MCP4662T-503E/UN

Digital Potentiometers Overview

The MCP4662T-503E/UN is a dual-channel digital potentiometer IC manufactured by Microchip Technology. It features two independent rheostat configurations with 8-bit resolution, providing 257 discrete taps per channel. The nominal resistance between terminals A and B (RAB) is 50 kΩ with a ±20% tolerance. The device utilizes an I²C serial interface for communication and includes nonvolatile memory to retain wiper settings during power loss. It operates within a supply voltage range of 1.8V to 5.5V and supports extended industrial temperature ranges from -40°C to +125°C.

Digital Potentiometers Feature Summary

• Dual 8-bit Digital Rheostats: Two independent channels with 257 tap positions and 50 kΩ nominal resistance.
• Nonvolatile Memory: EEPROM retains wiper settings upon power cycle; includes WiperLock™ technology for security.
• I²C Interface: Supports Standard Mode (100 kHz), Fast Mode (400 kHz), and High-Speed modes up to 3.4 MHz.
• High-Voltage Tolerant Inputs: Digital input pins tolerate voltages up to 12.5V, allowing compatibility with higher voltage logic levels.

Digital Potentiometers Applications

• Programmable gain amplifiers requiring precise resistance adjustment.
• Voltage reference trimming in measurement systems.
• Digital control of analog signal paths or bias currents.
• Calibration storage for sensor interfaces using nonvolatile memory.

Digital Potentiometers Procurement Notes

Verify the specific suffix 'T' indicates tape-and-reel packaging when sourcing components. Confirm the '503' code corresponds to the 50 kΩ resistance value required for the design. Ensure the 'UN' suffix matches the 10-pin MSOP package footprint on the PCB layout. Check for RoHS compliance status if environmental regulations apply to the final assembly.

Digital Potentiometers Selection Notes

Select this component over volatile variants (e.g., MCP4652) if power-down retention of the resistance setting is necessary. Choose the 50 kΩ version (-503) only if the circuit impedance requirements align with this value; other options include 5 kΩ, 10 kΩ, and 100 kΩ. Verify that the system's I²C bus speed does not exceed the device's maximum supported frequency for the given supply voltage.

Digital Potentiometers Part Context

This part belongs to the MCP45XX/MCP46XX family of I²C digital potentiometers. The 'MCP46' prefix denotes a dual-resistor network configuration, while '62' specifies 8-bit resolution with nonvolatile memory. The 'T' suffix typically denotes reel packaging for automated assembly, distinguishing it from tube-packaged equivalents like the MCP4662-503E/UN.

Digital Potentiometers Replacement Considerations

Direct functional substitutes within the same package include the MCP4662-503E/UN (tube pack) or MCP4662T-503E/MS (MSOP package). For single-channel applications, the MCP4562T-503E series may be considered if pinout compatibility allows. Ensure any replacement maintains the 50 kΩ resistance and nonvolatile memory characteristics.