DS1809U-100+

Digital Potentiometers Overview

The DS1809U-100+ is a nonvolatile digitally controlled potentiometer (Dallastat) featuring 64 uniform wiper positions with linear taper. It operates on a single +4.5V to +5.5V supply and maintains position via internal EEPROM (>50k writes). The device uses a contact-closure interface (UC/DC inputs) for pushbutton or CPU control, eliminating external debounce circuitry. It offers autostore or command-initiated storage options. Available in an 8-lead µSOP package, it provides a low-cost alternative to mechanical solutions for industrial applications (-40°C to +85°C).

Digital Potentiometers Feature Summary

• 64-position linear taper digital potentiometer with 100kΩ resistance.
• Nonvolatile wiper storage using EEPROM with >50k write endurance.
• Contact-closure interface supporting repetitive and continuous pulse inputs without external debounce.
• Operates from +4.5V to +5.5V supplies with active current of 1mA typical.

Digital Potentiometers Applications

• Low-power portable or battery-powered equipment.
• Industrial temperature range applications requiring electronic adjustment.
• Replacement for mechanical potentiometers in cost-sensitive designs.

Digital Potentiometers Procurement Notes

Verify the specific package suffix 'U' corresponds to the 8-lead µSOP format as listed in the ordering information. Confirm RoHS compliance status indicated by the '+' suffix. Check availability for the tape and reel variant if required, as standard packaging may differ.

Digital Potentiometers Selection Notes

Select this component when a nonvolatile digital potentiometer with simple pushbutton control is needed. Ensure the supply voltage remains within the 4.5V to 5.5V range. Consider the 100kΩ end-to-end resistance and 64-tap resolution for linearity requirements. Verify that the contact-closure interface aligns with the system's control logic capabilities.

Digital Potentiometers Part Context

The DS1809 series belongs to Maxim Integrated's Dallastat family of nonvolatile digital potentiometers. The 'U' suffix denotes the 8-lead µSOP package, while 'Z' indicates SOIC and no suffix typically refers to PDIP. This specific part is the 100kΩ version of the U-package variant.

Digital Potentiometers Replacement Considerations

Direct pin-compatible replacements within the same family include DS1809U-010+ (10kΩ) and DS1809U-050+ (50kΩ). Other packages like SOIC (DS1809Z-100+) offer identical electrical characteristics but require footprint adaptation.