Dual Addressable Switch Plus 1Kb Memory

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The DS2406 Dual Addressable Switch Plus Memory offers a simple way to remotely control a pair of open drain transistors and to monitor the logic level at each transistor's output via the 1-Wire® bus for closed loop control. Each DS2406 has its own 64-bit ROM registration number that is factory lasered into the chip to provide a guaranteed unique identity for absolute traceability. The device's 1024 bits of EPROM can be used as electronic label to store information such as switch function, physical location, and installation date. Communication with the DS2406 follows the standard Dallas Semiconductor 1-Wire protocol and can be accomplished with minimal hardware such as a single port pin of a microcontroller. Multiple DS2406 devices can reside on a common 1-Wire network and be operated independently of each other. Individual devices will respond to a Conditional Search command if they qualify for certain user-specified conditions, which include the state of the output transistor, the static logic level or a voltage transition at the transistor's output.
DS2406: Block Diagram DS2406: Block Diagram Enlarge+

Key Features

  • Open drain PIO pins are controlled and their logic level can be determined over 1-Wire bus for closed-loop control
  • Replaces and is fully compatible with DS2407 but no user-programmable power-on settings and no Hidden Mode
  • PIO channel A sink capability of 50mA at 0.4V with soft turn-on; channel B 8mA at 0.4V
  • Maximum operating voltage of 13V at PIO-A, 6.5V at PIO-B
  • 1024 bits user-programmable OTP EPROM
  • User-programmable status memory to control the device
  • Multiple DS2406's can be identified on a common 1-Wire bus and be turned on or off independently of other devices on the bus
  • Unique, factory-lasered and tested 64-bit registration number (8-bit family code + 48-bit serial number + 8-bit CRC tester) assures error-free selection and absolute identity because no two parts are alike
  • On-chip CRC16 generator allows detection of data transfer errors
  • Built-in multidrop controller ensures compatibility with other 1-Wire net products
  • Reduces control, address, data, programming and power to a single data pin
  • Directly connects to a single port pin of a microprocessor and communicates at up to 16.3 kbits/s
  • Supports Conditional Search with user-selectable condition
  • VCC bondout for optional external supply to the device (TSOC package only)
  • 1-Wire communication operates over a wide voltage range of 2.8V to 6.0V from -40°C to +85°C
  • Low cost TO-92, 6-pin TSOC and Flip Chip surface mount package


  • HVAC Systems
  • IEEE 1451.4 Sensor TEDS
  • Process Control
  • System Configuration & Monitoring
Part NumberApplicationsMemory TypeMemory SizeBus TypeVSUPPLY
minmaxSee Notes
DS2406 Peripheral ID and ControlEPROM1024bit x11-Wire2.86
$2.16 @1k
See All Memory (EPROM, EEPROM, ROM, NV SRAM) (47)
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.

DS9090EVKIT: 1-Wire Device Evaluation Kit

Technical Documents

App Note 6755 Wirelessly Powering and Accessing a 1-Wire Network
App Note 5856 DS2406 PIO Command Examples
Reference Schematic 5508 Create a 1-Wire Master with Xilinx PicoBlaze
App Note 5507 Understanding the DS1WM Synthesizable 1-Wire Bus Master
Tutorial 5403 How to Build a 1-Wire® Evaluation Kit
Tutorial 5026 Protecting 5V 1-Wire® Slaves from Overvoltage Exposure
App Note 4930 Easy Modifications to Sustain a Design with the DS2409 MicroLAN™ Coupler
App Note 3989 Add Control, Memory, Security, and Mixed-Signal Functions with a Single Contact
App Note 3377 Maxim Wafer-Level Package Assembly Guide
App Note 2965 1-Wire Master Device Configuration
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
Reference Schematic 244 Advanced 1-Wire Network Driver
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 158 1-Wire® Tagging with XML
App Note 155 1-Wire Software Resource Guide Device Description
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: DS2406.pdf 
Lead-Free Package Tin (Sn) Whisker Reports

Additional Resources

1-Wire Tutorial

CAD Symbols and Footprints

  • DS2406+
  • DS2406+T&R
  • DS2406P+
  • DS2406P+T&R
  • Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C  

    Note : The failure rates are summarized by technology and mapped to the associated material part numbers. The failure rates are highly dependent on the number of units tested.

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