DS1809U-100+T&R

Digital Potentiometers Overview

The DS1809U-100+T&R is a nonvolatile digitally controlled potentiometer (Dallastat) manufactured by Analog Devices Inc./Maxim Integrated. It provides 64 uniform wiper positions over the entire resistor range, including high-end and low-end terminals, with a standard resistance value of 100kΩ. The device operates from +4.5V to +5.5V supplies and features an electronic interface supporting either digital or pushbutton control via UC and DC inputs. Wiper position data is retained in EEPROM without power, utilizing autostore or command-initiated storage methods. It is packaged in an 8-lead µSOP for surface-mount applications.

Digital Potentiometers Feature Summary

• Nonvolatile memory retains wiper position using EEPROM cells rated for >50k writes
• 64-position linear taper potentiometer with 100kΩ total resistance
• Dual control interface supports pushbutton contact closure or CPU-generated signals
• Operates within +4.5V to +5.5V supply voltage range

Digital Potentiometers Applications

• Low-power portable electronics requiring mechanical potentiometer replacement
• Battery-powered systems needing nonvolatile adjustment capabilities
• Industrial temperature grade (-40°C to +85°C) calibration circuits

Digital Potentiometers Procurement Notes

Verify the specific package type matches the design requirements, as the DS1809 family includes PDIP, SO, and µSOP options. Confirm that the system power supply strictly adheres to the +4.5V to +5.5V operating range to ensure proper functionality. Ensure the STR pin configuration aligns with the intended wiper storage method, either autostore or command-initiated.

Digital Potentiometers Selection Notes

Select the DS1809U-100+T&R when a 100kΩ resistance value is required alongside nonvolatile storage capabilities. Consider the 64-position resolution for applications where fine analog adjustments are necessary but mechanical wear must be avoided. Verify that the 8-lead µSOP package footprint fits the PCB layout constraints compared to other available packages like PDIP or SO.

Digital Potentiometers Part Context

This component belongs to the DS1809 Dallastat series, which offers nonvolatile digitally controlled potentiometers. The 'U' suffix indicates the 8-lead µSOP surface-mount package, while '+T&R' denotes lead-free/RoHS compliance and tape-and-reel packaging. Other variants in the series include different resistance values (10kΩ, 50kΩ) and package types.

Digital Potentiometers Replacement Considerations

Direct replacements within the same family include DS1809U-010+T&R (10kΩ) and DS1809U-050+T&R (50kΩ), provided the resistance value difference is acceptable for the circuit design. Cross-package equivalents such as DS1809Z-100+ (SO package) may be used if the form factor can be adapted.