The M24256 is a 256-Kbit I²C-compatible EEPROM (electrically erasable programmable memory) organized as 32 K × 8 bits.

The M24256-BW can operate with a supply voltage from 2.5 V to 5.5 V, the M24256-BR AND M24256-DR can operate with a supply voltage from 1.8 V to 5.5 V, and the M24256-BF and M24256-DF can operate with a supply voltage from 1.7 V to 5.5 V. All these devices operate with a clock frequency of 1 MHz (or less), over an ambient temperature range of –40 °C / +85 °C. The M24256-D offers an additional page, named the identification page (64 byte). The identification page can be used to store sensitive application parameters which can be (later) permanently locked in read-only mode.

• Packages
  • Compatible with following I²C bus modes:
    
    • 1 MHz
    • 400 kHz
    • 100 kHz
  • Memory array:
    
    • 256 Kbit (32 Kbyte) of EEPROM
    • Page size: 64 byte
    • Additional write lockable page (M24256-D order codes)
  • Single supply voltage and high speed:
    
    • 1 MHz clock from 1.7 V to 5.5 V
  • Write:
    
    • Byte write within 5 ms
    • Page write within 5 ms
  • Operating temperature range:
    
    • from -40 °C up to +85 °C
  • Random and sequential read modes
  • Write protect of the whole memory array
    
  • Enhanced ESD/latch-Up protection
  • More than 4 million write cycles
  • More than 200-years data retention
    
  • RoHS-compliant and Halogen-free (ECOPACK2)
  • SO8 ECOPACK2
  • TSSOP8 ECOPACK2
  • UFDFPN8 ECOPACK2
  • WLCSP ECOPACK2
  • Unsawn wafer (each die is tested)