MCP4241T-104E/ST

Digital Potentiometers Overview

The MCP4241T-104E/ST is a dual-channel, non-volatile digital potentiometer from Microchip Technology. It features two independent 7-bit resistor networks with 128 taps and a nominal resistance of 100 kΩ. The device utilizes an SPI serial interface for high-speed read/write operations to wiper registers and internal EEPROM. Key specifications include a supply voltage range of 2.7V to 5.5V, low wiper resistance (typical 75 Ω), and WiperLock™ technology for secure calibration settings. It operates within an extended temperature range of -40°C to +125°C.

Digital Potentiometers Feature Summary

• Dual Potentiometers: Two independent 7-bit channels with 128 taps each.
• Non-Volatile Memory: Internal EEPROM retains wiper settings after power loss; supports WiperLock™ technology.
• SPI Interface: Compatible with Mode 0,0 and Mode 1,1 at up to 10 MHz.
• High Voltage Inputs: Digital inputs tolerate up to 12.5V, supporting split-rail applications.

Digital Potentiometers Applications

• Audio volume control and tone adjustment
• Programmable gain amplifiers
• Variable voltage references
• Instrumentation calibration

Digital Potentiometers Procurement Notes

Verify the package suffix 'ST' corresponds to the TSSOP-14 housing in official documentation. Confirm the 'E' suffix indicates RoHS compliance and lead-free manufacturing. Ensure the specific revision of DS22059B matches the required design parameters.

Digital Potentiometers Selection Notes

Select this model for applications requiring dual-channel analog resistance control with persistent state retention. The 100 kΩ value suits moderate impedance circuits. Consider the MCP4261 if higher 8-bit resolution (256 steps) is necessary instead of the 7-bit configuration provided here.

Digital Potentiometers Part Context

This component belongs to the MCP424X family of single/dual SPI digital potentiometers with non-volatile memory. It shares architectural similarities with volatile variants like the MCP4231 but adds EEPROM storage capabilities. The '104' designation specifically identifies the 100 kΩ resistance option within the series.

Digital Potentiometers Replacement Considerations

The MCP4261-104E/ST serves as a direct functional replacement offering increased 8-bit resolution (256 steps) while maintaining the same package and interface.

Digital Potentiometers FAQ

What is the maximum clock frequency for the SPI interface?

The SPI interface supports a maximum clock frequency of 10 MHz when operating between 2.7V and 5.5V.

How does WiperLock™ technology function?

WiperLock™ allows application-specific calibration settings stored in the EEPROM to be secured, preventing unauthorized modification of the wiper positions.

Can the digital inputs handle voltages higher than VDD?

Yes, the CS, SDI, SCK, WP, and SHDN pins are high-voltage tolerant and can withstand up to 12.5V, facilitating split-rail operation.