CAT5172TBI-50GT3

Digital Potentiometers Overview

The CAT5172TBI-50GT3 is a single-channel digital potentiometer manufactured by onsemi, featuring 256 adjustable taps for precise resistance control. It utilizes an SPI-compatible serial interface for communication and operates within a supply voltage range of 2.7 V to 5.5 V. The device incorporates a non-volatile memory (NVM) architecture that retains the wiper position upon power loss, ensuring data integrity without requiring continuous power. With a nominal resistance of 50 kOhms and a linear taper, it is housed in an 8-pin SOT-23 package suitable for surface-mount applications.

Digital Potentiometers Feature Summary

• 256-position resolution with linear taper
• SPI-compatible serial interface
• Non-volatile memory storage for wiper settings
• Single channel configuration

Digital Potentiometers Applications

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

Digital Potentiometers Procurement Notes

Verify the specific suffix GT3 against the manufacturer's current datasheet to confirm packaging details such as tape and reel specifications. Ensure compatibility with the target system's SPI clock speeds and voltage levels before finalizing procurement orders.

Digital Potentiometers Selection Notes

Select this component when a single-channel digital potentiometer with non-volatile retention is required. The 50 kOhm value suits moderate impedance applications, while the SPI interface offers flexibility compared to I2C alternatives. Confirm that the SOT-23-8 footprint aligns with the PCB design constraints.

Digital Potentiometers Part Context

This part belongs to the CAT5172 family of SPI-compatible digital potentiometers. It serves as a solid-state replacement for mechanical potentiometers in space-constrained designs. The TBI suffix typically denotes the temperature grade and package type, distinguishing it from other variants in the series.

Digital Potentiometers Replacement Considerations

Direct pin-to-pin replacements may include the CAT5171 series if I2C interface adaptation is feasible, or the AD5160 from Analog Devices for similar SPI functionality. Verify memory type and interface protocols before substitution.