Description
The Microchip Technology Inc. 24AA256UID is a 32K x 8 (256 Kbit) Serial Electrically Erasable PROM with pre-programmed EUI-48 and EUI-64 node addresses and a 32-bit Unique ID, capable of operation across a broad voltage range (1.7V to 5.5V). This device also has a page write capability of up to 64 bytes of data. This device is available in the standard 8-pin plastic DIP, SOIC and TSSOP packages.

Features
• Pre-Programmed 32-Bit Serial Number:
   - Unique across all UID-family EEPROMs
   - Scalable to 48-bit, 64-bit, 128-bit, 256-bit,
      and other lengths
• Pre-Programmed Globally Unique, 48-bit or 64-bit
   Node Address:
   - Compatible with EUI-48™ and EUI-64™
• Codes Stored in Permanently Write-Protected
   Upper 1/8th of EEPROM Array
• Single Supply with Operation Down to 1.7V
• Low-Power CMOS Technology:
   - Active current 400 µA, typical
   - Standby current 100 nA, typical
• 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 Compatibility
• Page Write Time 5 ms Maximum
• Self-Timed Erase/Write Cycle
• 64-Byte Page Write Buffer
• ESD Protection >4000V
• More than One Million Erase/Write Cycles
• Data Retention >200 years
• Packages Include 8-lead PDIP, SOIC and TSSOP
• RoHS Compliant
• Temperature Ranges:
   - Industrial (I): -40°C to +85°C