DS24B33:1-Wire 4Kb EEPROM

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

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
titleDownload file
DS24B33 Data SheetDS24B33.pdf
Part NumberApplicationsMemory TypeMemory SizeBus TypeVSUPPLY
minmaxSee Notes
DS24B33Print Cartridge AuthenticationEEPROM4K x 11-Wire2.85.25SFN/2
$1.42 @1k
Design kits & evaluation modules
Quality and Environmental Data
Related Products
Ordering Information
Part NumberStatusRecommended ReplacementPackageTempRoHS
DS24B33+ActiveTO92,;3 pin;19.5 mm²-40°C to +85°CLead Free
DS24B33+T&RActiveTO92,;3 pin;27.6 mm²-40°C to +85°CLead Free
DS24B33G+T&RActiveSFN,;2 pin;37.2 mm²-40°C to +85°CLead Free
DS24B33G+UActiveSFN,;2 pin;37.2 mm²-40°C to +85°CLead Free
DS24B33Q+T&RActiveTDFN-EP,;6 pin;9.6 mm²-40°C to +85°CLead Free
DS24B33Q+UActiveTDFN-EP,;6 pin;9.6 mm²-40°C to +85°CLead Free
DS24B33S+ActiveSOIC,;8 pin;44.1 mm²-40°C to +85°CLead Free
DS24B33S+T&RActiveSOIC,;8 pin;44.1 mm²-40°C to +85°CLead Free
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