MCP4361T-503E/ML

Digital Potentiometers Overview

The MCP4361T-503E/ML is a quad digital potentiometer IC from Microchip Technology, featuring four independent resistor networks with non-volatile memory. It provides 257 taps (8-bit resolution) and supports R_AB resistance options including 50 kΩ. The device operates on an SPI serial interface at frequencies up to 10 MHz and utilizes WiperLock™ technology for automatic recall of saved wiper settings upon power-up. It offers low wiper resistance (typical 75 Ω), high-voltage tolerant digital inputs up to 12.5V, and supports split-rail applications within a wide operating voltage range of 2.7V to 5.5V.

Digital Potentiometers Feature Summary

• Quad Resistor Network: Four independent potentiometers or rheostats with 257 taps (8-bit resolution).
• Non-Volatile Memory: WiperLock™ technology automatically recalls saved wiper settings after power cycles.
• SPI Interface: High-speed serial communication supporting modes 0,0 and 1,1 with SCK frequencies up to 10 MHz.
• High-Voltage Tolerant Inputs: Digital input pins (CS, SDI, SCK, WP, RESET) tolerate voltages up to 12.5V.

Digital Potentiometers Applications

• Audio volume control and tone adjustment circuits.
• Programmable gain amplifiers and variable impedance matching.
• Sensor calibration and offset trimming in instrumentation.
• Adjustable reference voltage generation in data acquisition systems.

Digital Potentiometers Procurement Notes

Verify the ordering suffix 'T' indicates tape-and-reel packaging and '/ML' specifies the 20-lead QFN package. Confirm the '-503' code corresponds to the 50 kΩ resistance value. Ensure compatibility with the required SPI mode and voltage levels before procurement.

Digital Potentiometers Selection Notes

Select this component when four independent digital potentiometers with non-volatile storage are required. The 50 kΩ resistance value suits moderate current applications. Verify that the system voltage falls within the 2.7V to 5.5V specified range for full electrical characteristics. Consider the 20-QFN package dimensions for PCB layout constraints.

Digital Potentiometers Part Context

This part belongs to the MCP434X/436X family of 7/8-bit quad SPI digital potentiometers with non-volatile memory. The MCP4361 variant specifically offers 8-bit resolution (257 taps) compared to the 7-bit MCP4341 (129 taps). All variants share similar pinouts and command sets but differ in resolution and memory type.

Digital Potentiometers Replacement Considerations

Direct replacements include other MCP4361 variants with different resistance values (e.g., MCP4361-103E/ML for 10 kΩ) or packages. For volatile memory applications, the MCP4351 series may be considered if non-volatile retention is not required.