WMS7140010M

Digital Potentiometers Overview

The WMS7140010M is a nonvolatile digital potentiometer manufactured by Winbond Electronics Corporation, distributed by Nuvoton Technology Corporation. It features a single channel with 16 taps and an end-to-end resistance of 10 kΩ. The device operates on a single supply voltage ranging from 2.7V to 5.5V and supports an industrial temperature range of -40°C to +85°C. It utilizes a 3-wire Up/Down serial interface for control and includes one non-volatile memory location (NVMEM0) for power-on recall of the wiper position. The 'M' suffix indicates an 8-pin MSOP package.

Digital Potentiometers Feature Summary

• Single-channel linear-taper digital potentiometer with 16 taps
• Non-volatile storage with automatic power-on recall
• 3-wire Up/Down serial interface (CS, INC, U/D)
• Industrial temperature range: -40°C to +85°C
• Supply voltage operation: 2.7V to 5.5V

Digital Potentiometers Applications

• Programmable gain amplifiers
• Voltage reference trimming
• RF amplifier control
• Audio volume control

Digital Potentiometers Procurement Notes

Verify that the component is sourced from authorized distributors to ensure authenticity. Confirm the specific package variant (MSOP) matches the design requirements. Check for any obsolescence notices or lifecycle status updates from the manufacturer, as the datasheet revision date is April 2005.

Digital Potentiometers Selection Notes

Select the WMS7140010M when a 10 kΩ resistance value is required. Choose this part over the WMS7141 series if an output buffer is not needed, as the WMS7140 lacks the internal buffer found in the WMS7141. Ensure the application fits within the 2.7V to 5.5V supply voltage range and the -40°C to +85°C operating temperature limits.

Digital Potentiometers Part Context

This component belongs to the WinPot family of nonvolatile digital potentiometers. The WMS714x series offers drop-in replacements for popular legacy parts. The WMS7140 variant specifically provides the resistive element without an output buffer, distinguishing it from the buffered WMS7141 counterpart.

Digital Potentiometers Replacement Considerations

Direct functional equivalents include other 10kΩ, 16-tap nonvolatile digital potentiometers with 3-wire interfaces. Verify pin compatibility and electrical specifications such as wiper resistance and bandwidth before substitution.

Digital Potentiometers FAQ

How is the wiper position controlled?

The wiper position is controlled via a 3-wire serial interface consisting of Chip Select (CS), Increment (INC), and Up/Down (U/D) pins.

What is the difference between WMS7140 and WMS7141?

The WMS7140 does not have an output buffer, while the WMS7141 includes an output buffer with a minimum drive capability of 3mA.

Does the device retain its setting after power loss?

Yes, the device has one non-volatile memory location (NVMEM0) that stores the wiper position, which is automatically loaded into the Tap Register upon power-up.