Finding models for older CMOS ICs (4000 series) can be tough, as they are not always provided by modern manufacturers like TI. Here are the best sources: The Best Choice: LTspice Community Model
Below is a guide to obtaining the and how to use it in popular simulators like LTspice or PSpice . CD4051 SPICE Model Link & Sources
These use controlled switches (voltage-controlled switches) and logic gates to simulate the CD4051. They simulate incredibly fast, prevent convergence errors, and accurately replicate the RONcap R sub cap O cap N end-sub (typically around depending on the supply voltage).
: Often, Texas Instruments provides SPICE models for their CMOS logic families, including the CD4051B. Searching the TI E2E forum for "CD4051B SPICE" can provide user-uploaded files. cd4051 spice model link
(high-speed CMOS version) is more commonly available and can often be found in standard digital libraries like the 74HC40xx switches ZIP Built-in Simulator Libraries NI Multisim
: Sites like Datasheet Archive aggregate technical documents and occasional SPICE netlists for various versions of the CD4051. 2. Integration & Simulation Tips
: While onsemi provides modern "Physical and Scalable" SPICE models for newer components, older parts like the CD4051 may be found within their legacy application notes or ZIP archives under "Technical Documentation" on the specific product landing page. Finding models for older CMOS ICs (4000 series)
The CD4051 works like a digitally controlled 1-pole, 8-throw rotary switch. It contains three binary select inputs (A, B, C), an active-high Inhibit (INH) input, a common input/output (COM), and eight independent channels (X0 to X7). Go to product viewer dialog for this item. Ic CD4051 Single 8-Ch Analog Multiplexer
: 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.
In this comprehensive guide, we will provide verified , explain how to import them, and offer troubleshooting tips for common simulation errors. (high-speed CMOS version) is more commonly available and
Because the CD4051 is a legacy component, official manufacturer SPICE files can sometimes be elusive, though active semiconductor manufacturers provide modern equivalents. The most reliable resources are outlined below:
Even with a verified model, you may encounter problems. Here is a troubleshooting guide based on common user experiences.