MCP4551-104E/MS

Digital Potentiometers Overview

The MCP4551-104E/MS is a single-channel, 8-bit digital potentiometer IC manufactured by Microchip Technology. It features an I2C serial interface and volatile memory for wiper settings. The device offers a total resistance (RAB) of 100 kΩ with 256 taps and supports operation across a wide voltage range of 1.8V to 5.5V. Key electrical characteristics include a typical wiper resistance of 75Ω, a bandwidth of 100 kHz at 100 kΩ, and high-voltage tolerant digital inputs up to 12.5V. It operates within an extended temperature range of -40°C to +125°C.

Digital Potentiometers Feature Summary

• I2C Serial Interface supporting 100 kHz, 400 kHz, and 3.4 MHz speeds
• 8-bit resolution providing 256 discrete tap positions
• High-Voltage Tolerant Digital Inputs (up to 12.5V)
• Brown-Out Reset Protection with 1.5V typical threshold

Digital Potentiometers Applications

• Volume control in audio systems
• Gain adjustment in instrumentation amplifiers
• Voltage reference trimming
• Programmable biasing circuits

Digital Potentiometers Procurement Notes

Verify the specific suffix 'E/MS' corresponds to the MSOP-8 package and commercial/industrial temperature grade as defined in the datasheet. Confirm that the system design accommodates volatile memory behavior, as wiper settings are lost upon power loss. Ensure I2C bus pull-up resistors are selected appropriately for the chosen clock speed and bus capacitance limits.

Digital Potentiometers Selection Notes

Select this component when an 8-bit resolution and 100 kΩ nominal resistance are required. The MCP4551 is suitable for applications needing high-voltage tolerant logic interfaces on the SDA/SCL lines. For non-volatile storage requirements, consider the MCP4561 variant instead. Verify that the 1.8V minimum operating voltage meets the system's low-power supply constraints.

Digital Potentiometers Part Context

This part belongs to the MCP45XX family of single-channel digital potentiometers. It shares the same pinout and core architecture as the MCP4531 (7-bit) and MCP4561 (non-volatile). The '104' designation indicates the 100 kΩ resistance value, while 'E' typically denotes the temperature range and 'MS' specifies the MSOP-8 package.

Digital Potentiometers Replacement Considerations

Direct functional replacements within the same family include the MCP4551T-104E/MS (tape and reel packaging) or the MCP4551-104E/MF (DFN package). Cross-family alternatives like the MCP4232 offer SPI interfaces but require different control logic.