MCP4462T-503E/ST

Digital Potentiometers Overview

The MCP4462T-503E/ST is a quad rheostat digital potentiometer IC manufactured by Microchip Technology. It features four independent resistor networks with a nominal resistance (R_AB) of 50 kΩ and ±20% tolerance. The device provides 8-bit resolution, offering 257 taps for precise adjustment. It utilizes an I²C serial interface supporting standard (100 kHz), fast (400 kHz), and high-speed modes up to 3.4 MHz. Key specifications include a typical wiper resistance of 75 Ω, nonvolatile memory with WiperLock™ technology, and operation within a supply voltage range of 2.7V to 5.5V.

Digital Potentiometers Feature Summary

• Quad Resistor Network: Contains four independent 50 kΩ rheostat channels with 8-bit (257 tap) resolution.
• Nonvolatile Memory: Features EEPROM storage for wiper settings and five general-purpose memory locations with WiperLock™ technology.
• High-Speed I²C Interface: Supports communication speeds of 100 kHz, 400 kHz, and up to 3.4 MHz.
• High-Voltage Tolerant Inputs: Digital input pins (HVC/A0, SDA, SCL, etc.) tolerate voltages up to 12.5V.

Digital Potentiometers Applications

• Programmable gain amplifiers requiring precise resistance tuning.
• Voltage reference trimming in precision measurement systems.
• Audio volume control and equalization circuits.
• Industrial process control loop calibration.

Digital Potentiometers Procurement Notes

Verify the specific suffix 'T' indicates tape-and-reel packaging when sourcing. Confirm the '-503' code corresponds to the 50 kΩ resistance value required for the design. Ensure the 'E' suffix denotes the extended temperature grade (-40°C to +125°C). Cross-reference the datasheet DS22265A for final pinout and electrical limits before procurement.

Digital Potentiometers Selection Notes

Select this model over the MCP4461 variant if a rheostat configuration is needed rather than a potentiometer. The 50 kΩ resistance value is suitable for applications requiring moderate current handling without excessive power dissipation. Consider the 75 Ω typical wiper resistance when calculating signal path losses. Verify that the I²C bus speed requirements align with the device's support for up to 3.4 MHz high-speed mode.

Digital Potentiometers Part Context

This component belongs to the MCP444X/446X family of quad digital potentiometers. The '6' in the part number identifies it as an 8-bit resolution device with nonvolatile memory. The '2' suffix specifies the quad rheostat configuration. It shares the same package options and interface protocols as other members of the MCP44xx series, differing primarily in resolution and memory type.

Digital Potentiometers Replacement Considerations

The MCP4462T-103E/ST serves as a direct functional substitute if a 10 kΩ resistance value is acceptable. For lower resistance needs, the MCP4462T-502E/ST (5 kΩ) or MCP4462T-102E/ST (10 kΩ) are compatible alternatives within the same package and feature set.