MCP4013T-103E/CH

Overview

The MCP4013T-103E/CH is a volatile, 6-bit digital potentiometer manufactured by Microchip Technology. It provides 64 taps (63 resistors) with configurable terminal A and B connections. The device supports resistance values of 2.1 kΩ, 5 kΩ, 10 kΩ, or 50 kΩ, with the '103' suffix indicating a nominal 10 kΩ total resistance. It operates on a supply voltage range of 1.8V to 5.5V for device operation and 2.7V to 5.5V for specified resistor characteristics. Control is managed via a simple Up/Down serial interface, featuring high-voltage tolerant inputs up to 12.5V. The component is housed in a compact SOT-23-6 package.

Feature Summary

• 6-bit resolution providing 64 discrete tap positions for precise resistance adjustment.
• Up/Down serial control interface allows for simple incremental or decremental wiper adjustments.
• High-voltage tolerant digital inputs capable of handling signals up to 12.5V while operating at lower logic levels.
• Low power consumption with a maximum static current of 1 µA when the serial interface is inactive.

Applications

• Volume control and gain adjustment in audio signal processing circuits.
• Programmable biasing networks for operational amplifiers and sensor interfaces.
• Digital trimming of reference voltages in measurement systems.
• Adjustable threshold setting in comparator circuits.

Procurement Notes

Verify the specific ordering suffix against the manufacturer's documentation to confirm the exact resistance value and package type. Ensure that the application environment remains within the specified temperature range of -40°C to +125°C. Confirm that the system design accounts for the volatile nature of the memory, as the wiper position resets upon power loss unless external retention is implemented.

Selection Notes

Select this component when a low-cost, single-channel digital potentiometer with a simple two-wire interface is required. The 10 kΩ resistance value is suitable for general-purpose analog signal conditioning where moderate current drive is not critical. Consider the SOT-23-6 package constraints regarding thermal dissipation and board space. Verify that the host controller can generate the necessary Up/Down timing signals to meet the setup and hold time requirements.

Part Context

This part belongs to the MCP4011/2/3/4 family of low-cost digital potentiometers. The MCP4013 variant specifically offers a potentiometer configuration, whereas the MCP4012 and MCP4014 are configured as rheostats. All members of this series share identical electrical characteristics and pinouts, differing primarily in their default internal terminal connections.

Replacement Considerations

Direct replacements within the same family include the MCP4011T-103E/CH (potentiometer) and MCP4012T-103E/CH (rheostat). Cross-family alternatives such as the MCP4131 or MCP4017 offer different interfaces like SPI or I2C but require significant schematic and firmware modifications due to protocol differences.

FAQ

What happens to the wiper setting after power is removed?

The MCP4013 utilizes volatile RAM for wiper storage. Consequently, the wiper setting is lost upon power removal and defaults to the mid-scale position (code 1Fh) upon the next power-up.

Can the CS and U/D pins handle 12V signals if VDD is 3.3V?

Yes, the digital inputs (CS and U/D) are high-voltage tolerant and can withstand up to 12.5V relative to VSS, regardless of the VDD supply voltage.

What is the typical wiper resistance for this device?

The typical wiper resistance (RW) is 75 Ω, with a maximum specified value of 125 Ω at 5.5V and 325 Ω at 2.7V.