Features • 256 taps for each potential • Potential values of 10kΩ, 50kΩ and 100kΩ
• Single and dual versions • SPI™ serial interface (modes 0,0 and 1,1)
• ±1 LSB maximum INL and DNL
• Low power CMOS technology • Maximum 1µA supply current in quiescent operation • Multiple devices can be daisy-chained together (MCP42XXX only)
• Shutdown function minimizes power dissipation with open resistors • Hardware shutdown pin on MCP42XXX
• Single power supply (2.7V - 5.5V)
• Industrial temperature range: -40°C to +85°C
• Extended temperature range: -40°C to +125°C

MCP41XXX and MCP42XXX devices 256-position, digital potentiometers available in 10kΩ, 50kΩ and 100kΩ resistor versions. The MCP41XXX are single-channel devices and are available in 8-pin PDIP or SOIC packages. The MCP42XXX contains two independent channels in a 14-pin PDIP, SOIC or TSSOP package. The wiper position of the MCP41XXX/42XXX varies linearly and is controlled via an industry standard SPI interface. device consumes <1µA during quiescent operation. A software shutdown feature is provided that disconnects the "A" from the resistor stack while the termination is connected to the "B" terminal of the wiper. Additionally, dual MCP42XXX have SHDN pins that perform the same hardware function. In shutdown mode, the content of the wiper register can be changed, and the potentiometer returns to the new value from the shutdown state. The wipers are reset to the medium-scale position (80H) after power-on. The RS (reset) pin implements a hardware reset and the mid-size wiper also returns. The MCP42XXX SPI interface includes two SI and SO pins, allowing daisy-chaining of multiple devices. The channel-to-channel resistance matching of the MCP42XXX varies by less than 1%. These devices operate from a single 2.7 - 5.5V supply and are specified over the extended and industrial temperature ranges.