The Microchip Technology Inc. 24AA256UID is a 256 Kbit Electrically Erasable PROM with a pre-programmed globally unique EUI-48™ and EUI-64™ IEEE MAC address. The device also has a pre-programmed 32-bit unique ID. This serial number is unique across all UID-Family of EEPROMs. The ID is Scalable to 48-bit, 64-bit, 128-bit, 256-bit, and other lengths. The 24AA256UID is a 32K x 8 (256 Kbit) SerialElectrically Erasable PROM, capable of operationacross a broad voltage range (1.8V to 5.5V). It hasbeen developed for advanced, low-power applicationssuch as personal communications or data acquisition.This device also has a page write capability of up to 64bytes of data. This device is capable of both randomand sequential reads up to the 256K boundary. The 24AA256UID device is avaliable in 8-SOIC, 8-PDIP and 8-TSSOP packages.

   Pre-programmed Codes

  Globally Unique 48-bit and 64-bit Node Addresses

  EUI-48™ & EUI-64™ compatible

  Pre-programmed 32-bit Serial Number (ID)

   Unique Across All UID-Family EEPROMs

   Scalable to 48-bit, 64-bit, 128-bit, 256-bit, and other lengths

  Stored in Permanently Write-ProtectedUpper 1/8th of EEPROM Array

  Reliable EEPROM Memory

  Self-Timed Erase/Write Cycle

  64-Byte Page Write Buffer

  Page Write Time 5 ms Max.

  Low Power

  Operating voltage 1.7V to 5.5V

  Read current 1 mA, max.

  Standby current 1 uA, max.

  2-Wire Serial Interface, I2C™ Compatible

  Cascadable up to Eight Devices

  Schmitt Trigger Inputs for Noise Suppression

  Output Slope Control to Eliminate Ground Bounce

  100 kHz and 400 kHz Clock Compatible

  ESD Protection >4000V

  Pb-Free and RoHS Compliant

  Packages Include 8-lead PDIP, SOIC and TSSOP