DS2431:1024-Bit 1-Wire EEPROM

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

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.

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
DS2431: Typical Operating Circuit
DS2431: Typical Operating Circuit
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
DataSheet
titleDownload file
DS2431 Data SheetDS2431.pdf
Parametrics
Part NumberApplicationsMemory TypeMemory SizeBus TypeVSUPPLY
(V)
VSUPPLY
(V)
Package/PinsBudgetary
Price
minmaxSee Notes
DS2431Asset Tracking
Inventory
Medical Consumable ID
PCB ID and Authentication
Peripheral ID and Control
Print Cartridge Authentication
Rack Card ID
Security
EEPROM1K x 11-Wire2.85.25SFN/2
TDFN-EP/6
TO92/3
TSOC/6
UCSP/6
$0.70 @1k
Design kits & evaluation modules
Quality and Environmental Data
Ordering Information
Part NumberStatusRecommended ReplacementPackageTempRoHS
DS2431No Longer AvailableDS2431+TO92,;3 pin;19.5 mm²-40°C to +85°CNo
DS2431+ActiveTO92,;3 pin;19.5 mm²-40°C to +85°CLead Free
DS2431+T&RActiveTO92,;3 pin;27.6 mm²-40°C to +85°CLead Free
DS2431/T&RNo Longer AvailableDS2431+T&RTO92,;3 pin;27.6 mm²-40°C to +85°CNo
DS2431G+T&RActiveSFN,;2 pin;37.2 mm²-40°C to +85°CLead Free
DS2431G+UActiveSFN,;2 pin;37.2 mm²-40°C to +85°CLead Free
DS2431GA+T&RActiveSFN,;2 pin;23.8 mm²-40°C to +85°CLead Free
DS2431GA+UActiveSFN,;2 pin;23.8 mm²-40°C to +85°CLead Free
DS2431GB+TActiveSFN,;2 pin;17.9 mm²-40°C to +85°CLead Free
DS2431GB+UActiveSFN,;2 pin;17.9 mm²-40°C to +85°CLead Free
Part NumberStatusRecommended ReplacementPackageTempRoHS
DS2431P+ActiveTSOC,;6 pin;17.8 mm²-40°C to +85°CLead Free
DS2431P+T&RActiveTSOC,;6 pin;17.8 mm²-40°C to +85°CLead Free
DS2431P/T&RNo Longer AvailableDS2431P+T&RTSOC,;6 pin;17.8 mm²-40°C to +85°CNo
DS2431Q+T&RActiveTDFN-EP,;6 pin;9.6 mm²-40°C to +85°CLead Free
DS2431Q+UActiveTDFN-EP,;6 pin;9.6 mm²-40°C to +85°CLead Free
DS2431XNo Longer AvailableDS2431X-S+UCSPR;-40°C to +85°CSee data sheet
DS2431X+No Longer AvailableDS2431X-S+UCSP,;6 pin;3 mm²-40°C to +85°CLead Free
DS2431X+UActiveUCSP,;6 pin;3 mm²-40°C to +85°CLead Free
DS2431X-S+ActiveUCSP,;6 pin;3 mm²-40°C to +85°CLead Free
DS2431.pdf DS2431
DS2431_cn.pdf DS2431
DS2431.pdf DS2431
DS2431.pdf DS2431
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White Paper 5: Using 1-Wire APIs for Data Sheet Commands DS1921K
White Paper 2: Using the 1-Wire® Public Domain Kit DS9097U-S09
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DS2431.pdf DS2431
DS2431_cn.pdf DS2431