CAT5110TBI-50-T3

Digital Potentiometers Overview

The CAT5110TBI-50-T3 is a single-channel digital potentiometer manufactured by onsemi, featuring a 50 kΩ end-to-end resistance and linear taper. It provides 32 discrete tap positions controlled via a 2-wire up/down serial interface (CS and U/D pins). The device operates on a single supply voltage ranging from 2.7 V to 5.5 V with an active supply current of 25 µA and standby current under 1 µA at 5 V. It utilizes a volatile memory architecture, requiring power-on reset to midscale upon initialization. The component is housed in a space-saving SOT-23-6 package.

Digital Potentiometers Feature Summary

• 32-tap resolution with 50 kΩ nominal resistance and ±20% tolerance
• 2-wire Up/Down serial interface for wiper position control
• Ultra-low standby current: 0.3 µA typical at VDD = 5 V
• Glitchless switching between resistor taps

Digital Potentiometers Applications

• LCD screen contrast and bias adjustment
• Mechanical potentiometer replacement in volume control circuits
• Adjustable gain configurations for operational amplifiers
• Line impedance matching networks

Digital Potentiometers Procurement Notes

Verify the specific ordering suffix '-T3' corresponds to tape and reel shipping quantities of 3000 units as defined in the manufacturer's ordering information table. Confirm that the 'TB' suffix indicates the SOT-23-6 package variant. Ensure compatibility with the required 2-wire serial protocol before procurement.

Digital Potentiometers Selection Notes

Select this part when a 50 kΩ linear digital potentiometer with low standby power is required. The 32-tap resolution offers moderate precision suitable for general-purpose adjustments. Verify that the system can tolerate volatile storage, as the wiper position resets to midscale upon power loss. Ensure the operating voltage range of 2.7 V to 5.5 V aligns with the system supply rails.

Digital Potentiometers Part Context

This component belongs to the CAT5110 family of 32-tap digital potentiometers. It shares the same functional block diagram and interface timing characteristics with other variants such as the CAT5118 and CAT5119, differing primarily in internal resistance values and terminal configurations (potentiometer vs. variable resistor). The TBI suffix specifically denotes the SOT-23-6 package configuration.

Digital Potentiometers Replacement Considerations

Direct pin-compatible replacements within the same family include CAT5110SDI-50-T3 (SC-70-6 package) or CAT5110TBI-10-T3/CAT5110TBI-00-T3 for different resistance values. Cross-family substitutes like the CAT5125 series offer similar functionality but may have different wiper resistance specifications.