CAT5119TBI-50GT3

Digital Potentiometers Overview

The CAT5119TBI-50GT3 is a single-channel digital potentiometer manufactured by onsemi, formerly Catalyst Semiconductor. It features a 50 kΩ resistance value with 32 tap positions and linear taper characteristics. The device utilizes a 2-wire serial increment/decrement interface for wiper control. Operating voltage ranges from 2.7 V to 5.5 V, with a typical supply current of 25 µA. It is housed in a SC-70-6 (SOT-23-6) surface-mount package and operates within a temperature range of -40°C to +85°C.

Digital Potentiometers Feature Summary

• Single digital potentiometer with 50 kΩ total resistance and 32 adjustable taps.
• Linear taper characteristic with volatile wiper memory that retains settings during operation but loses them upon power loss.
• Controlled via a simple 2-wire serial interface supporting up/down commands.
• Low power consumption with a typical operating current of 25 µA.

Digital Potentiometers Applications

• Audio volume control and tone adjustment circuits.
• Programmable gain amplifier biasing.
• Voltage reference trimming and calibration.
• LCD contrast adjustment.

Digital Potentiometers Procurement Notes

Verify the manufacturer designation as onsemi, which acquired Catalyst Semiconductor. Confirm the specific suffix GT3 indicates the SC-70-6 tape and reel packaging configuration. Ensure compatibility with the 2.7 V to 5.5 V supply range required for the target application circuit design.

Digital Potentiometers Selection Notes

Select this component when a variable resistor function is needed with digital control via only two pins. The 50 kΩ value suits moderate impedance applications. Note that the volatile memory requires the system to re-initialize the wiper position after every power cycle if a specific starting state is critical.

Digital Potentiometers Part Context

This part belongs to the CAT5119 family of 32-tap digital potentiometers. It shares the same interface and mechanical specifications as variants with different resistance values, such as the 10 kΩ (CAT5119TBI-10) and 100 kΩ (CAT5119TBI-100) versions, allowing for pin-compatible design flexibility across different impedance requirements.

Digital Potentiometers Replacement Considerations

Direct replacements include other CAT5119 variants with adjusted resistance values if the circuit allows. Cross-family alternatives like the CAT5110 or CAT5125 offer similar functionality but may differ in configuration (variable resistor vs. potentiometer) or interface details, requiring schematic verification.