MCP41100T-I/SN

Digital Potentiometers Overview

The MCP41100T-I/SN is a single-channel, 8-bit volatile digital potentiometer manufactured by Microchip Technology. It features a nominal resistance of 100 kΩ with 256 discrete taps and operates on a single supply voltage ranging from 2.7V to 5.5V. The device utilizes an industry-standard SPI serial interface for wiper position control. Key electrical specifications include a maximum static supply current of 1 µA, ±1 LSB maximum Integral and Differential Non-Linearity (INL & DNL), and a temperature coefficient of 800 ppm/°C. It is available in an 8-lead SOIC package.

Digital Potentiometers Feature Summary

• Single-channel digital potentiometer with 100 kΩ nominal resistance and 256 linear tap positions
• SPI serial interface supporting Mode 0,0 and Mode 1,1 configurations
• Low power CMOS technology with <1 µA maximum static supply current
• Software shutdown feature that opens the A terminal and connects the wiper to the B terminal

Digital Potentiometers Applications

• Audio equipment volume and tone control
• Stereo audio balance adjustment
• Programmable gain amplifiers and offset adjustments
• Liquid Crystal Display (LCD) contrast control
• Servo motor speed and position control

Digital Potentiometers Procurement Notes

Verify the 'I' suffix indicates the Industrial temperature range (-40°C to +85°C) and the 'SN' suffix denotes the 8-lead SOIC surface-mount package. Confirm the 'T' prefix specifies tape-and-reel packaging rather than tube. Ensure the source documentation explicitly lists the 100 kΩ variant, as this family includes 10 kΩ and 50 kΩ options.

Digital Potentiometers Selection Notes

Select this component when a single-channel, non-volatile memory-free digital resistor is required. The 100 kΩ value suits high-impedance signal paths or low-current applications. Verify that the system requires volatile storage, as the wiper position resets to mid-scale (80h) upon power-up. Ensure the host controller supports the specific SPI clock frequency requirements up to 10 MHz.

Digital Potentiometers Part Context

This part belongs to the MCP41XXX series of single-channel digital potentiometers. It shares the same pinout and core architecture as the MCP41010 (10 kΩ) and MCP41050 (50 kΩ). Unlike the dual-channel MCP42XXX devices, it lacks dedicated Reset (RS) and Shutdown (SHDN) pins, relying solely on software commands for these functions.

Digital Potentiometers Replacement Considerations

Direct functional substitutes within the same package include the MCP41010T-I/SN and MCP41050T-I/SN, provided the resistance value difference is acceptable for the circuit design. Cross-family replacements require verification of pin compatibility and interface protocols.