MCP4442T-502E/ST

Digital Potentiometers Overview

The MCP4442T-502E/ST is a quad rheostat digital potentiometer IC manufactured by Microchip Technology. It features four independent resistor networks with a nominal resistance (R_AB) of 5 kΩ and 129 taps for 7-bit resolution. The device utilizes an I2C serial interface supporting standard, fast, and high-speed modes. It includes nonvolatile memory to retain wiper settings and offers WiperLock™ technology. Operating voltage ranges from 2.7V to 5.5V, with supply current typically at 600 µA. It operates within an extended temperature range of -40°C to +125°C and is housed in a TSSOP-14 package.

Digital Potentiometers Feature Summary

• Quad Rheostat Configuration: Four independent resistor networks with 5 kΩ nominal resistance and 129 taps.
• Nonvolatile Memory: Retains wiper settings using EEPROM with WiperLock™ technology and five general-purpose memory locations.
• I2C Interface: Supports 100 kHz, 400 kHz, and up to 3.4 MHz data rates with hardware and software write protect options.
• High Voltage Inputs: Digital inputs tolerate up to 12.5V, enabling split-rail applications.

Digital Potentiometers Applications

• Audio volume control and tone adjustment circuits
• Programmable gain amplifiers and sensor signal conditioning
• Voltage reference trimming and calibration systems
• Industrial process control loop adjustments

Digital Potentiometers Procurement Notes

Verify the specific ordering suffix 'E/ST' corresponds to the TSSOP-14 package and RoHS compliance status as listed in official Microchip documentation. Confirm that the 'T' suffix indicates tape and reel packaging if bulk quantities are required. Ensure the design supports the 2.7V to 5.5V operating voltage range and I2C bus timing requirements for the selected clock speed.

Digital Potentiometers Selection Notes

Select this component when a quad rheostat configuration is required rather than a potentiometer. The 5 kΩ resistance value suits moderate current applications, while the 7-bit resolution provides 128 distinct steps. Consider the nonvolatile memory feature if power-down state retention is necessary without external backup. Verify that the I2C address pins (HVC/A0, A1) can be configured to avoid bus conflicts in multi-device systems.

Digital Potentiometers Part Context

This part belongs to the MCP444X family of quad I2C digital potentiometers. The '44' prefix denotes the quad rheostat variant with nonvolatile memory. The '502' code specifies the 5 kΩ resistance value. The 'T' indicates tape and reel packaging, and 'ST' identifies the TSSOP-14 package type. It is functionally similar to the MCP4441 but configured as a rheostat.

Digital Potentiometers Replacement Considerations

The MCP4441T-502E/ST is a compatible alternative if a potentiometer configuration (floating one terminal) is acceptable instead of a dedicated rheostat. Other family members like the MCP4462 offer 8-bit resolution (257 taps) but may have different pinout or electrical characteristics requiring schematic review.