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Analog/Mixed Signal

Microchip Introduces a Single-Wire EEPROM for Remote Identification

05 December 2017

Microchip has introduced a new Serial EEPROM. The new device utilizes a single-wire bus using only two pins to access the device: SI/O and GRN. The first pin, SI/O, is a line that combines power and data, providing the needed power to the device and the management of the data.

Source: MicrochipSource: Microchip

The AT21CS11 is organized as one block of 128 x 8, and it is optimized for use in reliable, non-volatile memory storage applications. The chip includes a preprogrammed unique serial number (ID) and a 128-bit user-programmable tracking number. The operating voltage range is 2.7 to 4.5V, making it suitable for use with lithium-ion batteries.

The AT21CS11 brings identification and tracking to any detachable, replaceable piece of a product. Cartridges, plastic disposables, user-specific attachments and others can communicate unique ID details and use information over a simple two-point clip or plug-in connection. In addition, Microchip's dedicated evaluation kit for the AT21CSxx single-wire family supports the new device

Some of the AT21CS11's important features include the following:

  • 128 x 8 (1 Kbit)
  • Single-wire compatible
    • I²C protocol structure
    • Communication through a single I/O pin
  • High speed (125 kbps) mode
  • Self-rimed 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 greater than 100 years
  • ESD protection greater than 8000V (HBM)
  • Factory programming available
  • Available in 8-pin SOIC (150 mil), 3-pin SOT23, 2-pad XSFN, and 4-ball Thin CSP packages.
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