CAT5112LI00

Digital Potentiometers Overview

The CAT5112LI-00-G is a single-channel digital potentiometer IC manufactured by onsemi. It features a 100 kΩ resistance value with 32 discrete taps and a linear taper profile. The device utilizes non-volatile memory to retain the wiper position during power-off states. Control is managed via a serial 3-wire interface, supporting up/down counting operations. It operates within a supply voltage range of 2.5 V to 6 V, with typical operation at 3.3 V or 5 V, and draws approximately 200 µA of operating current. The component is housed in an 8-pin PDIP package designed for through-hole PCB mounting.

Digital Potentiometers Feature Summary

• Non-volatile memory retains wiper settings across power cycles
• Serial 3-wire interface for simplified control logic
• Buffered wiper output for improved drive capability
• Linear resistance taper with 32 tap positions

Digital Potentiometers Applications

• Automated gain control in instrumentation systems
• Volume and tone adjustment in audio equipment
• Calibration of sensor signal conditioning circuits
• Voltage reference trimming in measurement devices

Digital Potentiometers Procurement Notes

Verify the specific suffix 'G' for RoHS compliance and lead-free status when sourcing. Confirm the 'LI' designation indicates industrial temperature range (-40°C to +85°C) versus commercial variants. Check manufacturer end-of-life notices as availability may be limited. Ensure the 3-wire serial protocol matches the host controller's capabilities before integration.

Digital Potentiometers Selection Notes

Select this model for applications requiring persistent resistance settings without battery backup. Choose the PDIP-8 package for through-hole assembly requirements. Verify that the 100 kΩ total resistance aligns with the circuit's impedance constraints. Consider the buffered wiper feature if driving low-impedance loads directly from the wiper terminal.

Digital Potentiometers Part Context

This component belongs to the CAT5112 family of 32-tap digital potentiometers. Variants differ primarily in resistance values (e.g., 10 kΩ, 50 kΩ), package types (SOIC, MSOP, PDIP), and control interfaces (Increment/Decrement vs. Serial). The LI-00 variant specifically denotes the 100 kΩ version in a DIP package with serial control.

Digital Potentiometers Replacement Considerations

Direct pin-compatible replacements include other CAT5112 variants with matching 100 kΩ resistance and serial interface, such as CAT5112VI-00-G (SOIC package). Verify that substitute components maintain the same non-volatile memory characteristics and buffer specifications.