MCP4532T-502E/MS

Digital Potentiometers Overview

The MCP4532T-502E/MS is a single-channel digital rheostat manufactured by Microchip Technology. It features an I2C serial interface and volatile memory, providing 129 discrete resistance steps (7-bit resolution). The device offers a nominal end-to-end resistance of 5 kΩ with a ±20% tolerance. It operates within a supply voltage range of 1.8V to 5.5V and supports I2C clock frequencies up to 3.4 MHz. The component is housed in an 8-pin MSOP package and is rated for operation across an extended temperature range of -40°C to +125°C.

Digital Potentiometers Feature Summary

• I2C Serial Interface: Supports Standard Mode (100 kHz), Fast Mode (400 kHz), and High-Speed Mode (up to 3.4 MHz).
• Volatile Memory Configuration: Wiper settings are lost upon power loss; resets to mid-scale upon Power-On Reset.
• High-Voltage Tolerant Inputs: Digital inputs tolerate voltages up to 12.5V, allowing compatibility with higher voltage logic levels.
• Rheostat Operation: Configured as a variable resistor between terminals A and W, with terminal B left floating or connected to W.

Digital Potentiometers Applications

• Programmable gain amplifiers requiring precise analog signal attenuation.
• Voltage reference trimming and calibration circuits.
• Digital potentiometer replacement in volume control applications.
• Bias current adjustment in sensor interfaces.

Digital Potentiometers Procurement Notes

Verify the 'T' suffix indicates tape-and-reel packaging rather than tube. Confirm the '502' code corresponds to the 5 kΩ resistance value. Ensure the 'E' suffix denotes RoHS compliance. Cross-reference the specific revision level against the latest datasheet DS22096B to confirm pinout and electrical specifications remain unchanged.

Digital Potentiometers Selection Notes

Select this model over non-volatile variants (MCP4542/MCP4562) when power-down retention is unnecessary. Choose the 5 kΩ variant (-502) if lower thermal noise and higher bandwidth are required compared to 50 kΩ versions. Verify that the system can tolerate wiper setting loss during power cycles, as this device uses RAM rather than EEPROM or Flash.

Digital Potentiometers Part Context

This part belongs to the MCP453X family, which specifically utilizes volatile memory. It shares the same physical footprint and I2C protocol as the non-volatile MCP454X and MCP456X series but differs in data retention behavior. The 'T' suffix distinguishes it from the standard tube-packaged MCP4532, indicating reel-based manufacturing for automated assembly.

Digital Potentiometers Replacement Considerations

Direct functional substitutes include MCP4532-502E/MS (tube package) or MCP4532-502E/MF (DFN package). For non-volatile requirements, consider MCP4542-502E/MS or MCP4562-502E/MS, noting the different power-up default states and operating voltage minimums (2.7V vs 1.8V).