M95256 - ST Microelectronics

M95256 256-Kbit Serial SPI bus EEPROM

1 Description The M95256 devices are electrically erasable programmable memories (EEPROMs) organized as 32768 x 8 bits, accessed through the SPI bus. The M95256-W can operate with a supply voltage from 2.5 V to 5.5 V, the M95256-R can operate with a supply voltage from 1.8 V to 5.5 V and the M95256-DF can operate with a supply voltage from 1.7 V to 5.5 V,.

Features

• Compatible with the serial peripheral interface (SPI) bus
• Memory array
  – 256-Kbit (32 Kbytes) of EEPROM
  – Page size: 64 bytes
  – Additional write lockable page (Identification page)
• Write time
  – Byte Write within 5 ms
  – Page Write within 5 ms
• Write protect
  – quarter array
  – half array
  – whole memory array
• High-speed clock: 20 MHz
• Single supply voltage:
  – 2.5 V to 5.5 V for M95256-W
  – 1.8 V to 5.5 V for M95256-R
  – 1.7 V to 5.5 V for M95256-DF
• Operating temperature range: from -40 °C up to +85 °C
• Enhanced ESD protection
• More than 4 million Write cycles
• More than 200-year data .