MCP4462T-103E/ST

Digital Potentiometers Overview

The MCP4462T-103E/ST is a quad rheostat digital potentiometer IC manufactured by Microchip Technology. It features four independent resistor networks with 8-bit resolution, providing 257 taps per channel. The nominal resistance (RAB) is 10 kΩ with a ±20% tolerance. The device utilizes an I2C serial interface supporting standard (100 kHz), fast (400 kHz), and high-speed modes up to 3.4 MHz. It includes nonvolatile memory for wiper settings and five general-purpose EEPROM locations. Operating voltage ranges from 2.7V to 5.5V for full specification, with operation down to 1.8V for the serial interface only. The package is TSSOP-14.

Digital Potentiometers Feature Summary

• Quad Rheostat Configuration: Four independent variable resistors with 8-bit (257 tap) resolution.
• Nonvolatile Memory: Stores wiper positions automatically; includes WiperLock™ technology and five user-programmable EEPROM locations.
• High-Speed I2C Interface: Supports 100 kHz, 400 kHz, and up to 3.4 MHz clock frequencies.
• High-Voltage Tolerant Inputs: Digital inputs (HVC/A0, SDA, SCL, etc.) tolerate voltages up to 12.5V.

Digital Potentiometers Applications

• Programmable gain amplifiers requiring precise attenuation control.
• Audio volume control circuits using variable resistance.
• Voltage reference trimming in sensor signal conditioning.
• Adjustable bias current sources in analog front-ends.

Digital Potentiometers Procurement Notes

Verify the ordering suffix '/ST' corresponds to the TSSOP-14 package when sourcing. Confirm the 'T' suffix indicates tape-and-reel packaging if reel quantity is required. Ensure the '103' code matches the 10 kΩ resistance value needed for the specific circuit design. Check for AEC-Q100 qualification requirements if automotive applications are intended.

Digital Potentiometers Selection Notes

Select this model over MCP4461 variants because it is configured as a rheostat (variable resistor) rather than a potentiometer. The 10 kΩ resistance value suits moderate impedance applications. Ensure the system supports I2C high-speed modes if operating above 400 kHz, which requires lower bus capacitance (≤100 pF). Verify that the 12.5V tolerant inputs align with the host controller's logic levels or external voltage domains.

Digital Potentiometers Part Context

This component belongs to the MCP446X family of quad I2C digital potentiometers with nonvolatile memory. It shares the same core architecture and pinout compatibility as the MCP444X series but offers higher resolution (8-bit vs 7-bit) and nonvolatile storage. The 'MCP4462' designation specifically identifies the quad rheostat configuration within this product line.

Digital Potentiometers Replacement Considerations

Direct functional substitutes include other MCP4462 variants with different resistance values (e.g., MCP4462T-104E/ST for 100 kΩ) or packages. Cross-family replacements like the MCP4662 offer similar functionality but may differ in memory type or pinout. Verify electrical parameters such as wiper resistance and bandwidth when substituting.