MCP4161T-103E/MS

Digital Potentiometers Overview

The MCP4161T-103E/MS is a single-channel, 8-bit non-volatile digital potentiometer manufactured by Microchip Technology. It features WiperLock™ technology for automatic recall of saved wiper settings upon power-up. The device offers 257 taps with a nominal resistance of 10 kΩ (indicated by the '103' suffix) and operates within a supply voltage range of 2.7V to 5.5V. It utilizes a standard SPI serial interface compatible with modes 0,0 and 1,1, supporting clock frequencies up to 10 MHz. The component is housed in an 8-lead MSOP package and is rated for operation across an extended temperature range from -40°C to +125°C.

Digital Potentiometers Feature Summary

• Non-volatile memory with WiperLock™ technology for persistent wiper position storage
• 8-bit resolution providing 256 resistors and 257 distinct steps
• High-voltage tolerant digital inputs capable of withstanding up to 12.5V
• Integrated terminal disconnect feature via SHDN pin or TCON register

Digital Potentiometers Applications

• Application-specific calibration settings requiring secure storage
• Variable gain control in instrumentation circuits
• Voltage reference adjustment in measurement systems
• Audio volume control applications

Digital Potentiometers Procurement Notes

Verify that the specific ordering suffix matches the required package type and tape/reel configuration. Confirm that the design supports the high-voltage tolerant input levels if interfacing with logic voltages exceeding VDD. Ensure the PCB layout accounts for the thermal characteristics of the MSOP package during operation.

Digital Potentiometers Selection Notes

Select this model when non-volatile retention of the wiper setting is required without external battery backup. The 10 kΩ resistance value suits moderate current applications. For designs requiring volatile memory only, consider the MCP4151 variant. Verify that the system's SPI controller supports the necessary clock speeds and mode configurations.

Digital Potentiometers Part Context

This component belongs to the MCP414X/416X family of single/dual SPI digital potentiometers with non-volatile memory. The 'T' indicates tape and reel packaging, while 'MS' denotes the 8-lead Mini Small Outline Package. The '103' specifies the 10 kΩ resistance value, and 'E' typically indicates RoHS compliance.

Digital Potentiometers Replacement Considerations

The MCP4161-103E/SN serves as a pin-compatible alternative in an SOIC-8 package. For dual-channel requirements, the MCP4261 series provides similar functionality with two resistor networks.