AT26F004-SSU

Series:	--
Packaging:	Tube
Part Status:	Obsolete
Memory Type:	Non-Volatile
Memory Format:	FLASH
Technology:	FLASH
Memory Size:	4Mb (256 Bytes x 2048 pages)
Clock Frequency:	33MHz
Write Cycle Time - Word, Page:	5ms
Memory Interface:	SPI
Voltage - Supply:	2.7 V ~ 3.6 V
Operating Temperature:	-40°C ~ 85°C (TC)
Mounting Type:	Surface Mount
Package / Case:	8-SOIC (0.154", 3.90mm Width)
Supplier Device Package:	8-SOIC

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.AT26F004-SSU Application Field and Working PrincipleThe AT26F004-SSU is a non-volatile flash memory and is among the most popular product-lines when it comes to flash memory solutions. It is most suitable for embedded MCU and microcontroller applications that require plenty of memory for their operations. With its Near-Field-Communication (NFC) technology, this memory can implement secure authentication techniques in embedded systems.Application Field of AT26F004-SSUAT26F004-SSU is used in many different embedded systems, of which the following are the most common ones:Smart Card Solutions: This high-security flash memory is suitable for Smart Card solutions for identification, authentication and contactless payments. With its NFC technology and electrically erasable features, it can securely store, retrieve and erase data within these applications.Smart Home Products: AT26F004-SSU is incorporated in many Smart Home products in order to store user data or provide extra memory to the product. It is suitable for IoT devices that need a reliable, secure memory that can store user data or program instructions between periods of sleep.Automotive: This flash memory is also suitable for automotive applications that require high security. It can be used to store user data or program instructions in order to provide the vehicle with extra features or make the driving experience more convenient.Medical Surveys: This memory is also suitable for medical surveys which require highly secure data storage. The AT26F004-SSU can be used in medical devices to securely store user data or program instructions for data collection, analysis and retrieval.Working Principle of AT26F004-SSUThe AT26F004-SSU flash memory is based on a NOR non-volatile memory array. It works on the principle of FLASH (Ferroelectric Layer Super-Lattice), which is a modified version of the MOS technology. FLASH is a type of floating gate which is use to store electrons that determine whether or not the current is switched on.The AT26F004-SSU uses two voltage levels, a program voltage and an erase voltage, to switch on and off the current in the flash memory cell. When a specific voltage is applied to the flash memory, electrons are transferred from the channel to the floating gate and the cell is programmed. When the erase voltage is applied to the floating gate, electrons are shifted back from the gate to the channel, thereby erasing the cell.The AT26F004-SSU also has a built-in controller and five bytes of secure authentication data, which provide extra security to the device. This allows the secure exchange of information between the user and the device. In order to ensure reliable operation, the memory has various features such as error detection and correction, Wear-Leveling, Auto Refresh, and Data Retention. Furthermore, the memory is also equipped with a Secure Authentication Credential (E-Credential TM) which is used to securely exchange sensitive data.ConclusionAT26F004-SSU is a high-security non-volatile flash memory which is suitable for many embedded systems and medical surveys. It is based on the FLASH memory cell and its Near-Field-Communication (NFC) technology enables secure authentication and data exchange. Additionally, the device has various features that make it reliable and secure for those applications.

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