MCP4462-103E/ST

Digital Potentiometers Overview

The MCP4462-103E/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 is 10 kΩ (suffix -103). The device utilizes an I2C serial interface supporting standard, fast, and high-speed modes up to 3.4 MHz. It includes nonvolatile memory with WiperLock™ technology to retain wiper settings after power cycles. Operating voltage ranges from 2.7 V to 5.5 V for full specifications, with operation down to 1.8 V 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: EEPROM retains wiper settings via WiperLock™ technology upon power-up.
• 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 12.5 V.

Digital Potentiometers Applications

• Programmable gain amplifiers requiring precise resistance adjustment.
• Voltage reference trimming in precision measurement systems.
• Audio volume control or tone shaping circuits using rheostat configuration.
• Bias current setting in analog front-end modules.

Digital Potentiometers Procurement Notes

Verify the specific ordering suffix against the manufacturer's datasheet to confirm package type and temperature range. The 'ST' suffix indicates a TSSOP-14 package. Ensure the design supports the required I2C bus speed and voltage levels, as high-speed mode requires specific supply voltage conditions. Check for RoHS compliance status in the latest product release notes.

Digital Potentiometers Selection Notes

Select this component when a quad rheostat configuration is required rather than a potentiometer. The -103 suffix denotes a 10 kΩ nominal resistance; choose -053 for 5 kΩ, -503 for 50 kΩ, or -104 for 100 kΩ if different values are needed. This model is suitable for applications needing nonvolatile storage of resistance settings. Compare with MCP4461 if potentiometer terminals are required instead of rheostat connections.

Digital Potentiometers Part Context

This part belongs to the MCP444X/446X family of 7/8-bit Quad I2C Digital POTs with Nonvolatile Memory. The MCP4462 specifically designates the quad rheostat variant with 8-bit resolution. It shares the same pinout and core functionality as the MCP4461 (potentiometer version) but differs in terminal connectivity options. The family supports split-rail applications and offers terminal disconnect features via the TCON register.

Digital Potentiometers Replacement Considerations

MCP4461-103E/ST: Identical electrical characteristics and package, but configured as a quad potentiometer rather than a rheostat. Pin compatibility exists, but circuit topology must be adjusted to utilize floating terminals A or B appropriately.