MCP4161-103E/SN

Digital Potentiometers Overview

The MCP4161-103E/SN is a single-channel, 8-bit non-volatile digital potentiometer manufactured by Microchip Technology. It features a 10 kΩ resistance between terminals A and B with 257 discrete tap positions. The device operates on a supply voltage ranging from 2.7V to 5.5V and communicates via a high-speed SPI serial interface supporting up to 10 MHz. Key specifications include a typical wiper resistance of 75 Ω, an extended operating temperature range of -40°C to +125°C, and WiperLock™ technology for automatic recall of saved settings upon power-up.

Digital Potentiometers Feature Summary

• Non-volatile memory with WiperLock™ technology for automatic wiper setting recall
• SPI serial interface compatible with modes 0,0 and 1,1 at frequencies up to 10 MHz
• High-voltage tolerant digital inputs capable of withstanding up to 12.5V
• Hardware write protect (WP) pin and software configuration bit protection

Digital Potentiometers Applications

• Gain control in audio and instrumentation circuits
• Voltage reference adjustment
• Programmable filter frequency tuning
• System calibration and trimming

Digital Potentiometers Procurement Notes

Verify the package marking and date code against the manufacturer's latest documentation to ensure authenticity. Confirm that the specific suffix 'SN' corresponds to the SOIC-8 narrow package required for the PCB layout. Check for any recent Product Change Notifications (PCNs) regarding packaging or material composition updates.

Digital Potentiometers Selection Notes

Select this component when a single resistor network with non-volatile storage is required. Ensure the system voltage falls within the 2.7V to 5.5V range for full analog specification compliance. Verify that the 10 kΩ total resistance aligns with the application's current and power dissipation limits, noting the 75 Ω typical wiper resistance.

Digital Potentiometers Part Context

This part belongs to the MCP41XX family of single digital potentiometers. It shares the same core architecture and pinout as the MCP4141 (7-bit resolution) and MCP4151 (volatile RAM). The '61' designation specifically indicates 8-bit resolution combined with non-volatile EEPROM memory.

Digital Potentiometers Replacement Considerations

The MCP4161T-103E/SN is the tape-and-reel variant of this component. For volatile applications, the MCP4151-103E/SN offers identical electrical characteristics but lacks non-volatile memory.