Maxim
/
Products
/
Memory
/
DS2431
iButton and 1-Wire Memory DS2431
Top

DS2431

Download Data Sheet Download

1024-Bit 1-Wire EEPROM

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

Download Data Sheet Subscribe

Product Details

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.
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
See parametric specs for Memory (EPROM, EEPROM, ROM, NV SRAM)
Parametric specs for Memory (EPROM, EEPROM, ROM, NV SRAM)
Applications 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) 		$0.75 @1k
See parametric specs for Memory (EPROM, EEPROM, ROM, NV SRAM)
View More

Simplified Block Diagram

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

Technical Docs

Data Sheet 1024-Bit 1-Wire EEPROM Mar 31, 2015
App Note Wirelessly Powering and Accessing a 1-Wire Network
Reference Schematic Create a 1-Wire Master with Xilinx PicoBlaze
App Note Understanding the DS1WM Synthesizable 1-Wire Bus Master
Tutorial How to Build a 1-Wire® Evaluation Kit
App Note Implementing Nonvolatile, Nonresettable Counters for Embedded Systems
App Note IEEE 1451.4 Class 1 MMI Smart Transducer Digital Driver Circuit
App Note Injection Molding an IC into a Connector or Consumable Item
Tutorial Easily Add Memory, Security, Monitoring, and Control to Medical Sensors and Consumables
Tutorial Improve Sensor Performance and SNR in Pulse Oximeter Designs
App Note Smart Cable Aids Quality Control and Authentication
Reference Schematic Reference Design of a 1-Wire® Bidirectional Voltage-Level Translator for 1.8V to 5V
App Note Attachment Methods for the Electro-Mechanical 1-Wire Contact Package
App Note Understanding Flip-Chip and Chip-Scale Package Technologies and Their Applications
App Note Add Control, Memory, Security, and Mixed-Signal Functions with a Single Contact
App Note Package Thermal Resistance Values (Theta JA, Theta JC) for Temperature Sensors and 1-Wire Devices
App Note Transition Guide: Replacing the DS2430A with the DS2431
Tutorial Serial Digital Data Networks
App Note Minimal Remote 1-Wire® Master Protocol
App Note 1-Wire Master Device Configuration
App Note 1-Wire Communication with a Microchip PICmicro Microcontroller
App Note White Paper 5: Using 1-Wire APIs for Data Sheet Commands
App Note White Paper 2: Using the 1-Wire® Public Domain Kit
App Note Using the DS2480B Serial 1-Wire® Line Driver
App Note 1-Wire Search Algorithm
App Note Printed Circuit Board Identification Using 1-Wire® Products
App Note 1-Wire Software Resource Guide Device Description
Tutorial Guidelines for Reliable Long Line 1-Wire Networks
App Note 1-Wire Communication Through Software
App Note 1-Wire File Structure
App Note Reading and Writing 1-Wire® Devices Through Serial Interfaces
App Note Understanding and Using Cyclic Redundancy Checks with Maxim 1-Wire and iButton Products

Design & Development

Click any title below to view the detail page where available.

Additional Resources
Programming Options
Programming Secure Authenticators

Evaluation Board

DS9120

Description

The DS9120 family of socket boards are RJ11-to-socket boards that provide the hardware connectivity necessary to evaluate and operate 1-Wire® products in an easy-to-use PC environment. Additionally, the socket boards can be readily used with the DS9481R USB-to1-Wire adapter to create a 1-Wire PC programmer for 1-Wire EEPROM and one-time programmable (OTP)/EPROM devices.

View Details

Features

  • Fully Compliant with DS9481R USB-to-1-Wire Adapter
  • Convenient On-Board Test Points
  • Jumper Disconnect/Connect Functionality
  • Meets RJ11 1-Wire Interface Standard
  • Include Connections for Various OTP EPROM Programming

Evaluation Board

DS9120P

Description

The DS9120 family of socket boards are RJ11-to-socket boards that provide the hardware connectivity necessary to evaluate and operate 1-Wire® products in an easy-to-use PC environment. Additionally, the socket boards can be readily used with the DS9481R USB-to1-Wire adapter to create a 1-Wire PC programmer for 1-Wire EEPROM and one-time programmable (OTP)/EPROM devices.

View Details

Features

  • Fully Compliant with DS9481R USB-to-1-Wire Adapter
  • Convenient On-Board Test Points
  • Jumper Disconnect/Connect Functionality
  • Meets RJ11 1-Wire Interface Standard
  • Include Connections for Various OTP EPROM Programming

Evaluation Board

DS9120Q

Description

The DS9120 family of socket boards are RJ11-to-socket boards that provide the hardware connectivity necessary to evaluate and operate 1-Wire® products in an easy-to-use PC environment. Additionally, the socket boards can be readily used with the DS9481R USB-to1-Wire adapter to create a 1-Wire PC programmer for 1-Wire EEPROM and one-time programmable (OTP)/EPROM devices.

View Details

Features

  • Fully Compliant with DS9481R USB-to-1-Wire Adapter
  • Convenient On-Board Test Points
  • Jumper Disconnect/Connect Functionality
  • Meets RJ11 1-Wire Interface Standard
  • Include Connections for Various OTP EPROM Programming

Evaluation Board

DS9090EVKIT

$47.25

Description

The DS9090EVKIT evaluation system (EV system) consists of a DS9490+ USB-to-1-Wire®/iButton® adapter for PC connectivity, a DS9120P+ socket board with RJ11 cable, and seven different 1-Wire devices. This EV system provides the special hardware and software system to exercise the features of 1-Wire devices with memory or PIO/switches, except 1-Wire EPROM devices. (EPROM devices such as the DS2502 and DS2506 require a different adapter (DS9481R-3C7) to perform an EPROM write. This adapter can be purchased separately.) 1-Wire EPROM devices are available for sampling.

The EV system software consists of the OneWireViewer (a Java® program) that runs under Windows ® OS and comes as part of the 1-Wire drivers installation package.

View Details

Features

  • Easy Setup with USB Adapter
  • Fully Compliant with USB 2.0 Specification
  • Software Runs on Windows 8, Windows 7, WindowsVista®, and Windows XP® OS (32-Bit and 64-Bit Versions)
  • Convenient On-Board Test Points and Dual TO92 Socket
  • Standard RJ11 Connector Interfaces to DS9120 Socket Boards
  • Free Download of 1-Wire Drivers and OneWireViewer Demonstration Software
  • Compatible with Other 1-Wire Devices Purchased Separately

Reference Circuit

Create a 1-Wire Master with Xilinx PicoBlaze

Reference Circuit

Reference Design of a 1-Wire® Bidirectional Voltage-Level Translator for 1.8V to 5V
/en/design/design-tools/ee-sim.html?

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)
Applications 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) 		$0.75 @1k
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 Mar 31, 2015
App Note Wirelessly Powering and Accessing a 1-Wire Network
Reference Schematic Create a 1-Wire Master with Xilinx PicoBlaze
App Note Understanding the DS1WM Synthesizable 1-Wire Bus Master
Tutorial How to Build a 1-Wire® Evaluation Kit
App Note Implementing Nonvolatile, Nonresettable Counters for Embedded Systems
App Note IEEE 1451.4 Class 1 MMI Smart Transducer Digital Driver Circuit
App Note Injection Molding an IC into a Connector or Consumable Item
Tutorial Easily Add Memory, Security, Monitoring, and Control to Medical Sensors and Consumables
Tutorial Improve Sensor Performance and SNR in Pulse Oximeter Designs
App Note Smart Cable Aids Quality Control and Authentication
Reference Schematic Reference Design of a 1-Wire® Bidirectional Voltage-Level Translator for 1.8V to 5V
App Note Attachment Methods for the Electro-Mechanical 1-Wire Contact Package
App Note Understanding Flip-Chip and Chip-Scale Package Technologies and Their Applications
App Note Add Control, Memory, Security, and Mixed-Signal Functions with a Single Contact
App Note Package Thermal Resistance Values (Theta JA, Theta JC) for Temperature Sensors and 1-Wire Devices
App Note Transition Guide: Replacing the DS2430A with the DS2431
Tutorial Serial Digital Data Networks
App Note Minimal Remote 1-Wire® Master Protocol
App Note 1-Wire Master Device Configuration
App Note 1-Wire Communication with a Microchip PICmicro Microcontroller
App Note White Paper 5: Using 1-Wire APIs for Data Sheet Commands
App Note White Paper 2: Using the 1-Wire® Public Domain Kit
App Note Using the DS2480B Serial 1-Wire® Line Driver
App Note 1-Wire Search Algorithm
App Note Printed Circuit Board Identification Using 1-Wire® Products
App Note 1-Wire Software Resource Guide Device Description
Tutorial Guidelines for Reliable Long Line 1-Wire Networks
App Note 1-Wire Communication Through Software
App Note 1-Wire File Structure
App Note Reading and Writing 1-Wire® Devices Through Serial Interfaces
App Note Understanding and Using Cyclic Redundancy Checks with Maxim 1-Wire and iButton Products

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