CAT5110TBI-50GT3

Digital Potentiometers Overview

The CAT5110TBI-50GT3 is a single-channel, linear-taper digital potentiometer manufactured by onsemi. It provides 32 programmable tap positions controlled via a 2-wire up/down serial interface. The device features an end-to-end resistance of 50 kΩ with a temperature coefficient of 200 ppm/°C and a typical wiper resistance of 600 Ω. Operating on a single supply voltage between 2.7 V and 5.5 V, it draws 25 µA during active switching and 0.3 µA in standby. The unit includes power-on reset to midscale and glitchless switching capabilities, housed in a space-saving SOT-23-6 package.

Digital Potentiometers Feature Summary

• 32-tap resolution with linear taper and 50 kΩ nominal resistance
• 2-wire up/down serial interface for digital control
• Ultra-low standby current of 0.3 µA at 5 V
• Glitchless switching and power-on reset to midscale

Digital Potentiometers Applications

• LCD screen contrast adjustment
• Volume control circuits
• Mechanical potentiometer replacement
• Gain adjustment in amplifier stages
• Line impedance matching

Digital Potentiometers Procurement Notes

Verify the specific suffix 'TBI' corresponds to the SOT-23-6 package and '50' indicates the 50 kΩ resistance value. Confirm the 'GT3' suffix aligns with the required tape and reel shipping quantity of 3000 units per reel as specified in the ordering information table. Ensure compatibility with standard surface mount assembly processes.

Digital Potentiometers Selection Notes

Select this component when a digitally adjustable resistor with 32 discrete steps is required. The 50 kΩ value suits moderate impedance applications. The 2-wire interface minimizes pin count compared to I2C or SPI alternatives. Verify that the 600 Ω maximum wiper resistance meets the signal integrity requirements of the target circuit.

Digital Potentiometers Part Context

This part belongs to the CAT5110 family of 32-tap digital potentiometers. It is functionally identical to other variants in the series but differs in resistance value (50 kΩ) and physical packaging (SOT-23-6). Other family members include the CAT5118 and CAT5119 configured as variable resistors, and variants with 10 kΩ or 100 kΩ resistance values.

Digital Potentiometers Replacement Considerations

Direct functional substitutes within the same package and interface include CAT5110TBI-10GT3 (10 kΩ) and CAT5110TBI-00GT3 (100 kΩ). For different packages, the SC-70-6 variant CAT5110SDI-50GT3 offers equivalent electrical performance in a smaller footprint.