Cd4051 Spice Model Link May 2026

The Ultimate Guide to the CD4051 SPICE Model: Where to Find the Link and How to Use It

For analog and mixed-signal circuit designers, the CD4051 is a legendary component. This 8-channel analog multiplexer/demultiplexer is a go-to solution for expanding the I/O capabilities of microcontrollers, routing audio signals, or managing sensor arrays.

Finding a dedicated SPICE model for the analog multiplexer can be challenging because it is a legacy CMOS part. Many manufacturers do not provide standalone SPICE models for these older logic ICs directly on their product pages. TI E2E support forums Available Models and Alternatives LTspice Community Models cd4051 spice model link

Expected Results:

(an 8-channel analog multiplexer) often leads engineers on a bit of a digital treasure hunt. Because this is a legacy CMOS part, there isn't one single official "download" button; instead, the "story" of finding it usually involves one of these three paths: 1. The Community Library Path Most hobbyists and pros head to the LTspice Wiki The Ultimate Guide to the CD4051 SPICE Model:

• Resource Link: LTspice User Group / Files Area (Search: "CD4051")
• Alternative: Use the "Select Component Symbol" -> [OpAmps] or [Misc] folders in LTspice. Note: A native symbol is not always included by default; subcircuit instantiation is often required.
• Direct Model Note: A highly accurate unencrypted model circulates on the LTspice Groups.io mailing list, created by user contributions (e.g., models by analogspiceman or Helmut Sennewald).

She tried TI’s website first. Their product page for the CD4051 had a "tools & software" tab. There it was: a SPICE model in a .lib file, dated 2015. She clicked the download link—but the page returned a 404 error. Archived. Broken. Resource Link: LTspice User Group / Files Area