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Serial EEPROMs target standard buses

Posted: 12 Dec 2008 ?? ?Print Version ?Bookmark and Share

Keywords:EEPROM? bus standard? MAC address?

Microchip Technology Inc.'s serial EEPROM devices with built-in EUI-48 and EUI-64 compatible MAC addresses are designed to work on standard buses such as SPI, I?C and the UNI/O bus.

The devices provide easy and inexpensive access to MAC addresses, and feature up to 1.5Kbit of EEPROM that can be used for storing configuration and user settings or as a scratch-pad area for buffering small amounts of data.

The devices can be ordered when needed without volume restrictions and, because they eliminate the need for designers to burn a unique MAC address into every MCU, they enable quick integration and shorter time-to-market at lower costs.

The 24AA02E48, 25AA02E48 and 11AA02E48 serial EEPROM devices have a built-in 48bit Extended Unique Identifier (EUI) that is needed to identify the network hardware's physical address. These built-in MAC addresses enable designers to buy addresses only when needed, and also eliminate the need for serialization and programming. The address is also EUI-64 compatible, and it is write-protected to ensure tamper-proof designs.

The 24AA02E48 I?C device is available in 5-pin SOT-23 and SOIC packages for $0.20 each, in 10,000-unit quantities. Samples are available today. The 25AA02E48 SPI device is expected to be available in 6-pin SOT-23 and SOIC packages, for $0.31 each in 10,000-unit quantities. The 11AA02E48 UNI/O device is expected to be available in 3-pin SOT-23 and SOIC packages, for $0.25 each in 10,000-unit quantities. Samples of these devices in the 8-pin SOIC package are available today. Samples of the SOT-23 package and volume production quantities are expected to be available in February 2009.

- Ismini Scouras

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