MCP4241T-502E/SL

Digital Potentiometers Overview

The MCP4241T-502E/SL is a dual-channel digital potentiometer IC manufactured by Microchip Technology. It features two independent 7-bit resistor networks, providing 129 adjustable tap positions per channel. The nominal resistance between terminals A and B (R_AB) is 5 kΩ with a ±20% tolerance. The device operates on a supply voltage (V_DD) ranging from 2.7V to 5.5V for full analog specification, while the serial interface supports operation down to 1.8V. It utilizes a standard 4-wire SPI interface for communication.

Digital Potentiometers Feature Summary

• Dual Potentiometer Configuration: Contains two independent 7-bit wiper-controlled resistor networks.
• Non-Volatile Memory: Includes EEPROM to store wiper settings, enabling automatic recall upon power-up via WiperLock™ technology.
• High Voltage Tolerance: Digital input pins (CS, SCK, SDI, WP, SHDN) tolerate voltages up to 12.5V, supporting split-rail applications.
• Low Power Consumption: Typical standby current is 2.5 µA when the serial interface is inactive.

Digital Potentiometers Applications

• Audio volume control and tone adjustment circuits
• Programmable gain amplifiers and sensor signal conditioning
• Voltage reference trimming and calibration systems
• LCD bias voltage generation

Digital Potentiometers Procurement Notes

Verify the package marking and date code against the manufacturer's latest datasheet revision DS22059B. Confirm that the 'T' suffix indicates tape-and-reel packaging and the 'SL' suffix corresponds to the SOIC-14 package variant. Ensure compatibility with the required operating temperature range of -40°C to +125°C for industrial or automotive environments.

Digital Potentiometers Selection Notes

Select this component when a dual-channel solution is required with non-volatile memory retention. The 5 kΩ resistance value is suitable for moderate current applications; higher resistance options (10 kΩ, 50 kΩ, 100 kΩ) are available in the same family if lower power consumption is prioritized over bandwidth. Ensure the system SPI clock speed does not exceed 10 MHz at V_DD ≥ 2.7V.

Digital Potentiometers Part Context

This part belongs to the MCP414X/424X/416X/426X family of 7/8-bit SPI digital potentiometers. The MCP4241 specifically denotes the dual-potentiometer variant with 7-bit resolution (129 steps). It differs from the MCP4231 by offering non-volatile EEPROM storage instead of volatile RAM, and from the MCP4242 by using potentiometer configuration rather than rheostat.

Digital Potentiometers Replacement Considerations

Direct functional substitutes within the same package include other MCP4241 variants with different resistance values (e.g., MCP4241-103E/SL for 10 kΩ). For single-channel applications, the MCP4141 series may be used if only one potentiometer is needed. Cross-family replacements like the MCP4251 offer 8-bit resolution but require verification of pinout and memory type compatibility.

Digital Potentiometers FAQ

What is the maximum SPI clock frequency for this device?

The maximum SCK input frequency is 10 MHz when V_DD is between 2.7V and 5.5V. At lower voltages (1.8V to 2.7V), the maximum frequency is limited to 1 MHz.

How does the device handle power-up states?

Upon power-up, the device automatically recalls the last saved wiper setting from its internal Non-Volatile Memory (EEPROM). If no data was previously stored, it defaults to the factory setting (Mid-Scale).

Can the digital inputs withstand voltages higher than V_DD?

Yes, the digital input pins (CS, SCK, SDI, WP, SHDN) are high-voltage tolerant and can withstand up to 12.5V, even if V_DD is as low as 2.7V.