DS2431

1024-Bit 1-Wire EEPROM

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


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.
DS2431: Typical Operating Circuit DS2431: Typical Operating Circuit Enlarge+

Key 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

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
Part Number Memory Type Memory Size Bus Type Real Time Clock DIP w/Int. Batt. Pwr. Cap Pckg. Battery Monitor GPIO VSUPPLY
(V)
VSUPPLY
(V)
Budgetary
Price
min max See Notes
DS2431  EEPROM 1K x 1 1-Wire No No No No No 2.8 5.25 $0.70 @1k
See All Memory (EPROM, EEPROM, ROM, NV SRAM) (68)
Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.


DS9120: Socket Boards for Evaluating 1-Wire Devices
DS9120P: Socket Boards for Evaluating 1-Wire Devices
DS9120Q: Socket Boards for Evaluating 1-Wire Devices

Technical Documents

Reference Schematic 5508 Create a 1-Wire Master with Xilinx PicoBlaze
App Note 5507 Understanding the DS1WM Synthesizable 1-Wire Bus Master
App Note 5403 How to Build a 1-Wire® Evaluation Kit
App Note 5042 Implementing Nonvolatile, Nonresettable Counters for Embedded Systems
App Note 4931 IEEE 1451.4 Class 1 MMI Smart Transducer Digital Driver Circuit
App Note 4717 Injection Molding an IC into a Connector or Consumable Item
Tutorial 4702 Easily Add Memory, Security, Monitoring, and Control to Medical Sensors and Consumables
Tutorial 4671 Improve Sensor Performance and SNR in Pulse Oximeter Designs
App Note 4623 Smart Cable Aids Quality Control and Authentication
Reference Schematic 4477 Reference Design of a 1-Wire® Bidirectional Voltage-Level Translator for 1.8V to 5V
App Note 4255 How to Power the Extended Features of 1-Wire® Devices
App Note 4132 Attachment Methods for the Electro-Mechanical SFN Package
App Note 4002 Understanding Flip-Chip and Chip-Scale Package Technologies and Their Applications
App Note 3989 Add Control, Memory, Security, and Mixed-Signal Functions with a Single Contact
App Note 3930 Package Thermal Resistance Values (Theta JA, Theta JC) for Temperature Sensors and 1-Wire Devices
App Note 3697 Transition Guide: Replacing the DS2430A with the DS2431
Tutorial 3438 Serial Digital Data Networks
App Note 2966 Minimal Remote 1-Wire® Master Protocol
App Note 2965 1-Wire Master Device Configuration
App Note 2420 1-Wire Communication with a Microchip PICmicro Microcontroller
App Note 1100 White Paper 5: Using 1-Wire APIs for Data Sheet Commands
App Note 1097 White Paper 2: Using the 1-Wire® Public Domain Kit
App Note 192 Using the DS2480B Serial 1-Wire® Line Driver
App Note 187 1-Wire Search Algorithm
App Note 178 Printed Circuit Board Identification Using 1-Wire® Products
App Note 155 1-Wire Software Resource Guide Device Description
Tutorial 148 Guidelines for Reliable Long Line 1-Wire Networks
App Note 126 1-Wire Communication Through Software
App Note 114 1-Wire File Structure
App Note 74 Reading and Writing 1-Wire® Devices Through Serial Interfaces
App Note 27 Understanding and Using Cyclic Redundancy Checks with Maxim 1-Wire and iButton Products

Quality and Environmental Data

Product Reliability Reports: DS2431.pdf 
Lead-Free Package Tin (Sn) Whisker Reports
 

Related Resources


DS28E80
Gamma Radiation Resistant 1-Wire Memory

  • High Gamma Resistance Allows User-Programmable Manufacturing or Calibration Data Before Medical Sterilization
  • Lower Block Size Provides Greater Flexibility in Programming User Memory
  • Advanced 1-Wire Protocol Minimizes Interface to Just Single Contact

MAX66242
DeepCover Secure Authenticator with ISO 15693, I²C, SHA-256, and 4Kb User EEPROM

  • Complete Counterfeit/Cloning/IP Protection Engine
  • Flexible Connection and Communication Capabilities Support a Wide Range of Applications
  • Enables Robust Design

Type ID PDF Title
Reference Schematic 5508 Create a 1-Wire Master with Xilinx PicoBlaze
App Note 5507 Understanding the DS1WM Synthesizable 1-Wire Bus Master
App Note 5403 How to Build a 1-Wire® Evaluation Kit
App Note 5042 Implementing Nonvolatile, Nonresettable Counters for Embedded Systems
App Note 4931 IEEE 1451.4 Class 1 MMI Smart Transducer Digital Driver Circuit
App Note 4717 Injection Molding an IC into a Connector or Consumable Item
Tutorial 4702 Easily Add Memory, Security, Monitoring, and Control to Medical Sensors and Consumables
Tutorial 4671 Improve Sensor Performance and SNR in Pulse Oximeter Designs
App Note 4623 Smart Cable Aids Quality Control and Authentication
Reference Schematic 4477 Reference Design of a 1-Wire® Bidirectional Voltage-Level Translator for 1.8V to 5V
App Note 4255 How to Power the Extended Features of 1-Wire® Devices
App Note 4132 Attachment Methods for the Electro-Mechanical SFN Package
App Note 4002 Understanding Flip-Chip and Chip-Scale Package Technologies and Their Applications
App Note 3989 Add Control, Memory, Security, and Mixed-Signal Functions with a Single Contact
App Note 3930 Package Thermal Resistance Values (Theta JA, Theta JC) for Temperature Sensors and 1-Wire Devices
App Note 3697 Transition Guide: Replacing the DS2430A with the DS2431
Tutorial 3438 Serial Digital Data Networks
App Note 2966 Minimal Remote 1-Wire® Master Protocol
App Note 2965 1-Wire Master Device Configuration
App Note 2420 1-Wire Communication with a Microchip PICmicro Microcontroller
App Note 1100 White Paper 5: Using 1-Wire APIs for Data Sheet Commands
App Note 1097 White Paper 2: Using the 1-Wire® Public Domain Kit
App Note 192 Using the DS2480B Serial 1-Wire® Line Driver
App Note 187 1-Wire Search Algorithm
App Note 178 Printed Circuit Board Identification Using 1-Wire® Products
App Note 155 1-Wire Software Resource Guide Device Description
Tutorial 148 Guidelines for Reliable Long Line 1-Wire Networks
App Note 126 1-Wire Communication Through Software
App Note 114 1-Wire File Structure
App Note 74 Reading and Writing 1-Wire® Devices Through Serial Interfaces
App Note 27 Understanding and Using Cyclic Redundancy Checks with Maxim 1-Wire and iButton Products