MCP4241-104E/ST

Digital Potentiometers Overview

The MCP4241-104E/ST is a dual-channel digital potentiometer IC featuring non-volatile memory and WiperLock technology. It provides two independent 7-bit resistor networks with 129 steps, each offering a nominal resistance of 100 kΩ. The device operates on a single supply voltage ranging from 2.7V to 5.5V, with high-voltage tolerant digital inputs up to 12.5V. Communication is handled via a standard 4-wire SPI interface supporting modes 0,0 and 1,1 at frequencies up to 10 MHz. Key features include terminal disconnect capabilities, hardware and software write protection, and an extended operating temperature range from -40°C to +125°C.

Digital Potentiometers Feature Summary

• Dual Potentiometer Configuration: Contains two independent 7-bit (129-step) digital potentiometers with 100 kΩ nominal resistance.
• Non-Volatile Memory: Stores wiper settings in EEPROM using WiperLock Technology for automatic recall upon power-up.
• High-Voltage Tolerant Inputs: Digital control pins (CS, SCK, SDI, WP, SHDN) tolerate voltages up to 12.5V.
• SPI Interface: Supports 4-wire serial communication at clock rates up to 10 MHz with read/write access to volatile and non-volatile registers.

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 'ST' suffix designation, which corresponds to the 14-lead Thin Shrink Small Outline Package (TSSOP). Confirm that the specific revision level meets project requirements, as datasheet revisions may update electrical characteristics or pinout details. Ensure compatibility with the target PCB footprint dimensions and thermal management needs for the TSSOP-14 package.

Digital Potentiometers Selection Notes

Select this component when dual-channel non-volatile resistance adjustment is required. The 100 kΩ value suits applications needing higher impedance levels compared to the 5 kΩ or 10 kΩ variants. The 7-bit resolution offers 128 steps, which may be sufficient for coarse adjustments; consider the MCP4261 if 8-bit (256 step) resolution is necessary. Verify that the 12.5V input tolerance aligns with the system's logic levels.

Digital Potentiometers Part Context

This part belongs to the MCP424X family within Microchip's broader MCP41XX/416X/424X/426X series of 7/8-bit SPI digital potentiometers. It shares core architecture with the MCP4241 but differs in packaging. The 'ST' suffix specifically denotes the TSSOP package, distinguishing it from SOIC ('SL') or PDIP ('P') variants. It is functionally identical to other packages in the same series regarding electrical performance and pinout assignments.

Digital Potentiometers Replacement Considerations

Direct replacements must maintain the dual-potentiometer, non-volatile, 7-bit specification. Equivalent parts include the MCP4241-104E/SL (SOIC package) or MCP4241-104E/P (PDIP package) for form-factor changes without electrical modification. For 8-bit resolution upgrades, the MCP4261-104E series is compatible electrically but requires verification of pinout and memory map differences.