Maxim > Products > Digital Potentiometers > DS3904, DS3905

DS3904, DS3905

Triple, 128-Position, Nonvolatile, Variable, Digital Resistor/Switch

Triple, 128-Position, Nonvolatile, Variable, Digital Resistors/Switches Simplify Automated PC Power-Supply Trim
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Status Explanations for product status codes

Active: In Production.


The DS3904/DS3905 contain three nonvolatile (NV) low temperature coefficient, variable digital resistors. Each resistor has 128 user-selectable positions. Additionally, the DS3904/DS3905 have a high-impedance setting that allows each resistor to function as a digital switch. The DS3904/DS3905 can operate over a 2.7V to 5.5V supply voltage range, and communication with the device is achieved through a 2-wire serial interface. Address pins allow multiple DS3904/DS3905s to operate on the same two-wire bus. The DS3904 has one address pin, allowing two DS3904s to share the bus, while the DS3905 has three address pins, allowing up to eight DS3905s to share a common bus. The low-cost and small size of the DS3904/DS3905 make them ideal replacements for conventional mechanical trimming resistors.

Data Sheet

Download this datasheet in PDF formatDownload Rev 2 (PDF, 392kB)
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Key Features

  • Three 20kΩ, 128-Position Linear Digital Resistors
  • Resistor Settings are Stored in NV Memory
  • Each Resistor has a High-Impedance Setting for Switch Operation to Control Digital Logic
  • Low Temperature Coefficient
  • 2-Wire Serial Interface
  • 2.7V to 5.5V Operating Range
  • -40°C to +85°C Industrial Temperature
  • Packaging: 8-Pin µSOP for DS3904, 10-pin µSOP for DS3905


  • Cell Phones/PDAs
  • Fibre Optic Transceiver Modules
  • Portable Electronics
  • Power-Supply Calibration
  • Test Equipment

Key Specifications:

Digital Potentiometers
Part Number Taper POTs Control Interface Wiper Memory Steps REND-TO-END
Res. Tol.
Temp. Coeff.
typ max See Notes
DS3905  Linear 3 2-Wire Addressable Non-Volatile 128 20 25 125 200 $1.05 @1k
DS3904  $0.83 @1k
See All Digital Potentiometers (128)

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.


DS3904, DS3905: Typical Operating Circuit
Typical Operating Circuit

More Information

New Product Press Release   2003-02-24 ]

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Information Index

Rev 2; 2005-09-14
This page last modified: 2009-10-13