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EEPROM suits identification applications

A single wire, two pin EEPROM from Microchip operates from a supply ranging from 2.7V to 4.5V, allowing it to operate in conjunction with systems powered by Li-ion batteries.

Called the AT21CS11, the part is said to be suitable for identifying and authenticating remote items, such as cartridges or cables, where space for electronic components is limited.

Each AT21CS11 contains both a pre-programmed unique serial number and five EEPROM sections. Any, or all, of the memory sections can be permanently locked by the OEM to allow tracking of products and the identification of attachments to assist with counterfeit prevention. The EEPROM is also said to be suitable for use by customers who need to warranty their product or prevent counterfeits and ensure proper continued operation of their goods through authorised replacements.

The device, which connects to a system through a single I/O wire that handles communication and power supply, has 1kbit of EEPROM (four sectors of 256bit), a 64bit serial number and 128bit for extra user-programmable tracking memory, which allows designers to add identification and operating parameters.

Graham Pitcher

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