WMS7171100S

Digital Potentiometers Overview

The WMS7171100S is a single-channel non-volatile digital potentiometer featuring an integrated output buffer. It provides 100 taps with a nominal end-to-end resistance of 100 kΩ and operates on a single supply voltage ranging from 2.7V to 5.5V. The device utilizes a 3-wire Up/Down serial interface (CS, INC, U/D) for wiper control and automatically recalls the stored position from non-volatile memory upon power-up. Designed for industrial applications between -40°C and +85°C, it is housed in an 8-pin SOIC package.

Digital Potentiometers Feature Summary

• Single linear-taper channel with 100 taps and 100 kΩ end-to-end resistance
• Built-in output buffer enabling three-terminal voltage divider configuration only
• Non-volatile memory (NVMEM0) for automatic wiper position recall at power-up
• 3-wire Up/Down serial interface for control and data storage

Digital Potentiometers Applications

• Programmable non-inverting gain amplifiers
• Voltage reference trimming circuits
• RF amplifier control systems

Digital Potentiometers Procurement Notes

Verify the component manufacturer origin, as documentation references Winbond Electronics Corporation while the brand is specified as Nuvoton Technology Corporation. Confirm that the 8-pin SOIC package matches the 'S' suffix designation in the ordering information table. Ensure the specific revision level aligns with project requirements given the preliminary datasheet status.

Digital Potentiometers Selection Notes

Select the WMS7171100S when an output buffer is required for the wiper signal, distinguishing it from the unbuffered WMS7170 series. This model supports only three-terminal voltage divider configurations due to the internal buffer. Verify that the 100 kΩ resistance value fits the circuit impedance constraints and that the 3-wire interface logic levels are compatible with the controlling microcontroller.

Digital Potentiometers Part Context

This component belongs to the WMS717x family of non-volatile digital potentiometers manufactured by Winbond Electronics Corporation. The family includes variants with different resistances (10k, 50k, 100k), tap counts (100 taps), and buffer options (WMS7170 vs. WMS7171). The WMS7171100S specifically denotes the 100kΩ version with a buffer in an SOIC package.

Digital Potentiometers Replacement Considerations

The WMS7170100S serves as a direct substitute if the output buffer is not needed and a two-terminal rheostat or unbuffered divider configuration is acceptable. Other family members like WMS7171050S or WMS7171010S offer lower resistance values but share the same pinout and functionality.