MCP4241T-103E/ST

Digital Potentiometers Overview

The MCP4241T-103E/ST is a dual-channel, non-volatile digital potentiometer manufactured by Microchip Technology. It features two independent potentiometer circuits with 7-bit resolution, providing 129 discrete taps for precise resistance adjustment. The nominal end-to-end resistance (R_AB) is 10 kΩ with a ±20% tolerance. The device operates on a supply voltage (V_DD) ranging from 2.7V to 5.5V and supports an SPI serial interface with clock frequencies up to 10 MHz. It utilizes WiperLock™ technology to store wiper settings in internal EEPROM, ensuring data retention without power.

Digital Potentiometers Feature Summary

• Dual Potentiometer Configuration: Two independent channels with 7-bit resolution (129 steps).
• Non-Volatile Memory: Internal EEPROM retains wiper settings via WiperLock™ technology after power loss.
• SPI Interface: Supports Mode 0,0 and Mode 1,1 with SCK frequencies up to 10 MHz.
• High Voltage Tolerance: Digital inputs tolerate voltages up to 12.5V, allowing compatibility with higher voltage logic systems.

Digital Potentiometers Applications

• Audio volume control and tone adjustment circuits.
• Programmable gain amplifiers and sensor signal conditioning.
• Voltage reference trimming and calibration systems.
• Industrial process control requiring remote resistance adjustment.

Digital Potentiometers Procurement Notes

Verify the package type matches the design requirements; the 'ST' suffix indicates a 14-pin TSSOP package. Confirm that the system's SPI controller supports the required clock speeds and modes. Ensure the PCB layout accounts for the exposed thermal pad if applicable, although this specific package variant primarily uses standard leads. Check for any specific environmental compliance certifications required by the target market.

Digital Potentiometers Selection Notes

Select the MCP4241T-103E/ST when dual-channel analog resistance control with memory is needed. The 10kΩ value suits moderate impedance applications; choose -502 or -104 variants for different resistance ranges. The non-volatile feature eliminates the need for external storage components. Ensure the operating voltage range of the host microcontroller aligns with the device's 2.7V to 5.5V specification.

Digital Potentiometers Part Context

This component belongs to the MCP414X/416X/424X/426X family of 7/8-bit SPI digital potentiometers. The MCP4241 specifically denotes the dual-potentiometer, 7-bit, non-volatile variant. It shares architectural similarities with volatile counterparts like the MCP4231 but adds EEPROM capabilities for persistent state management across power cycles.

Digital Potentiometers Replacement Considerations

Direct replacements include other MCP4241 variants with different resistance values (e.g., MCP4241-502, MCP4241-104) or packages. For single-channel applications, the MCP4141 may be suitable. Volatile alternatives like the MCP4231 can replace it if power-loss retention is not required, though software initialization will be necessary upon startup.