MCP4341T-503E/ST

Digital Potentiometers Overview

The MCP4341T-503E/ST is a quad-channel digital potentiometer IC from Microchip Technology, housed in a TSSOP-20 package. It features four independent resistor networks with 7-bit resolution (129 taps) and an R_AB resistance of 50 kΩ. The device utilizes a non-volatile memory architecture with WiperLock™ technology to retain wiper settings after power loss. It operates on a supply voltage range of 2.7V to 5.5V and supports high-speed SPI serial interfaces up to 10 MHz. Key electrical characteristics include a typical wiper resistance of 75 Ω and low temperature coefficients for both absolute and ratiometric configurations.

Digital Potentiometers Feature Summary

• Quad Resistor Network: Four independent potentiometers or rheostats with 7-bit resolution (129 taps).
• Non-Volatile Memory: WiperLock™ technology automatically recalls saved wiper settings upon power-up.
• SPI Interface: Supports 10 MHz operation in modes 0,0 and 1,1 with high-speed read/write capabilities.
• High Voltage Inputs: Digital inputs tolerate up to 12.5V, supporting split-rail applications.

Digital Potentiometers Applications

• Programmable gain amplifiers requiring precise resistance adjustment.
• Voltage reference trimming in measurement systems.
• Audio volume control circuits utilizing linear taper characteristics.
• Industrial process control loops needing remote resistance tuning.

Digital Potentiometers Procurement Notes

Verify the ordering suffix 'ST' corresponds to the TSSOP-20 package configuration as specified in the datasheet. Confirm that the '-503' suffix indicates the 50 kΩ resistance value required for the specific circuit design. Ensure compatibility with the 2.7V to 5.5V operating voltage range and check for any specific moisture sensitivity level requirements during storage and handling.

Digital Potentiometers Selection Notes

Select this component when four independent digital potentiometers are needed in a single package. The 7-bit resolution provides 128 steps, suitable for applications not requiring fine 8-bit granularity. The 50 kΩ resistance value offers a balance between current consumption and noise immunity. Consider the non-volatile feature if power-down state retention is critical without external battery backup.

Digital Potentiometers Part Context

This part belongs to the MCP434X family of quad SPI digital potentiometers. The '4' in the model number denotes the inclusion of non-volatile EEPROM memory, distinguishing it from volatile RAM-based variants like the MCP433X. The '1' suffix indicates a potentiometer configuration, whereas '2' would denote a rheostat. This series is designed for applications requiring persistent resistance settings across power cycles.

Digital Potentiometers Replacement Considerations

Direct replacements within the same package and pinout include other MCP4341 variants with different resistance values (e.g., -103 for 10 kΩ, -104 for 100 kΩ). For higher resolution needs, the MCP4361 offers 8-bit resolution (257 taps) in the same package. Cross-family replacements like the MCP4241 require verification of interface compatibility and memory type differences.