DS2431:1024-Bit 1-Wire EEPROM

1Kb Serial EEPROM Operates from Single-Contact 1-Wire Interface

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 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.

Key Features
  • Easily Add Traceability and Relevant Information to Any Individual System
    • 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
  • Minimalist 1-Wire Interface Lowers Cost and Interface Complexity
    • IEC 1000-4-2 Level 4 ESD Protection (±8kV Contact, ±15kV Air, typ)
    • Reads and Writes Over a Wide Voltage Range from 2.8V to 5.25V from -40°C to +85°C
    • Communicates to Host with a Single Digital Signal at 15.4kbps or 125kbps
DS2431: Typical Operating Circuit
DS2431: Typical Operating Circuit
  • Accessory/PC Board Identification
  • After-Market Management of Consumables
  • Analog Sensor Calibration Including IEEEP 1451.4 Smart Sensors
  • Ink and Toner Print Cartridge Identification
  • Medical Sensor Calibration Data Storage
titleDownload file
DS2431 Data SheetDS2431.pdf
Part NumberApplicationsMemory TypeMemory SizeBus TypeVSUPPLY
minmaxSee Notes
DS2431Asset Tracking
Medical Consumable ID
PCB ID and Authentication
Peripheral ID and Control
Print Cartridge Authentication
Rack Card ID
EEPROM1K x 11-Wire2.85.25SFN/2
$0.70 @1k
Design kits & evaluation modules
Quality and Environmental Data
Ordering Information
Part NumberStatusRecommended ReplacementPackageTempRoHS
DS2431No Longer AvailableDS2431+TO92,;3 pin;19.5 mm²-40°C to +85°CNo
DS2431+ActiveTO92,;3 pin;19.5 mm²-40°C to +85°CLead Free
DS2431+T&RActiveTO92,;3 pin;27.6 mm²-40°C to +85°CLead Free
DS2431/T&RNo Longer AvailableDS2431+T&RTO92,;3 pin;27.6 mm²-40°C to +85°CNo
DS2431G+T&RActiveSFN,;2 pin;37.2 mm²-40°C to +85°CLead Free
DS2431G+UActiveSFN,;2 pin;37.2 mm²-40°C to +85°CLead Free
DS2431GA+T&RActiveSFN,;2 pin;23.8 mm²-40°C to +85°CLead Free
DS2431GA+UActiveSFN,;2 pin;23.8 mm²-40°C to +85°CLead Free
DS2431GB+TActiveSFN,;2 pin;17.9 mm²-40°C to +85°CLead Free
DS2431GB+UActiveSFN,;2 pin;17.9 mm²-40°C to +85°CLead Free
Part NumberStatusRecommended ReplacementPackageTempRoHS
DS2431P+ActiveTSOC,;6 pin;17.8 mm²-40°C to +85°CLead Free
DS2431P+T&RActiveTSOC,;6 pin;17.8 mm²-40°C to +85°CLead Free
DS2431P/T&RNo Longer AvailableDS2431P+T&RTSOC,;6 pin;17.8 mm²-40°C to +85°CNo
DS2431Q+T&RActiveTDFN-EP,;6 pin;9.6 mm²-40°C to +85°CLead Free
DS2431Q+UActiveTDFN-EP,;6 pin;9.6 mm²-40°C to +85°CLead Free
DS2431XNo Longer AvailableDS2431X-S+UCSPR;-40°C to +85°CSee data sheet
DS2431X+No Longer AvailableDS2431X-S+UCSP,;6 pin;3 mm²-40°C to +85°CLead Free
DS2431X+UActiveUCSP,;6 pin;3 mm²-40°C to +85°CLead Free
DS2431X-S+ActiveUCSP,;6 pin;3 mm²-40°C to +85°CLead Free
DS2431.pdf DS2431
DS2431_cn.pdf DS2431
DS2431.pdf DS2431
DS2431.pdf DS2431
Create a 1-Wire Master with Xilinx PicoBlaze DS1990A
Understanding the DS1WM Synthesizable 1-Wire Bus Master DS1923
How to Build a 1-Wire® Evaluation Kit DS9490R
Easily Add Memory, Security, Monitoring, and Control to Medical Sensors and Consumables DS24L65
Improve Sensor Performance and SNR in Pulse Oximeter Designs MAXQ622
Smart Cable Aids Quality Control and Authentication DS28E05
Package Thermal Resistance Values (Theta JA, Theta JC) for Temperature Sensors and 1-Wire Devices MAX31826
Minimal Remote 1-Wire® Master Protocol DS28E05
1-Wire Master Device Configuration DS1920
White Paper 5: Using 1-Wire APIs for Data Sheet Commands DS1921K
White Paper 2: Using the 1-Wire® Public Domain Kit DS9097U-S09
1-Wire File Structure DS1923
Reading and Writing 1-Wire® Devices Through Serial Interfaces DS1923
DS2431.pdf DS2431
DS2431_cn.pdf DS2431