MCP4452-503E/ST

Digital Potentiometers Overview

The MCP4452-503E/ST is a quad rheostat digital potentiometer IC manufactured by Microchip Technology. It features four independent resistor networks with a nominal resistance of 50 kΩ and 8-bit resolution, providing 257 taps. The device operates on an I²C serial interface and utilizes volatile RAM for wiper memory storage. It supports a wide operating voltage range from 1.8V to 5.5V and includes high-voltage tolerant digital inputs up to 12.5V. The component is housed in a TSSOP-14 package and is qualified under AEC-Q100 standards for automotive applications.

Digital Potentiometers Feature Summary

• Quad Rheostat Configuration: Four independent variable resistors with 50 kΩ nominal resistance and 257 taps (8-bit resolution).
• I²C Serial Interface: Supports Standard Mode (100 kHz), Fast Mode (400 kHz), and High-Speed modes (up to 3.4 MHz).
• High-Voltage Inputs: Digital input pins (HVC/A0, SCL, SDA, RESET) tolerate voltages up to 12.5V.
• Wide Operating Range: Functional operation from 1.8V to 5.5V; analog characteristics specified from 2.7V to 5.5V.

Digital Potentiometers Applications

• Automotive systems requiring AEC-Q100 qualified components.
• Split rail power supply configurations utilizing high-voltage tolerant inputs.
• Variable gain control in audio or signal processing circuits.
• Programmable biasing and reference voltage adjustment.

Digital Potentiometers Procurement Notes

Verify the specific suffix 'E' indicates RoHS compliance and the '/ST' denotes the TSSOP-14 package type. Confirm that the application requires volatile memory, as data is lost upon power removal. Ensure the I²C bus speed matches the device's support for standard, fast, or high-speed modes based on the system clock requirements.

Digital Potentiometers Selection Notes

Select this model over the MCP4451 when a rheostat (variable resistor) configuration is needed instead of a potentiometer. The 503 suffix specifies the 50 kΩ resistance value; choose 502 for 5 kΩ or 103 for 10 kΩ if different values are required. Verify that the 1.8V minimum operating voltage meets the system's low-power requirements, noting that full analog specifications apply above 2.7V.

Digital Potentiometers Part Context

This component belongs to the MCP443X/5X family of 7/8-bit volatile quad digital potentiometers. The MCP4452 specifically designates the quad rheostat variant with 8-bit resolution. It shares the same pinout and interface logic as the MCP4451 (potentiometer) and MCP4462 (non-volatile), allowing for potential pin-compatible upgrades depending on memory retention needs.

Digital Potentiometers Replacement Considerations

The MCP4451-503E/ST is a pin-compatible alternative if a potentiometer configuration is acceptable. For non-volatile memory requirements, the MCP4462-503E/ST serves as a direct functional replacement with EEPROM storage. Ensure any substitute maintains the TSSOP-14 package and I²C compatibility.