The MCP45HV51T-503E/ST is a single-channel, 8-bit digital potentiometer with a 50 kΩ resistance and volatile memory. It is designed for high-voltage applications, supporting an analog operating voltage range of 10V to 36V (or ±18V) and a separate digital supply from 2.7V to 5.5V. The device provides 256 wiper tap positions controlled via a high-speed I2C interface that supports frequencies up to 3.4 MHz. Key features include a low typical wiper resistance of 75 Ω, a terminal current of 6.5 mA, and an extended operating temperature range of -40°C to +125°C. Common applications include precision calibration, sensor trimming, adjustable gain amplifiers, and LCD contrast control.