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iButton and 1-Wire Memory DS2431
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DS2431

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1024-Bit 1-Wire EEPROM

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

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Product Details

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

Key Features

Applications/Uses

See parametric specs for Memory (EPROM, EEPROM, ROM, NV SRAM)
Parametric specs for Memory (EPROM, EEPROM, ROM, NV SRAM)
End Equipment Asset Tracking
Inventory
Medical Consumable ID
PCB ID and Authentication
Peripheral ID and Control
Print Cartridge Authentication
Rack Card ID
Security
Memory Type EEPROM
Memory Size 1K x 1
Bus Type 1-Wire
VSUPPLY (V) (min) 2.8
VSUPPLY (V) (max) 5.25
Package/Pins SFN/2
TDFN/6
TO92/3
TSOC/6
UCSP (R)/6
ULTRA THIN SFN/2
Budgetary
Price (See Notes) 		0.8
See parametric specs for Memory (EPROM, EEPROM, ROM, NV SRAM)
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Simplified Block Diagram

Technical Docs

Data Sheet 1024-Bit 1-Wire EEPROM May 14, 2021
App Note How to Level Shift 1-Wire Systems | Maxim Integrated
App Note Using 1-Wire for Flexible Electro-Mechanical Contact Applications
App Note Understanding and Using Cyclic Redundancy Checks with Maxim 1-Wire and iButton Products
App Note Reading and Writing 1-Wire® Devices Through Serial Interfaces
App Note 1-Wire File Structure
App Note 1-Wire Communication Through Software
Tutorial Guidelines for Reliable Long Line 1-Wire Networks
App Note 1-Wire Software Resource Guide Device Description
App Note Printed Circuit Board Identification Using 1-Wire® Products
App Note 1-Wire Search Algorithm
App Note Using the DS2480B Serial 1-Wire® Line Driver
App Note White Paper 2: Using the 1-Wire® Public Domain Kit
App Note White Paper 5: Using 1-Wire APIs for Data Sheet Commands
App Note 1-Wire Communication with a Microchip PICmicro Microcontroller
App Note 1-Wire Master Device Configuration
App Note Minimal Remote 1-Wire® Master Protocol
Tutorial Serial Digital Data Networks
App Note Transition Guide: Replacing the DS2430A with the DS2431
App Note Package Thermal Resistance Values (Theta JA, Theta JC) for Temperature Sensors and 1-Wire Devices
App Note Add Control, Memory, Security, and Mixed-Signal Functions with a Single Contact
App Note Understanding Flip-Chip and Chip-Scale Package Technologies and Their Applications
App Note Attachment Methods for the Electro-Mechanical 1-Wire Contact Package
Reference Schematic Reference Design of a 1-Wire® Bidirectional Voltage-Level Translator for 1.8V to 5V
App Note Smart Cable Aids Quality Control and Authentication
Tutorial Improve Sensor Performance and SNR in Pulse Oximeter Designs
Tutorial Easily Add Memory, Security, Monitoring, and Control to Medical Sensors and Consumables
App Note Injection Molding an IC into a Connector or Consumable Item
App Note IEEE 1451.4 Class 1 MMI Smart Transducer Digital Driver Circuit
App Note Implementing Nonvolatile, Nonresettable Counters for Embedded Systems
Tutorial How to Build a 1-Wire® Evaluation Kit
App Note Understanding the DS1WM Synthesizable 1-Wire Bus Master
Reference Schematic Create a 1-Wire Master with Xilinx PicoBlaze
App Note Wirelessly Powering and Accessing a 1-Wire Network

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 Asset Tracking
Inventory
Medical Consumable ID
PCB ID and Authentication
Peripheral ID and Control
Print Cartridge Authentication
Rack Card ID
Security
Memory Type EEPROM
Memory Size 1K x 1
Bus Type 1-Wire
VSUPPLY (V) (min) 2.8
VSUPPLY (V) (max) 5.25
Package/Pins SFN/2
TDFN/6
TO92/3
TSOC/6
UCSP (R)/6
ULTRA THIN SFN/2
Budgetary
Price (See Notes) 		0.8
See parametric specs for Memory (EPROM, EEPROM, ROM, NV SRAM)

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

Applications/Uses

  • 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

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 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.

Simplified Block Diagram

DS2431: Typical Operating Circuit DS2431: Typical Operating Circuit Zoom icon

Technical Docs

Data Sheet 1024-Bit 1-Wire EEPROM May 14, 2021
App Note How to Level Shift 1-Wire Systems | Maxim Integrated
App Note Using 1-Wire for Flexible Electro-Mechanical Contact Applications
App Note Understanding and Using Cyclic Redundancy Checks with Maxim 1-Wire and iButton Products
App Note Reading and Writing 1-Wire® Devices Through Serial Interfaces
App Note 1-Wire File Structure
App Note 1-Wire Communication Through Software
Tutorial Guidelines for Reliable Long Line 1-Wire Networks
App Note 1-Wire Software Resource Guide Device Description
App Note Printed Circuit Board Identification Using 1-Wire® Products
App Note 1-Wire Search Algorithm
App Note Using the DS2480B Serial 1-Wire® Line Driver
App Note White Paper 2: Using the 1-Wire® Public Domain Kit
App Note White Paper 5: Using 1-Wire APIs for Data Sheet Commands
App Note 1-Wire Communication with a Microchip PICmicro Microcontroller
App Note 1-Wire Master Device Configuration
App Note Minimal Remote 1-Wire® Master Protocol
Tutorial Serial Digital Data Networks
App Note Transition Guide: Replacing the DS2430A with the DS2431
App Note Package Thermal Resistance Values (Theta JA, Theta JC) for Temperature Sensors and 1-Wire Devices
App Note Add Control, Memory, Security, and Mixed-Signal Functions with a Single Contact
App Note Understanding Flip-Chip and Chip-Scale Package Technologies and Their Applications
App Note Attachment Methods for the Electro-Mechanical 1-Wire Contact Package
Reference Schematic Reference Design of a 1-Wire® Bidirectional Voltage-Level Translator for 1.8V to 5V
App Note Smart Cable Aids Quality Control and Authentication
Tutorial Improve Sensor Performance and SNR in Pulse Oximeter Designs
Tutorial Easily Add Memory, Security, Monitoring, and Control to Medical Sensors and Consumables
App Note Injection Molding an IC into a Connector or Consumable Item
App Note IEEE 1451.4 Class 1 MMI Smart Transducer Digital Driver Circuit
App Note Implementing Nonvolatile, Nonresettable Counters for Embedded Systems
Tutorial How to Build a 1-Wire® Evaluation Kit
App Note Understanding the DS1WM Synthesizable 1-Wire Bus Master
Reference Schematic Create a 1-Wire Master with Xilinx PicoBlaze
App Note Wirelessly Powering and Accessing a 1-Wire Network

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 .