DS3903 Datasheet – Triple Digital Potentiometer – Maxim

Part Number : DS3903, DS3903E-020

Function : Triple 128-Position Nonvolatile Digital Potentiometer

Package : 20-Pin TSSOP type

Manufacturers : Maxim Integrated

Image :

Description :

The DS3903 contains three nonvolatile (NV) low temperature coefficient digital potentiometers, which can be accessed through a 2-wire bus. The DS3903 operates in both 3V and 5V systems, and it features a write-protect pin that can lock the positions of the potentiometers. An address pin allows two DS3903s to be placed on the same 2-wire bus.



  • Three 128-Position Linear Potentiometers (Two 10kΩ, One 100kΩ)
  • NV Wiper Storage
  • Low End-to-End Temperature Coefficient
  • Operates on an Industry-Standard 2-Wire Bus
  • Write-Protect Pin
  • Supply Range: 3V or 5V
  • Operating Temperature Range: -40°C to +85°C



  • A Small and Low-Cost Replacement for Mechanical Potentiometers
  • Fiber Optic Transceiver Modules
  • Mobile Phones and PDAs
  • Portable Electronics
  • Power Supply Calibration



DS3903 PDF Datasheet Download

DS1804 Datasheet PDF – Digital Potentiometer

Part Number : DS1804

Function : Nonvolatile Trimmer Potentiometer

Manufacturers : Dallas Semiconductor -> Maxim Integrated

Pinouts :

DS1804 Pinout


The DS1804 NV trimmer potentiometer is a nonvolatile digital potentiometer that has 100 positions. The
device provides an ideal method for low-cost trimming applications using a CPU or manual control input
with minimal external circuitry. Wiper position of the DS1804 can be stored in EEPROM memory on
demand. The device’s wiper position is manipulated by a three-terminal port that provides an increment/
decrement counter controlled interface. This port consists of the control inputs CS, INC, and U/D. The
DS1804 is available in three resistor grades, which include a 10kΩ, 50kΩ, and 100kΩ. The device is
provided in an industrial temperature grade. Additionally, the DS1804 will operate from 3V or 5V
supplies and is ideal for portable application requirements. Three packaging options are available and
include the 8-pin (300 mils) DIP, 8-pin (150 mils) SO, and 8-pin (118 mils) μSOP.

The DS1804 is a single nonvolatile potentiometer. The device has a total of 100 tap-points including the
L- and H- terminals. A total of 99 resistive segments exist between the L- and H- terminals. These tap
points are accessible to the W-terminal, whose position is controlled via a three-terminal control port.

1. Single 100-Position Taper Potentiometer
2. Nonvolatile (NV) On-Demand Wiper Storage
3. Operates from 3V or 5V Supplies
4. Up/Down, Increment-Controlled Interface
5. Available in 8-Pin (300 mils) DIP, 8-Pin (150 mils) SO, and 8-Pin (118 mils) µSOP
6. -40°C to +85°C Operating Temperature Range

DS1804 Datasheet

DS1804 Datasheet PDF Download
DS1804 pdf