Triple, 8-Bit NV Variable Resistor with Dual Settings and User EEPROM

Low Cost, Small Size, and a Rich Feature Set, Ideal Replacement for Conventional Mechanical-Trimming Resistors, Specifically in Module Applications

Please check latest availability status for a specific part variant.


The DS3901 is a triple, 8-bit nonvolatile (NV) variable resistor. Each of the resistors has two setting registers, which are selectable by software or by pin configuration. The selected register determines the value of the variable resistor. Additionally, all three resistors have a high-impedance setting. Resistor R0 has the additional flexibility of allowing an external shunt resistor to provide increased dynamic range. Internal address settings allow the DS3901 slave address to be programmed to one of 128 possible addresses. The DS3901 also features an optional password-protection scheme that allows the protection of sensitive data.
DS3901: Typical Operating Circuit DS3901: Typical Operating Circuit Enlarge+

Key Features

  • Three 256-Position Linear Digital Resistors
  • Full-Scale Resistances 50kΩ, 30kΩ, 20kΩ
  • Dual NV Settings for Each Resistor
  • Low Temperature-Coefficient Resistors
  • I²C Serial Interface
  • Wide Operating Voltage (2.4V to 5.5V)
  • Two-Level Password Write Protection
  • 232 Bytes of User EEPROM
  • Programmable Slave Address
  • -40°C to +95°C Operating Temperature Range

See parametric specs for Digital Potentiometers (118)

Part NumberTaperPOTsControl InterfaceWiper MemoryStepsREND-TO-END
Res. Tol.
Temp. Coeff.
Wiper Resistance
typtypmaxSee Notes
DS3901 Linear3I2CNon-Volatile256
$1.09 @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: DS3901.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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