Ordering Information

Part NumberPackageOrder Online
DS2431+ (View)TO-92
DS2431P+ (View)TSOC-6
DS2431 PDF Datasheet

Pin Configurations

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DS2431 Description

The DS2431 is a 1024-bit, 1-Wire® EEPROM chip organized as four memory pages of 256 bits each. Data is written to an 8-byte scratchpad, verified, and then copied to the EEPROM memory. As a special feature, the four memory pages can individually be write protected or put in EPROM-emulation mode, where bits can only be changed from a 1 to a 0 state. The DS2431 communicates over the single-conductor 1-Wire bus. The communication follows the standard Dallas Semiconductor 1-Wire protocol. Each device has its own unalterable and unique 64-bit ROM registration number that is factory lasered into the chip. The registration number is used to address the device in a multidrop 1-Wire net environment.

DS2431 Features
  • 1024 Bits of EEPROM Memory Partitioned into Four Pages of 256 Bits
  • Individual Memory Pages can be Permanently Write Protected or Put in EPROM-Emulation Mode ("Write to 0")
  • Switchpoint Hysteresis and Filtering to Optimize Performance in the Presence of Noise
  • IEC 1000-4-2 Level 4 ESD Protection (8kV Contact, 15kV Air, typical)
  • Reads and Writes Over a Wide Voltage Range of 2.8V to 5.25V from -40°C to +85°C
  • Communicates to Host with a Single Digital Signal at 15.4kbps or 125kbps Using 1-Wire Protocol
  • Also Available as Automotive Version Meeting AEC-Q100 Grade 1 Qualification Requirements (DS2431-A1)

DS2431 Parameters

DS2431 Key Parameters
Memory TypeEEPROM
Memory Size1K x 1
DS2431 Other Features
Bus Type1-Wire
Supply Voltage2.8V~5.25V
DS2431 Packages and Pinouts

DS2431 Applications
  • Accessory/PC Board Identification
  • Medical Sensor Calibration Data Storage
  • Analog Sensor Calibration Including IEEE-P1451.4 Smart Sensors
  • Ink and Toner Print Cartridge Identification
  • After-Market Management of Consumables