Flash memory requires special techniques. While traditional random access memories (RAMs) access data by simply entering an address, NAND Flash requires special algorithms to avoid having to erase an entire block of cells, which would undoubtedly be extremely slow and inefficient. In fact, NAND Flash memory devices and the corresponding algorithms have been designed and optimized specifically to minimize the average access time.

The SST39SF020A-55-4C-NHE is a 64MB NAND Flash memory chip. An array is divided into 8 columns and 8K blocks and allows random access, programming and erasure operations. It supports both resident and non-resident external code execution modes, which can be enabled by setting the “~RESET pin” of the chip to high during boot-up. The chip also supports a programmable timeout counter for fast access and multiple sector address programming.

Conclusion

In conclusion, SST39SF020A-55-4C-NHE is an embedded Flash memory chip with a wide application range and advanced technologies. Its NAND architecture and advanced algorithms guarantee fast memory access and maximum efficiency. Therefore, it is the ideal choice for many embedded applications.

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