MCP4562T-104E/MS

Digital Potentiometers Overview

The MCP4562T-104E/MS is a single-channel digital rheostat from Microchip Technology, housed in an 8-pin MSOP package. It features an 8-bit resistor network providing 257 taps with a nominal resistance (R_AB) of 100 kΩ and a typical wiper resistance of 75 Ω. The device utilizes a nonvolatile EEPROM to retain the wiper setting upon power loss, supported by WiperLock™ technology for security. It communicates via an I²C serial interface compatible with standard, fast, and high-speed modes. Operating voltage ranges from 1.8V to 5.5V, with extended temperature coverage from -40°C to +125°C.

Digital Potentiometers Feature Summary

• Nonvolatile Memory: Stores wiper settings in EEPROM with automatic recall on power-up; supports WiperLock™ and 10 general-purpose memory locations.
• I²C Interface: Supports 100 kHz, 400 kHz, and up to 3.4 MHz High-Speed mode with hardware/software write protect capabilities.
• High-Voltage Inputs: Digital inputs (HVC/A0, SDA, SCL, WP) tolerate voltages up to 12.5V, allowing operation with higher logic levels.
• Low Power Consumption: Typical inactive current is 2.5 µA; includes Brown-out Reset protection at approximately 1.5V.

Digital Potentiometers Applications

• Calibration systems requiring secure, persistent adjustment values.
• Gain control circuits in instrumentation where nonvolatile settings are critical.
• Voltage divider networks in industrial sensors operating with high-voltage tolerant logic.
• Audio volume controls or bias adjustments in automotive electronics.

Digital Potentiometers Procurement Notes

Verify the specific suffix 'T' indicates tape-and-reel packaging when ordering. Confirm the '104' code corresponds to the 100 kΩ resistance value required for the design. Ensure the 'E' suffix meets RoHS compliance standards. Check the datasheet for moisture sensitivity level (MSL) requirements prior to PCB assembly to prevent package damage during reflow soldering.

Digital Potentiometers Selection Notes

Select this model over potentiometer variants (e.g., MCP4561) when a variable two-terminal resistor configuration is needed rather than a three-terminal voltage divider. The 100 kΩ resistance value suits applications requiring lower current draw compared to 5 kΩ or 10 kΩ options. Verify that the I²C address pins (A0-A2) can be configured to avoid bus conflicts in multi-device systems.

Digital Potentiometers Part Context

This component belongs to the MCP45XX family of single-channel digital potentiometers. Unlike the MCP454X series which offers 7-bit resolution (129 steps), the MCP456X series provides 8-bit resolution (257 steps) for finer control. It shares the same pinout and interface as the dual-channel MCP4662 but contains only one resistor network.

Digital Potentiometers Replacement Considerations

MCP4562-104E/MS (Tube packaging instead of Tape & Reel).

Digital Potentiometers FAQ

What is the difference between Rheostat and Potentiometer configurations for this device?

The MCP4562 is configured as a Rheostat (two-terminal variable resistor). To use it as a Potentiometer (three-terminal voltage divider), one must select the MCP4561 variant, which has a different pinout including a dedicated Terminal A pin.

How does WiperLock™ technology function?

WiperLock™ allows the user to lock the current wiper position in the EEPROM so it cannot be changed by software commands. It also enables the locking of the 10 general-purpose memory locations to prevent unauthorized modification of calibration data.

Can the digital inputs handle voltages higher than VDD?

Yes, the HVC/A0, SDA, SCL, and WP pins are high-voltage tolerant and can withstand up to 12.5V, even if the supply voltage (VDD) is as low as 1.8V.