MCP4542T-503E/MS

Digital Potentiometers Overview

The MCP4542T-503E/MS is a single-channel digital rheostat manufactured by Microchip Technology. It features a 7-bit resistor network with 128 taps and a nominal resistance (R_AB) of 50 kΩ. The device utilizes an I²C serial interface for control and includes nonvolatile memory to retain wiper settings after power loss. It operates within a supply voltage range of 1.8V to 5.5V, with full analog specifications guaranteed from 2.7V to 5.5V. The component supports standard, fast, and high-speed I²C modes and is housed in an MSOP-8 package.

Digital Potentiometers Feature Summary

• Nonvolatile Memory: Stores wiper position automatically upon power-down; retains setting across power cycles.
• I²C Interface: Supports Standard Mode (100 kHz), Fast Mode (400 kHz), and High-Speed Modes (1.7 MHz and 3.4 MHz).
• High-Voltage Tolerant Inputs: Digital inputs (HVC/A0, SDA, SCL, WP) tolerate voltages up to 12.5V.
• WiperLock™ Technology: Allows specific EEPROM locations to be write-protected to secure calibration data.

Digital Potentiometers Applications

• Programmable gain amplifiers requiring precise resistance adjustment.
• Voltage reference trimming and calibration circuits.
• Audio volume control or tone shaping applications.
• Sensor biasing and offset adjustment networks.

Digital Potentiometers Procurement Notes

Verify the ordering suffix 'MS' corresponds to the MSOP-8 package and 'T' indicates tape-and-reel packaging. Confirm the '-503' suffix denotes the 50 kΩ resistance value. Ensure the environment meets the -40°C to +125°C operating temperature range. Check for AEC-Q100 qualification requirements if automotive compliance is necessary.

Digital Potentiometers Selection Notes

Select this model over the MCP4541 when a rheostat configuration (two terminals used) is required instead of a potentiometer. Choose the 50 kΩ variant (-503) specifically for higher impedance applications compared to the 5 kΩ or 10 kΩ options. Consider the MCP4562 if 8-bit resolution (256 steps) is needed instead of the 7-bit resolution provided here.

Digital Potentiometers Part Context

This component belongs to the MCP454X family of single-channel digital potentiometers. Unlike the volatile RAM-based MCP453X series, the MCP454X series integrates EEPROM for nonvolatile storage. It shares the same pinout and interface as the dual-channel MCP4642 but contains only one resistor network.

Digital Potentiometers Replacement Considerations

The MCP4542T-503E/MF is a direct replacement offering the same electrical characteristics in an 8-DFN (3x3) package. For higher resolution needs, the MCP4562T-503E/MS provides 8-bit resolution with identical pinout and interface.