MCP4014T-502E/OT

Overview

The MCP4014T-502E/OT is a volatile, single-channel digital potentiometer IC manufactured by Microchip Technology. It features a 5 kΩ nominal resistance (±20%) with 63 resistors and 64 taps, controlled via a simple Up/Down serial interface. The device operates within a supply voltage range of 1.8V to 5.5V for logic and 2.7V to 5.5V for specified resistor characteristics. It includes high-voltage tolerant digital inputs up to 12.5V and low static current consumption of 1 µA max. Packaged in a compact SOT-23-5 surface-mount format, it supports an extended industrial temperature range from -40°C to +125°C.

Feature Summary

• 6-bit resolution providing 64 discrete tap positions for precise resistance adjustment.
• High-voltage tolerant CS and U/D inputs capable of handling signals up to 12.5V.
• Low power operation with maximum static current of 1 µA when the serial interface is inactive.
• Configurable as a rheostat or potentiometer with linear taper and typical wiper resistance of 75 Ω.

Applications

• Volume control and gain adjustment in audio signal processing circuits.
• Programmable voltage references and biasing networks in sensor interfaces.
• Adaptive filtering and impedance matching in communication systems.
• Calibration of analog-to-digital converter (ADC) reference voltages.

Procurement Notes

Verify the specific suffix 'E' indicates the extended temperature grade (-40°C to +125°C) and 'OT' denotes the SOT-23-5 tape and reel packaging configuration. Confirm that the application design accounts for the volatile nature of the wiper setting, which resets to mid-scale upon power-up unless custom settings are arranged directly with the manufacturer.

Selection Notes

Select this component when a rheostat configuration is required rather than a potentiometer setup. Ensure the system logic levels are compatible with the 1.8V minimum VIH or utilize the high-voltage tolerance feature if interfacing with 5V or higher control lines without level shifting. Verify that the 5 kΩ resistance value aligns with the target bandwidth and load requirements.

Part Context

This part belongs to the MCP401x family of low-cost, 6-bit digital potentiometers. While the MCP4011, MCP4012, and MCP4013 share similar electrical characteristics and interfaces, the MCP4014 is specifically optimized for rheostat applications. All variants in this series utilize the same Up/Down protocol and offer identical package options including SOT-23, SOIC, MSOP, and DFN.

Replacement Considerations

Direct pin-compatible replacements within the same family include the MCP4012T-502E/OT, though the MCP4012 is typically designated for potentiometer configurations. Other Microchip digital potentiometers with different resolutions or non-volatile memory require schematic redesign and are not direct substitutes.

FAQ

What is the default wiper position after power-on?

Upon power-up, the wiper defaults to the mid-scale position (Code 1Fh). Custom power-on recall settings are available only by contacting the factory directly.

How does the device handle high-voltage control signals?

The CS and U/D pins are high-voltage tolerant, allowing them to accept input voltages up to 12.5V while the device operates on a lower supply voltage such as 1.8V or 3.3V.

Is the resistance setting retained when power is removed?

No, the MCP4014 uses volatile RAM for the wiper register. The setting is lost when power is removed and reverts to the mid-scale default upon the next power cycle.