DS1869-10

Digital Potentiometers Overview

The DS1869-10 is a digital rheostat or potentiometer from the Dallastat series, featuring a 10 kΩ resistance and 64 uniform tap points. It operates on a differential supply voltage ranging from 2.7V to 8.0V with an idle current of 2µA at 3.3V. The device maintains wiper position via nonvolatile EEPROM memory, supporting over 50,000 write cycles. It accepts control inputs through single/dual pushbuttons or a digital source interface, utilizing internal pull-ups and debouncing. The component is available in 8-pin DIP and SOIC packages and functions within an industrial temperature range of -40°C to +85°C.

Digital Potentiometers Feature Summary

• Nonvolatile wiper position storage using EEPROM technology
• Configurable for single pushbutton, dual pushbutton, or digital serial control
• Internal 100kΩ pull-ups and hardware debouncing for contact inputs
• Operates on 3V or 5V supplies with a maximum differential voltage of 8V

Digital Potentiometers Applications

• Volume and tone control in audio equipment
• Contrast and brightness adjustment in displays
• Dimmer control systems
• Replacing mechanical variable resistors in electronic interfaces

Digital Potentiometers Procurement Notes

Verify package availability as the DS1869 series includes both 8-pin DIP and 8-pin SOIC options. Confirm that the specific application requires the 10 kΩ resistance value associated with this model suffix. Check for end-of-life status or obsolescence notices, as older Maxim Integrated components may have limited long-term supply chains.

Digital Potentiometers Selection Notes

Select the DS1869-10 when a 10 kΩ total resistance is required. Ensure the control interface matches the design: use the D pin for microprocessor control or UC/DC pins for manual pushbutton operation. Verify that the system power supply stays within the 2.7V to 8.0V differential range. Consider the 400Ω typical wiper resistance if low-current signal paths are involved.

Digital Potentiometers Part Context

The DS1869 belongs to the Dallastat family of digital potentiometers designed to replace mechanical controls. The '-10' suffix specifically denotes the 10 kΩ standard resistance value, distinguishing it from the 50 kΩ (-50) and 100 kΩ (-100) variants. This component integrates the resistive element, control logic, and nonvolatile memory into a single IC.

Digital Potentiometers Replacement Considerations

Direct replacements include other models within the DS1869 series (DS1869-50, DS1869-100) if resistance values differ. Cross-reference with other 64-tap digital potentiometers from Analog Devices or Maxim Integrated that support similar supply voltages and package types.

Digital Potentiometers FAQ

How does the DS1869 handle wiper position during power loss?

The device uses an internal EEPROM memory cell array to maintain the last recorded wiper position. Upon power-up, the wiper automatically returns to this stored setting.

What is the minimum pulse width required for input recognition?

For contact closure inputs (UC, DC), the pulse width must be greater than 1 ms. For the digital source input (D), the minimum pulse width is specified in microseconds, but repetitive pulses must be separated by at least 1 ms to be recognized individually.

Can the DS1869 operate with a single pushbutton?

Yes, by connecting the DC input to VCC and allowing the UC input to float or connect to a button, the device enters single pushbutton mode, toggling direction based on previous activity or inactivity periods.