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DS2431
1024-Bit 1-Wire EEPROM

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


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Status
Part Number Status
DS2431 Active: In Production. But some versions of the family are No Longer Available. See Ordering Information.

Description
FULL DATA SHEET (PDF, 308kB)
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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.

An evaluation kit is available:  DS9090K  

Key Features   Applications/Uses
  • 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)

 
  • 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

    Key Specifications:  Memory (EPROM, EEPROM, ROM, NV SRAM)
    Part Number Memory Type Memory Size Bus Type Real Time Clock DIP w/Int. Batt. Pwr. Cap Pckg. Battery Monitor With GPIO VSUPPLY
    (V)
    VSUPPLY
    (V)
    Price
    min max See Notes
    DS2431  EEPROM 1K x 1 1-Wire No No No No No 2.8 5.25 $0.59 @1k
    See All Memory (EPROM, EEPROM, ROM, NV SRAM) (52)

    Diagram
    DS2431: Typical Operating Circuit
    Typical Operating Circuit

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    Document Ref.: 19-4675; 2009-11-02
    This page last modified: 2009-11-02


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