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DS28EC20 - 20Kb 1-Wire EEPROM

General Description

The DS28EC20 is a 20480-bit, 1-Wire® EEPROM organized as 80 memory pages of 256 bits each.

An additional page is set aside for control functions.

Data is written to a 32-byte scratchpad, verified, and then copied to the EEPROM memory.

Key Features

  • 20480 Bits of Nonvolatile (NV) EEPROM Partitioned into Eighty 256-Bit Pages.
  • Individual 8-Page Groups of Memory Pages (Blocks) can be Permanently Write Protected or Put in OTP EPROM-Emulation Mode ("Write to 0").
  • Read and Write Access Highly Backward- Compatible to Legacy Devices (e. g. , DS2433).
  • 256-Bit Scratchpad with Strict Read/Write Protocols Ensures Integrity of Data Transfer.
  • 200k Write/Erase Cycle Endurance at +25°C.
  • Unique Factory-Programmed 64-Bit Registra.

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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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DS28EC20 20Kb 1-Wire EEPROM GENERAL DESCRIPTION The DS28EC20 is a 20480-bit, 1-Wire® EEPROM organized as 80 memory pages of 256 bits each. An additional page is set aside for control functions. Data is written to a 32-byte scratchpad, verified, and then copied to the EEPROM memory. As a special feature, blocks of eight memory pages can be write protected or put in EPROM-Emulation mode, where bits can only be changed from a 1 to a 0 state. The DS28EC20 communicates over the single-conductor 1-Wire bus. The communication follows the standard 1-Wire protocol. Each device has its own unalterable and unique 64-bit ROM registration number. The registration number is used to address the device in a multidrop 1-Wire net environment. APPLICATIONS Device Authentication IEEE 1451.