The M24256E-U is a 256-Kbit I²C-compatible EEPROM (electrically erasable programmable memory) organized as 32 K x 8 bits. It can operate with a supply voltage from 1.7 V to 5.5 V with a clock frequency up to 1 MHz, over an ambient temperature range from -40 °C to +85 °C.

The device offers an 8-bit register called the configurable device address (CDA).

The device also offers a 64-byte identification page. This additional page stores a 128‑bit (16‑byte) unique factory-programmed serial number, locked in read-only mode at factory delivery.

• I²C interface
  • Compatible with the following I²C bus modes:
    • 1 MHz (Fast-mode Plus)
    • 400 kHz (Fast-mode)
    • 100 kHz (Standard-mode)
• Memory
  • 256-Kbit (32-Kbyte) of EEPROM
  • Page size: 64-byte
• Identification page
  • 256-bit (32-byte) locked in read-only mode at factory delivery
• UID
  • 128-bit (16-byte) unique factory-programmed serial number
• Supply voltage
  • Wide voltage range: 1.7 V to 5.5 V
• Temperature
  • Operating temperature range: -40 °C to +85 °C
• Fast write cycle time
  • Byte and page write within 5 ms (typically 3.2 ms)
• Performance
  • Enhanced ESD/latch-up protection
  • More than 4 million write cycles
  • More than 200-year data retention
  • Fast wake-up time (less than 5 µs)
• Ultralow-power current consumption
  • 310 nA (typical) in standby mode
  • 100 µA (typical) for read current
  • 150 µA (typical) for write current
• Advanced features
  • Configurable device address register
  • Hardware write protection of the whole memory array
  • Random and sequential read modes
• Packages
  • SO8N (ECOPACK2-compliant)