DS2431-A1:1024-Bit, 1-Wire EEPROM for Automotive Applications

The DS2431-A1 is an AEC-Q100 Grade 1 qualified version of the DS2431. The logical behavior of both versions is identical. The DS2431-A1 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-A1 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
  • 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, Typ)
  • Reads and Writes Over a 4.5V to 5.25V Voltage Range from -40°C to +125°C
  • Communicates to Host with a Single Digital Signal at 15.4kbps Using 1-Wire Protocol
  • Meets AEC-Q100 Grade 1 Qualification Requirements
  • Also Available as Standard Version for Industrial Temperature Range (DS2431)
  • Accessory/PCB Identification
  • Automotive Cable Assembly Identification
  • Automotive Sensor Identification and Calibration Data Storage
titleDownload file
DS2431-A1 Data SheetDS2431-A1.pdf
Part NumberMemory TypeMemory SizeBus TypeVSUPPLY
maxSee Notes
DS2431-A1EEPROM1K x 11-Wire5.25TSOC/6$1.56 @1k
Related Products
  • DS2431:1024-Bit 1-Wire EEPROM
Ordering Information
Part NumberStatusRecommended ReplacementPackageTempRoHS
DS2431P-A1+ActiveNATSOC,;6 pin;17.8 mm²-40°C to +125°CLead Free
DS2431P-A1+TActiveNATSOC,;6 pin;17.8 mm²-40°C to +125°CLead Free
DS2431-A1.pdf DS2431-A1
Understanding the DS1WM Synthesizable 1-Wire Bus Master DS1923