MCP4341T-104E/ST

Digital Potentiometers Overview

The MCP4341T-104E/ST is a quad-channel digital potentiometer IC featuring non-volatile memory and WiperLock technology. It provides four independent resistor networks with a nominal resistance of 100 kΩ (indicated by the '104' suffix) and 7-bit resolution, offering 129 taps per channel. The device operates on a supply voltage range of 2.7V to 5.5V and communicates via a high-speed SPI serial interface supporting up to 10 MHz. Key electrical characteristics include a typical wiper resistance of 75 Ω, low temperature coefficients, and high-voltage tolerant digital inputs up to 12.5V.

Digital Potentiometers Feature Summary

• Quad Resistor Network: Four independent potentiometers or rheostats with 100 kΩ nominal resistance and 7-bit (129 tap) resolution.
• Non-Volatile Memory: Includes EEPROM for wiper settings and data storage, utilizing WiperLock™ technology to automatically recall saved positions upon power-up.
• SPI Interface: Supports standard SPI modes 0,0 and 1,1 with clock frequencies up to 10 MHz for high-speed read/write operations.
• High-Voltage Inputs: Digital input pins (CS, SCK, SDI, WP, RESET) tolerate voltages up to 12.5V, facilitating split-rail applications.

Digital Potentiometers Applications

• Audio volume control and tone adjustment in multi-channel systems
• Programmable gain amplifiers and variable bias circuits
• Instrumentation requiring precise analog signal attenuation
• Industrial control systems needing persistent calibration settings

Digital Potentiometers Procurement Notes

Verify the package marking and datasheet revision against Microchip official documentation to confirm authenticity. Ensure the ordering suffix matches the required tape-and-reel packaging format. Cross-reference the specific resistance value ('104' for 100 kΩ) and resolution ('7-bit') with system design requirements before procurement.

Digital Potentiometers Selection Notes

Select this component when four independent digital potentiometers are required with persistent memory settings. The 100 kΩ resistance value suits moderate impedance applications. Verify that the 7-bit resolution (128 steps) meets the precision requirements, as higher resolution options exist within the MCP436X family. Ensure the SPI controller supports the required clock speeds and modes.

Digital Potentiometers Part Context

This part belongs to the MCP434X series of quad digital potentiometers. The 'MCP4341' designation indicates a 7-bit resolution with non-volatile memory. The '104' suffix specifies the 100 kΩ resistance value. The '/ST' suffix denotes the TSSOP-20 package type. It is distinct from the volatile MCP4331 and the 8-bit MCP4361 variants.

Digital Potentiometers Replacement Considerations

Direct functional replacements within the same family include MCP4341T-503E/ST (50 kΩ), MCP4341T-103E/ST (10 kΩ), and MCP4341T-502E/ST (5 kΩ). For higher resolution, consider the MCP4361T-104E/ST (8-bit). Ensure pin compatibility and voltage tolerances match when substituting.