1-Wire 4Kb EEPROM

With a Single Dedicated Contact, Easily Add EEPROM to Cables and Sensors to Store Nonvolatile Calibration Data

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The DS24B33 is a 4096-bit, 1-Wire® EEPROM organized as 16 memory pages of 256 bits each. Data is written to a 32-byte scratchpad, verified, and then copied to the EEPROM memory. The DS24B33 communicates over a single-conductor 1-Wire bus. The communication follows the standard 1-Wire protocol. Each device has its own unalterable and unique 64-bit registration number that is factory programmed into the chip. The registration number is used to address the device in a multidrop 1-Wire net environment. The DS24B33 is software compatible to the DS2433.

Key Features

  • 4096 Bits of Nonvolatile EEPROM Partitioned Into Sixteen 256-Bit Pages
  • Read and Write Access is Highly Backward-Compatible to the DS2433
  • 256-Bit Scratchpad with Strict Read/Write Protocols Ensures Integrity of Data Transfer
  • Unique, Factory-Programmed, 64-Bit Registration Number Ensures Error-Free Device Selection and Absolute Part Identity
  • Switchpoint Hysteresis to Optimize Performance in the Presence of Noise
  • Communicates to Host at 15.4kbps or 125kbps Using 1-Wire Protocol
  • Low-Cost Through-Hole and SMD Packages
  • Operating Range: +2.8V to +5.25V, -40°C to +85°C
  • IEC 1000-4-2 Level 4 ESD Protection (±8kV Contact, ±15kV Air, Typical) for IO Pin


  • Board Identification
  • Medical Sensor Calibration Data Storage
  • Smart Cables
  • Storage of Calibration Constants
  • Storage of Product Revision Status

Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.

DS9120: Socket Boards for Evaluating 1-Wire Devices
DS9120P: Socket Boards for Evaluating 1-Wire Devices
DS9120Q: Socket Boards for Evaluating 1-Wire Devices
DS9090EVKIT: 1-Wire Device Evaluation Kit
Product Reliability Reports: DS24B33.pdf 
Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C   Material Composition  

Note : The failure rates are summarized by technology and mapped to the associated material part numbers. The failure rates are highly dependent on the number of units tested.

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