MCP4551T-103E/MS

Digital Potentiometers Overview

The MCP4551T-103E/MS is a single-channel, volatile digital potentiometer IC manufactured by Microchip Technology. It features an I2C serial interface and provides 256 adjustable taps with a nominal resistance of 10 kΩ (indicated by the '103' suffix). The device operates within a supply voltage range of 1.8V to 5.5V and supports standard, fast, and high-speed I2C modes up to 3.4 MHz. Packaged in an 8-pin MSOP format, it includes high-voltage tolerant digital inputs and a terminal disconnect feature controlled via the TCON register.

Digital Potentiometers Feature Summary

• I2C Serial Interface: Supports 100 kHz, 400 kHz, and 3.4 MHz clock speeds.
• Resolution: 8-bit resolution providing 257 steps (256 taps) for precise adjustment.
• Resistance Options: Available in 5 kΩ, 10 kΩ, 50 kΩ, and 100 kΩ values; this model is 10 kΩ.
• Low Power: Typical inactive current of 2.5 µA at VDD = 5.5V.

Digital Potentiometers Applications

• Programmable gain amplifiers
• Voltage reference trimming
• Digital volume control in audio circuits
• Sensor bias adjustment

Digital Potentiometers Procurement Notes

Verify the ordering suffix 'T' indicates tape-and-reel packaging and '/MS' denotes the MSOP-8 package. Confirm the '103' code corresponds to the 10 kΩ resistance value. Ensure the system design accounts for volatile memory behavior where wiper settings are lost upon power loss. Check humidity sensitivity levels for storage and handling requirements.

Digital Potentiometers Selection Notes

Select the MCP4551T-103E/MS when a single-channel, volatile digital potentiometer with I2C control is required. Choose this part over non-volatile variants (MCP4561) if power-down retention is not needed. Verify that the 10 kΩ resistance fits the circuit impedance requirements and that the 1.8V to 5.5V operating range matches the system supply voltage.

Digital Potentiometers Part Context

This component belongs to the MCP45XX family of single-channel digital potentiometers. The '51' designation specifically identifies it as an 8-bit, volatile, potentiometer-configured device. It shares the same pinout and interface as other members of the MCP453X/455X series but differs in resolution and memory type compared to 7-bit or non-volatile counterparts.

Digital Potentiometers Replacement Considerations

Direct functional replacements within the same family include MCP4551-103E/MS (tube packaging instead of tape-and-reel). For rheostat configurations, consider MCP4552-103E/MS. For higher resolution, MCP4651-103E/MS offers dual channels. Ensure any substitute maintains the MSOP-8 package and I2C compatibility.