DS2401:Silicon Serial Number

The DS2401 enhanced Silicon Serial Number is a low-cost, electronic registration number that provides an absolutely unique identity which can be determined with a minimal electronic interface (typically, a single port pin of a microcontroller). The DS2401 consists of a factory-lasered, 64-bit ROM that includes a unique 48-bit serial number, an 8-bit CRC, and an 8-bit Family Code (01h). Data is transferred serially via the 1-Wire® protocol that requires only a single data lead and a ground return. Power for reading and writing the device is derived from the data line itself with no need for an external power source. The DS2401 is an upgrade to the DS2400. The DS2401 is fully reverse-compatible with the DS2400 but provides the additional multi-drop capability that enables many devices to reside on a single data line. The familiar TO-92, SOT-223 or TSOC package provides a compact enclosure that allows standard assembly equipment to handle the device easily.

Key Features
  • Guaranteed Unique 64-Bit ROM ID Chip for Absolute Traceability
    • Unique, Factory-Lasered and Tested 64-Bit Registration Number (8-Bit Family Code +48-Bit Serial Number + 8-Bit CRC Tester)
    • 8-Bit Family Code Specifies DS2401 Communications Requirements to Reader
  • Minimalist 1-Wire® Interface Lowers Cost and Interface Complexity
    • Multiple DS2401 Devices Can Reside on a Common 1-Wire Net
    • Built-In Multidrop Controller Ensures Compatibility with Other 1-Wire Net Products
    • Reduces Control, Address, Data, and Power to a Single Pin and Communicates at Up to 16.3kbps
    • Presence Pulse Acknowledges When the Reader First Applies Voltage
    • Low-Cost TO-92, SOT-223, and TSOC Surface-Mount Packages
    • TO-92 Tape-and-Reel Version with Leads Bent to 100-mil Spacing (Default) or with Straight Leads (DS2401-SL)
  • Wide Voltage and Temperature Operating Ranges Enables Robust System Performance
    • Extended 2.8V to 6.0V Range
    • Zero Standby Power Required
    • -40°C to +85°C Industrial Temperature Range
DS2401: Pin Assignment
DS2401: Pin Assignment
  • Equipment Registration
  • Network-Node Identification
  • PCB Identification
  • Reference Design License Management
titleDownload file
DS2401 Data SheetDS2401.pdf
Part NumberApplicationsMemory TypeMemory SizeBus TypeVSUPPLY
minmaxSee Notes
DS2401Medical Consumable ID
PCB ID and Authentication
Peripheral ID and Control
Print Cartridge Authentication
ROM64bit x 11-Wire2.86SOT-223/3
$0.76 @1k
Design kits & evaluation modules
Quality and Environmental Data
Ordering Information
Part NumberStatusRecommended ReplacementPackageTempRoHS
DS2401No Longer AvailableDS2401+TO92,;3 pin;19.5 mm²-40°C to +85°CNo
DS2401+ActiveTO92,;3 pin;19.5 mm²-40°C to +85°CLead Free
DS2401+T&RActiveTO92,;3 pin;27.6 mm²-40°C to +85°CLead Free
DS2401-SL+T&RActiveTO92,;3 pin;19.5 mm²-40°C to +85°CLead Free
DS2401/T&RNo Longer AvailableDS2401+T&RTO92,;3 pin;27.6 mm²-40°C to +85°CNo
DS2401/T&R/SLNo Longer AvailableTO92,;3 pin;19.5 mm²-40°C to +85°CNo
DS2401P+ActiveTSOC,;6 pin;17.8 mm²-40°C to +85°CLead Free
DS2401P+T&RActiveTSOC,;6 pin;17.8 mm²-40°C to +85°CLead Free
DS2401X+UActiveWLP,;4 pin;THIN W;-40°C to +85°CLead Free
DS2401X-S+TActiveWLP,;4 pin;THIN W;-40°C to +85°CLead Free
Part NumberStatusRecommended ReplacementPackageTempRoHS
DS2401Z+ActiveSOT-223,;3 pin;48.9 mm²-40°C to +85°CLead Free
DS2401Z+T&RActiveSOT-223,;3 pin;48.9 mm²-40°C to +85°CLead Free
DS2401.pdf DS2401
DS2401_cn.pdf DS2401
DS2401.pdf DS2401
DS2401.pdf DS2401
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Understanding the DS1WM Synthesizable 1-Wire Bus Master DS1923
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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
Using a UART to Implement a 1-Wire Bus Master DS1990A
Reading and Writing 1-Wire® Devices Through Serial Interfaces DS1923
DS2401.pdf DS2401
DS2401_cn.pdf DS2401