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DS24B33
iButton and 1-Wire Memory DS24B33
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DS24B33

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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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Product Details

See parametric specs for Memory (EPROM, EEPROM, ROM, NV SRAM)

Key Features

See parametric specs for Memory (EPROM, EEPROM, ROM, NV SRAM)
Parametric specs for Memory (EPROM, EEPROM, ROM, NV SRAM)
End Equipment Print Cartridge Authentication
Memory Type EEPROM
Memory Size 4K x 1
Bus Type 1-Wire
VSUPPLY (V) (min) 2.8
VSUPPLY (V) (max) 5.25
Package/Pins SFN/2
SOIC (W)/8
TDFN/6
TO92/3
Budgetary
Price (See Notes) 		1.74
See parametric specs for Memory (EPROM, EEPROM, ROM, NV SRAM)
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Simplified Block Diagram

Technical Docs

Data Sheet 1-Wire 4Kb EEPROM Jun 13, 2012
App Note Using 1-Wire for Flexible Electro-Mechanical Contact Applications
App Note Communication Noise Immunity of 1-Wire
App Note Wirelessly Powering and Accessing a 1-Wire Network
App Note Transitioning from the DS2433 to the DS24B33 4Kb 1-Wire® EEPROM
App Note Understanding the DS1WM Synthesizable 1-Wire Bus Master
Tutorial Guidelines for Reliable Long Line 1-Wire Networks
Tutorial How to Build a 1-Wire® Evaluation Kit

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .

Parameters

Parametric specs for Memory (EPROM, EEPROM, ROM, NV SRAM)
End Equipment Print Cartridge Authentication
Memory Type EEPROM
Memory Size 4K x 1
Bus Type 1-Wire
VSUPPLY (V) (min) 2.8
VSUPPLY (V) (max) 5.25
Package/Pins SFN/2
SOIC (W)/8
TDFN/6
TO92/3
Budgetary
Price (See Notes) 		1.74
See parametric specs for Memory (EPROM, EEPROM, ROM, NV SRAM)

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

Applications/Uses

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

Description

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.

Simplified Block Diagram

Technical Docs

Data Sheet 1-Wire 4Kb EEPROM Jun 13, 2012
App Note Using 1-Wire for Flexible Electro-Mechanical Contact Applications
App Note Communication Noise Immunity of 1-Wire
App Note Wirelessly Powering and Accessing a 1-Wire Network
App Note Transitioning from the DS2433 to the DS24B33 4Kb 1-Wire® EEPROM
App Note Understanding the DS1WM Synthesizable 1-Wire Bus Master
Tutorial Guidelines for Reliable Long Line 1-Wire Networks
Tutorial How to Build a 1-Wire® Evaluation Kit

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .