MCP4562T-503E/MS

Digital Potentiometers Overview

The MCP4562T-503E/MS is a single-channel digital potentiometer IC featuring nonvolatile memory and an I2C serial interface. It provides 8-bit resolution with 257 taps and offers a nominal resistance (R_AB) of 50 kΩ. The device operates within a supply voltage range of 1.8V to 5.5V, supporting standard, fast, and high-speed I2C modes up to 3.4 MHz. Key features include WiperLock™ technology for securing calibration settings in EEPROM, hardware write protection via the WP pin, and high-voltage tolerant digital inputs up to 12.5V. It is housed in an 8-pin MSOP package.

Digital Potentiometers Feature Summary

• Nonvolatile Memory: Stores wiper settings automatically; supports WiperLock™ technology and 10 general-purpose memory locations.
• I2C Interface: Supports 100 kHz, 400 kHz, and 3.4 MHz clock frequencies with software and hardware write protect options.
• High-Voltage Inputs: Digital input pins (HVC/A0, A1, A2, SCL, SDA, WP) tolerate voltages up to 12.5V.
• Configuration: Single rheostat configuration with 257 taps, 75 Ω typical wiper resistance, and ±20% resistance tolerance.

Digital Potentiometers Applications

• Programmable gain amplifiers
• Voltage reference adjustment
• Audio volume control
• Sensor biasing

Digital Potentiometers Procurement Notes

Verify the specific suffix 'T' indicates tape-and-reel packaging and '/MS' denotes the 8-MSOP package. Confirm RoHS compliance status as per the latest manufacturer documentation. Ensure the design accounts for the 1.8V minimum operating voltage if using low-power supplies, noting that full analog specifications are guaranteed from 2.7V to 5.5V.

Digital Potentiometers Selection Notes

Select this model for applications requiring persistent wiper settings after power loss due to its nonvolatile EEPROM. Choose the 50k variant (-503) when a 50 kΩ total resistance is required. Ensure the I2C bus speed does not exceed 3.4 MHz, which requires VDD ≥ 4.5V and low bus capacitance (≤100 pF). Verify that the high-voltage tolerant inputs meet the system's logic level requirements.

Digital Potentiometers Part Context

This component belongs to the MCP45XX family of single-channel digital potentiometers. The '6' in the part number identifies it as an 8-bit resolution device with nonvolatile memory. The '2' suffix indicates a rheostat configuration. It shares the same core architecture and interface as volatile counterparts like the MCP4552 but adds EEPROM storage capabilities.

Digital Potentiometers Replacement Considerations

For direct functional replacement with nonvolatile memory and I2C interface, consider the MCP4562-503E/MF (DFN package) or MCP4562-503E/MY (TSSOP package). For volatile-only applications, the MCP4552 series may be suitable. Verify pinout compatibility and package dimensions before substitution.

Digital Potentiometers FAQ

What is the maximum I2C clock frequency supported?

The device supports Standard Mode (100 kHz), Fast Mode (400 kHz), and High-Speed Mode (up to 3.4 MHz). High-Speed Mode requires VDD ≥ 4.5V and bus capacitance ≤ 100 pF.

How does WiperLock™ technology work?

WiperLock™ allows the current wiper setting to be saved into the internal EEPROM. Once locked, the wiper position cannot be changed by software commands until the lock is disabled, protecting calibration settings from accidental modification.

What is the function of the HVC/A0 pin?

The HVC/A0 pin serves as the I2C slave address bit 0 (A0) during normal operation. It also acts as a high-voltage tolerant input capable of tolerating up to 12.5V, allowing the digital interface to operate at different voltage levels than the analog supply.