DS1809U-050+T&R

Digital Potentiometers Overview

The DS1809U-050+T&R is a nonvolatile digitally controlled potentiometer from the Dallastat family, manufactured by Analog Devices Inc./Maxim Integrated. It provides 64 uniform wiper positions with a linear taper and a nominal resistance of 50 kΩ. The device operates on a single +4.5V to +5.5V supply and features an electronic interface for digital or pushbutton control via UC and DC inputs. Wiper position data is retained in EEPROM without power, supporting over 50k write cycles. It is packaged in an 8-lead µSOP (µSOP-8) and rated for industrial temperatures from -40°C to +85°C.

Digital Potentiometers Feature Summary

• Nonvolatile memory retains wiper position using internal EEPROM upon power loss
• 64-position linear taper with standard 50 kΩ resistance value
• Pushbutton or contact closure interface requires no external debounce circuitry
• Operates within a narrow +4.5V to +5.5V supply range

Digital Potentiometers Applications

• Low-power portable equipment requiring manual adjustment
• Battery-powered systems needing nonvolatile calibration storage
• Industrial applications utilizing simple CPU-generated control signals

Digital Potentiometers Procurement Notes

Verify component authenticity through authorized channels due to discontinued status. Confirm package type matches the µSOP-8 footprint. Check RoHS compliance markings as indicated by the '+' suffix. Ensure supply voltage constraints (+4.5V to +5.5V) align with system design requirements before procurement.

Digital Potentiometers Selection Notes

Select this model for applications requiring exactly 64 resistance steps and nonvolatile storage. The 50 kΩ variant suits moderate impedance circuits. Verify that the operating voltage does not exceed 5.5V or drop below 4.5V. Consider the µSOP-8 package dimensions if space is limited compared to PDIP options.

Digital Potentiometers Part Context

This part belongs to the DS1809 Dallastat series, which includes 10 kΩ and 100 kΩ variants. The 'U' suffix denotes the µSOP-8 surface-mount package, while '+T&R' indicates lead-free/RoHS-compliant tape and reel packaging. It serves as a low-cost replacement for mechanical potentiometers in fixed-resistance adjustment scenarios.

Digital Potentiometers Replacement Considerations

Direct pin-compatible replacements include other DS1809 variants with different resistance values (DS1809U-010+, DS1809U-100+) or packages (PDIP, SO). Cross-family substitutes require verification of interface compatibility and voltage ranges.