MCP4231T-103E/SL

Digital Potentiometers Overview

The MCP4231T-103E/SL is a dual-channel, 7-bit digital potentiometer manufactured by Microchip Technology. It features two independent resistor networks with 128 taps (129 steps) and a nominal resistance of 10 kΩ between terminals A and B. The device operates via an SPI serial interface supporting modes 0,0 and 1,1 at frequencies up to 10 MHz. It utilizes volatile memory for wiper settings and supports split-rail applications with high-voltage tolerant digital inputs up to 12.5V. The component is housed in a 14-pin TSSOP package and functions within a supply voltage range of 1.8V to 5.5V.

Digital Potentiometers Feature Summary

• Dual 7-bit resistor network configuration with 129 steps per channel
• SPI serial interface operating at clock frequencies up to 10 MHz
• High-voltage tolerant digital inputs capable of withstanding up to 12.5V
• Supports split-rail applications and includes a shutdown pin for terminal disconnect

Digital Potentiometers Applications

• Programmable gain amplifiers requiring precise resistance adjustment
• Voltage reference trimming in measurement systems
• Audio volume control circuits utilizing rheostat configurations
• Variable biasing networks in analog signal processing

Digital Potentiometers Procurement Notes

Verify the specific suffix 'T' indicates tape and reel packaging and 'SL' denotes the 14-pin TSSOP package format. Confirm that the '-103' code corresponds to the 10 kΩ resistance value. Ensure the source document explicitly lists this part number as available from the manufacturer or authorized distributors before proceeding with acquisition.

Digital Potentiometers Selection Notes

Select this component when dual independent digital potentiometers are required in a compact surface-mount package. The 7-bit resolution provides 128 adjustment steps, suitable for applications not requiring fine 8-bit granularity. Verify that the system can tolerate volatile memory behavior, as wiper settings are lost upon power loss unless backed up externally.

Digital Potentiometers Part Context

This device belongs to the MCP413X/415X/423X/425X family of single and dual SPI digital potentiometers. The MCP4231 variant specifically offers dual potentiometer channels with 7-bit resolution. It shares architectural similarities with the MCP4251 but differs in bit-depth and step count. The family supports both potentiometer and rheostat configurations through flexible pinout options.

Digital Potentiometers Replacement Considerations

The MCP4231-103E/P serves as a pin-compatible replacement in PDIP-14 packages. For higher resolution requirements, the MCP4251-103 series offers 8-bit resolution with 257 steps. Single-channel alternatives include the MCP4131-103 series.