MCP4352T-503E/ST

Digital Potentiometers Overview

The MCP4352T-503E/ST is a quad rheostat digital potentiometer IC from Microchip Technology, featuring an SPI serial interface and volatile memory. It provides four independent resistor networks with 8-bit resolution (257 taps) and a nominal resistance of 50 kΩ. The device operates within a supply voltage range of 1.8V to 5.5V, supporting high-voltage tolerant digital inputs up to 12.5V. Key electrical characteristics include a typical wiper resistance of 75 Ω, a bandwidth of 200 kHz for the 50 kΩ configuration, and an operating temperature range of -40°C to +125°C. It is housed in a TSSOP-20 package.

Digital Potentiometers Feature Summary

• Quad Rheostat Configuration: Four independent variable resistors with 8-bit resolution (256 steps).
• SPI Interface: Supports 10 MHz operation in Modes 0,0 and 1,1 with high-speed read/write capabilities.
• High-Voltage Inputs: Digital input pins tolerate voltages up to 12.5V regardless of VDD level.
• Terminal Disconnect: Resistor network terminals can be disconnected via the Terminal Control (TCON) register.

Digital Potentiometers Applications

• Variable gain control in audio and signal processing circuits.
• Programmable biasing and reference voltage adjustment.
• Sensor signal conditioning and impedance matching.
• Split rail power supply applications requiring isolated analog and digital domains.

Digital Potentiometers Procurement Notes

Verify the ordering suffix 'T' indicates tape and reel packaging when sourcing components. Confirm the '-503E' designation corresponds to the 50 kΩ resistance value and linear taper. Ensure the 'ST' suffix matches the required TSSOP-20 package type for PCB layout compatibility. Check RoHS compliance status through official manufacturer documentation prior to integration.

Digital Potentiometers Selection Notes

Select this component over potentiometer variants (MCP4351) when a two-terminal variable resistor configuration is required. The 8-bit resolution offers 256 discrete steps, suitable for applications needing finer control than 7-bit devices. Consider the volatile memory nature; wiper settings are lost upon power cycle unless retained by the host system. Verify that the 50 kΩ resistance aligns with the target circuit's current and bandwidth requirements.

Digital Potentiometers Part Context

This part belongs to the MCP433X/435X family of quad SPI digital potentiometers. The MCP4352 specifically denotes the rheostat configuration with 8-bit resolution. It shares features with the MCP4351 (potentiometer version) but differs in terminal usage. The 'T' suffix distinguishes it from tube-packaged versions like the MCP4352-503E/ST.

Digital Potentiometers Replacement Considerations

Direct functional substitutes within the same family include the MCP4351-503E/ST for potentiometer configurations or the MCP4332T-503E/ST for 7-bit resolution rheostats. Cross-family replacements may require interface changes if I2C is preferred. Verify pinout compatibility and thermal resistance specifications when substituting packages.