The M24M01E-U is a 1-Mbit I²C-compatible EEPROM (electrically erasable programmable memory) organized as 128 K × 8 bits. It can operate with a supply voltage from 1.6 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 three 8-bit registers, namely: the device type identifier (DTI) register, the configurable device address (CDA), and the software write protection (SWP) register.

The device also offers an additional 256-byte identification page. This page stores a 128‑bit (16‑byte) unique factory-programmed serial number, locked in read-only mode at factory delivery.

The uniqueness of the serial number is ensured across the whole portfolio of serial EEPROMs manufactured by STMicroelectronics, offering a unique identifier.

• I²C interface
  • Compatible with the following I²C bus modes:
    • 1 MHz (Fast-mode Plus)
    • 400 kHz (Fast-mode)
    • 100 kHz (Standard-mode)
• Memory
  • 1-Mbit (128-Kbyte) of EEPROM
  • Page size: 256-byte
• Identification page
  • 256-byte locked in read-only at factory delivery
• UID
  • 128-bit (16-byte) unique factory-programmed serial number
• Supply voltage
  • Wide voltage range: 1.6 V to 5.5 V
• Temperature
  • Operating temperature range: -40 °C to +85 °C
• Fast write cycle time
  • Byte and page write within 4 ms (typically 3 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
  • 350 nA (typical) in standby mode
  • 100 µA (typical) for read current
  • 400 µA (typical) for write current
• Advanced features
  • Configurable device address register
  • Device type identifier register (read-only)
  • Software write protection register
  • Hardware write protection of the whole memory array
  • Random and sequential read modes
• Packages
  • SO8N (ECOPACK2-compliant)