MCP4262T-503E/UN

Digital Potentiometers Overview

The MCP4262T-503E/UN is a dual-channel digital potentiometer IC featuring non-volatile memory and an SPI serial interface. It provides two independent rheostat networks with a nominal resistance of 50 kΩ and 8-bit resolution, offering 257 discrete taps. The device operates within a supply voltage range of 2.7V to 5.5V and supports high-speed data transfers up to 10 MHz. Key features include WiperLock™ technology for securing calibration settings, hardware write protection, and resistor terminal disconnect capabilities via the SHDN pin or TCON register.

Digital Potentiometers Feature Summary

• Dual 50 kΩ Rheostat Networks: Two independent channels with 8-bit (257 tap) resolution and ±20% tolerance.
• Non-Volatile Memory: Stores wiper settings in Data EEPROM with 1M cycle endurance and automatic recall on power-up.
• SPI Interface: Supports standard 4-wire SPI at frequencies up to 10 MHz (Modes 0,0 and 1,1).
• High Voltage Inputs: Digital inputs tolerate voltages up to 12.5V, allowing compatibility with higher voltage logic levels.

Digital Potentiometers Applications

• Industrial process control systems requiring remote gain adjustment.
• Audio equipment for digital volume control and tone shaping.
• Test and measurement instruments needing precise analog signal attenuation.
• Power supply circuits for programmable reference voltage setting.

Digital Potentiometers Procurement Notes

Verify the package marking and date code against the manufacturer's latest datasheet revision. Confirm that the 'T' suffix indicates tape-and-reel packaging suitable for automated assembly. Ensure the ordering suffix matches the required RoHS compliance status and lead finish specifications defined by Microchip Technology.

Digital Potentiometers Selection Notes

Select this model when dual-channel isolation is required compared to single-potentiometer variants like the MCP42X1. The 50 kΩ resistance value balances low thermal noise with manageable current consumption. Verify that the system's microcontroller supports the specific SPI clock speeds and mode configurations required for reliable communication.

Digital Potentiometers Part Context

This component belongs to the MCP41XX/42XX family of 7/8-bit digital potentiometers with non-volatile memory. It shares core architectural features with the MCP4261 but differs in having two resistor networks instead of one. The 'UN' suffix specifically denotes the 10-lead MSOP package type used for surface-mount applications.

Digital Potentiometers Replacement Considerations

Direct functional replacements within the same family include the MCP4261T-503E/UN for single-channel applications, though pin counts differ. Cross-family alternatives from other manufacturers require verification of SPI command sets, wiper resistance characteristics, and EEPROM endurance ratings.