Dual, NV, Variable Resistors with User EEPROM

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The DS3902 features a dual, nonvolatile (NV), low temperature-coefficient, variable digital resistor with 256 user-selectable positions. The DS3902 can operate over a wide supply range of 2.4V to 5.5V, and communication with the device is achieved through an I²C compatible serial interface. Internal address settings allow the DS3902 slave address to be programmed to one of 128 possible addresses. The low cost and the small size of the DS3902 make it an ideal replacement for conventional mechanical-trimming resistors.
DS3902: Typical Operating Circuit DS3902: Typical Operating Circuit Enlarge+

Key Features

  • Dual 256-Position Linear Digital Resistors
  • Available as 50kΩ/30kΩ or 50kΩ/15kΩ
  • Resistor Settings Stored in NV Memory
  • Low Temperature Coefficient
  • I²C-Compatible Serial Interface
  • Wide Operating Voltage (2.4V to 5.5V)
  • Software Write Protection
  • User-EEPROM Memory
  • Programmable Slave Address
  • Operating Temperature Range: -40°C to +95°C
  • Small 8-Pin µSOP Package


  • Audio Power-Amp Biasing
  • Instrumentation and Industrial Controls
  • Optical Transceivers
  • Optical Transponders
  • Replacement for Mechanical Variable Resistors and Dip Switches
  • RF Power Amps

See parametric specs for Digital Potentiometers (118)

Part NumberTaperPOTsControl InterfaceWiper MemoryStepsREND-TO-END
Res. Tol.
Temp. Coeff.
Wiper Resistance
typtypmaxSee Notes
DS3902 Linear22-Wire AddressableNon-Volatile25650 + (30 or 15)20300160200
$0.99 @1k

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.
Product Reliability Reports: DS3902.pdf 
Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C   Material Composition  

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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