MCP4252T-502E/UN

Digital Potentiometers Overview

The MCP4252T-502E/UN is a dual-channel digital potentiometer IC manufactured by Microchip Technology. It features two independent rheostat configurations with 8-bit resolution, providing 256 discrete taps and 257 resistance steps. The nominal end-to-end resistance (R_AB) is 5 kΩ with a ±20% tolerance. The device utilizes a standard SPI serial interface for high-speed read/write operations to the volatile wiper registers. Operating voltage ranges from 1.8V to 5.5V, supporting low standby current of 2.5 µA typical. It includes terminal disconnect features via the SHDN pin or TCON register and operates within an extended temperature range of -40°C to +125°C.

Digital Potentiometers Feature Summary

• Dual 8-bit Digital Rheostats: Two independent channels with 256 taps each.
• SPI Interface: Supports 10 MHz clock speeds in modes 0,0 and 1,1.
• Terminal Disconnect: Allows resistor network isolation via SHDN pin or TCON register.
• High Voltage Inputs: Digital inputs tolerate up to 12.5V.

Digital Potentiometers Applications

• Programmable gain amplifiers
• Variable voltage dividers
• LCD contrast control

Digital Potentiometers Procurement Notes

Verify the specific package marking and date code against the manufacturer's latest documentation. Confirm that the 'T' suffix indicates tape and reel packaging suitable for automated assembly. Ensure the ordering suffix '/UN' matches the required MSOP-10 plastic package variant.

Digital Potentiometers Selection Notes

Select this model for applications requiring dual variable resistors controlled via SPI. The 5 kΩ value suits moderate impedance circuits. Note that memory is volatile; wiper settings reset to mid-scale upon power-up. For non-volatile storage requirements, consider the MCP4262 series instead.

Digital Potentiometers Part Context

This component belongs to the MCP413X/415X/423X/425X family of single and dual SPI digital potentiometers. It shares core architecture with the MCP4152 but offers dual channels. The '502' designation specifically indicates the 5 kΩ resistance value within this product line.

Digital Potentiometers Replacement Considerations

Direct functional substitutes include other MCP4252 variants with different packages (e.g., MCP4252-502E/ML). Cross-family replacements like the MCP4262 offer similar specs but add non-volatile memory capabilities.