CAT5119SDI-00GT3

Digital Potentiometers Overview

The CAT5119SDI-00GT3 is a single-channel, linear-taper digital potentiometer from onsemi. It features 32 taps and an end-to-end resistance of 100 kΩ. The device operates as a variable resistor with the low terminal connected to pin 5. It utilizes a 2-wire up/down serial interface for wiper control and includes power-on reset to midscale. Electrical characteristics include a supply voltage range of 2.7 V to 5.5 V, active current of 25 µA, and standby current of 0.3 µA at 5 V. The component is housed in a space-saving SC-70 (6-pin) package.

Digital Potentiometers Feature Summary

• Configured as a variable resistor with 32-tap resolution and 100 kΩ nominal resistance.
• Operates on a single supply voltage between 2.7 V and 5.5 V.
• Features ultra-low standby current of 0.3 µA and active current of 25 µA.
• Includes glitchless switching and power-on reset to midscale position.

Digital Potentiometers Applications

• LCD screen contrast and brightness adjustment
• Gain adjustment in amplifier circuits
• Mechanical potentiometer replacement
• Line impedance matching

Digital Potentiometers Procurement Notes

Verify the specific suffix 'SDI' corresponds to the SC-70 package and '-00' indicates the 100 kΩ resistance value. Confirm RoHS compliance status and lead-free finish specifications against the latest manufacturer documentation before finalizing procurement orders.

Digital Potentiometers Selection Notes

Select this part when a digitally controlled variable resistor configuration is required rather than a potentiometer setup. Ensure the system interface supports the 2-wire up/down serial protocol. Verify that the 100 kΩ resistance range meets the circuit requirements and that the SC-70 package dimensions fit the PCB layout constraints.

Digital Potentiometers Part Context

This component belongs to the CAT511x family of 32-tap digital potentiometers. The CAT5119 variant specifically differs from the CAT5118 by connecting the low terminal to pin 5 instead of the wiper, defining its operation as a two-terminal variable resistor within the same package and interface architecture.

Digital Potentiometers Replacement Considerations

Direct replacements within the same family include CAT5119TBI-00GT3 (SOT-23 package) or CAT5119SDI-50GT3 (50 kΩ resistance). Cross-family substitutes like CAT5124 require verification of wiper resistance differences and pin compatibility.