OMSI
Download cd4051.lib and cd4051.asy (symbol) from their zip archive.
: Download the .lib file and place it in your project folder. Add a Directive
If you are running your simulation and it throws errors like “Unknown subcircuit” or “Node not found” , try the following fixes:
When running your simulation, keep in mind these parameters for a standard CD4051B, which the SPICE model should generally emulate: : 3V to 18V On-Resistance ( RONcap R sub cap O cap N end-sub ) : Approximately (higher at lower voltages). cd4051 spice model link
While LTspice is the primary platform for the community models, what if you use other software?
Without these factors, your simulation will be overly optimistic.
The most significant and comprehensive resource for a CD4051 SPICE model is a file called . This library file contains functional subcircuit models for the CD4051, CD4052, and CD4053 multiplexers, along with other analog switches like the CD4016 and CD4066. The models included in SwitchAna.Lib are widely considered the de facto standard for simulating these devices in LTspice. Download cd4051
Fast digital transitions on the address pins (
: The best source for LTspice users is usually the built-in library, specifically the "SwitchAna" library. It contains modeling for 4000-series CMOS switches.
Implemented via standard MOSFET models or variable resistors controlled by the internal logic nodes. This ensures that the simulated on-resistance ( RONcap R sub cap O cap N end-sub ) changes realistically based on the supply voltage ( How to Install and Use the CD4051 Model in LTspice While LTspice is the primary platform for the
do not provide official SPICE models for parts originating from the older Harris Semiconductor line. TI E2E support forums SPICE Model Resources
This guide provides the official and community resources for sourcing a CD4051 SPICE model, explains how to integrate it into popular simulators like LTspice, and outlines troubleshooting steps for common simulation errors. Where to Find the CD4051 SPICE Model
: The SwitchAna.Lib file has been integrated into the EasyEDA online simulation platform. The project "CMOS 4016 and 4066 analogue switches" explicitly states that its SPICE models are based on the SwitchAna.Lib developed by user Robertugo_2005. This is a good validation of the model's acceptance and use within the broader community.
: The most reliable way to find a working 4051 model is through the LTspice@groups.io files section. Look for SwitchAna.Lib , which contains verified subcircuits for the CD4051, CD4052, and CD4053.