CAT5125TBI-00GT3

Digital Potentiometers Overview

The CAT5125TBI-00GT3 is a single-channel, linear-taper digital potentiometer from the CAT5125 family. It features 32 programmable taps and an end-to-end resistance of 100 kΩ. The device operates on a single supply voltage ranging from 2.7 V to 5.5 V with an active current of 25 µA and standby current as low as 0.3 µA. It utilizes a 2-wire up/down serial interface for wiper control and includes power-on reset functionality that sets the wiper to midscale upon initialization. The component is housed in a space-saving SOT-23-6 surface-mount package.

Digital Potentiometers Feature Summary

• 32-Tap Linear Digital Potentiometer with 100 kΩ nominal resistance
• 2-Wire Up/Down Serial Interface (CS and U/D pins)
• Ultra-low Standby Current: 0.3 µA typical at VDD = 5 V
• Glitchless switching between resistor taps
• Power-on Reset (POR) to Midscale position

Digital Potentiometers Applications

• LCD Screen Adjustment
• Volume Control
• Mechanical Potentiometer Replacement
• Gain Adjustment
• Line Impedance Matching

Digital Potentiometers Procurement Notes

Verify the specific suffix 'GT3' against the manufacturer's ordering information table to confirm tape and reel shipping quantities and RoHS compliance status. Confirm availability as some variants within this family may require factory contact. Ensure the 100 kΩ resistance value matches the '-00' designation in the part number.

Digital Potentiometers Selection Notes

Select this component when a high-resistance digital potentiometer (100 kΩ) is required. The CAT5125 series offers lower wiper resistance (80 Ω typical) compared to the CAT5110 series (200 Ω typical), which may benefit high-frequency or precision applications. Ensure the circuit design accommodates the 2-wire serial interface timing requirements for CS and U/D signals.

Digital Potentiometers Part Context

This part belongs to the CAT5110/CAT5118/CAT5119/CAT5123/CAT5124/CAT5125 family of 32-tap digital potentiometers. While functionally similar to the CAT5110, the CAT5125 variant is distinguished by its lower wiper resistance specification (80 Ω typical vs. 200 Ω typical). Both are configured as potentiometers with three terminals (H, L, W) plus power and ground.

Digital Potentiometers Replacement Considerations

CAT5125TBI-10GT3 (10 kΩ version), CAT5125TBI-50GT3 (50 kΩ version). Note that these share the same package and interface but differ in end-to-end resistance values.