MCP4462-503E/ST

Digital Potentiometers Overview

The MCP4462-503E/ST is a quad rheostat digital potentiometer IC manufactured by Microchip Technology. It features four independent resistor networks with a nominal resistance of 50 kΩ and 8-bit resolution, providing 257 taps. The device utilizes an I2C serial interface for control and includes nonvolatile memory to retain wiper settings. Key specifications include a supply voltage range of 2.7V to 5.5V, a typical wiper resistance of 75 Ω, and operation across an extended temperature range of -40°C to +125°C. It is housed in a TSSOP-20 package.

Digital Potentiometers Feature Summary

• Quad Resistor Network: Four independent 50 kΩ rheostats with 8-bit (257 tap) resolution.
• Nonvolatile Memory: Retains wiper settings using WiperLock™ technology and supports five general-purpose EEPROM locations.
• I2C Interface: Supports Standard Mode (100 kHz), Fast Mode (400 kHz), and High-Speed modes up to 3.4 MHz.
• High-Voltage Inputs: Digital inputs tolerate voltages up to 12.5V, enabling split-rail applications.

Digital Potentiometers Applications

• Programmable gain amplifiers
• Voltage reference trimming
• Audio volume control
• Sensor bias adjustment

Digital Potentiometers Procurement Notes

Verify the specific suffix 'E/ST' corresponds to the TSSOP-20 package and lead-free compliance when sourcing. Confirm that the application circuit accommodates the high-voltage tolerant inputs if operating near the 12.5V limit. Ensure the I2C bus speed matches the device's supported modes for reliable communication.

Digital Potentiometers Selection Notes

Select this component over volatile variants (e.g., MCP4452) when power-down state retention is required. The 50 kΩ value suits moderate impedance circuits; use lower values like 5 kΩ or 10 kΩ for higher bandwidth needs. Verify that the 2.7V minimum supply voltage aligns with the system's power rails, as the device does not support 1.8V operation unlike some family members.

Digital Potentiometers Part Context

This part belongs to the MCP444X/446X family of quad I2C digital potentiometers. The '62' designation indicates a quad rheostat configuration with nonvolatile memory and 8-bit resolution. It shares the same pinout and core architecture as the MCP4461 (potentiometer version) but is optimized for variable resistance applications rather than voltage division.

Digital Potentiometers Replacement Considerations

MCP4461-503E/ST (Potentiometer variant)

Digital Potentiometers FAQ

What is the maximum voltage tolerance for the digital input pins?

The HVC/A0, A1, SCL, SDA, WP, and RESET pins are high-voltage tolerant and can withstand up to 12.5V with respect to VSS.

How many taps does the MCP4462 provide?

As an 8-bit device, it provides 256 resistors and 257 taps per channel.

Does the device retain its setting after power loss?

Yes, it features nonvolatile memory with WiperLock™ technology that automatically recalls the saved wiper setting upon power-up.