Electronic Component Solutions

Single-Wire Serial EEPROM Enables Remote Identification

A single-wire, two-pin Electrically Erasable Programmable Read-Only Memory (EEPROM) device with a 2.7V to 4.5V operational voltage range is now available from Microchip. The AT21CS11 is ideal for identifying and authenticating remote items, such as cartridges or cables, where space for electronic components is limited.

Features:

  • 128 x 8 (1 Kbit)
  • Single-Wire Compatible
    – I²C Protocol Structure
    – Communication through a single I/O pin
  • High Speed (125 kbps) Mode
  • Self-Timed Erase and Write Cycles (5 ms max.)
  • Low Power Consumption
    – Read current 0.08 mA (Typ), 0.3 mA (Max)
    – Write current 0.2 mA (Typ), 0.5 mA (Max)
    – Standby current 0.7 uA (Typ), 2.5 uA (Max)
  • Software Write Protection
    – Four independent 256-bit zones
  • More than 1 million erase/write cycles
  • Data retention > 100 years
  • ESD protection > 8000V (HBM)
  • Factory Programming Available
  • Available in 8-pin SOIC (150 mil), 3-pin SOT23, 2-pad XSFN, and 4-ball Thin CSP packages.

AT21CS11 Datasheet

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