Cd4051 Spice Model Link < EASY × 2026 >

There is no single official SPICE model for the Go to product viewer dialog for this item.

8-channel analog multiplexer/demultiplexer directly hosted by major manufacturers like Texas Instruments. However, you can find community-verified models and functional equivalents through the following resources: Community & Alternative SPICE Models

LTspice Groups.io: A common source for these models is the LTspice Groups.io platform, which provides .lib or .sub files containing definitions for the CD4051, CD4052, and CD4053.

CD4000 Library for LTspice: You can download the widely used CD4000_v.lib which includes subcircuits for various 4000-series logic, including multiplexers. GitHub Repositories

: The AcheronProject/acheron_ltspice repository contains a SPICE model for the SN74LV4051A

, which is an 8:1 analog multiplexer that can often serve as a functional substitute in simulations. Suggested Functional Alternatives (with PSPICE Models) cd4051 spice model link

If you cannot find a suitable raw CD4051 model, experts often recommend using newer parts that have official, high-quality models: Texas Instruments TMUX1308QPWRQ1 IC MUX 8:1 195OHM 16TSSOP Go to product viewer dialog for this item. Texas Instruments suggests using the TMUX1308-Q1 PSPICE model for similar functionality. Texas Instruments CD74HC4051MM96EP IC MUX 8:1 130OHM 16SOIC Go to product viewer dialog for this item.

A model for this high-speed CMOS version is available in some community libraries (e.g., LTspice Yahoo/Groups.io archives). How to Implement in Simulation

Add the Library: Download the .lib file and place it in your project folder. Add a Directive

: In LTspice, use the spice directive .lib your_filename.lib to include the model.

Create/Assign Symbol: Place a generic multiplexer symbol and right-click to change its "Value" or "SpiceModel" attribute to . SPICE model for CD4051B? - Logic forum - TI E2E There is no single official SPICE model for

I dont believe so. you might search other modeling sites on the web and see if it is in their libraries or look at NXP HEF4051. TI E2E support forums

CD4051B data sheet, product information and support | TI.com

Why You Might Want to Build Your Own

If you are using a simulator that doesn't support PSpice syntax (like some stripped-down versions of Multisim or Tinkercad), you may need to construct the model using primitives.

The CD4051 is essentially an 8-to-1 decoder attached to 8 transmission gates. You can build a functional model by:

Using a 3-to-8 Decoder (standard logic primitives) to drive enable lines.
Using Voltage Controlled Switches (S1 in SPICE) for the channels.
Adding a Resistor in series with the switch to mimic the On-Resistance ($R_on$).

🔗 The Reliable CD4051 SPICE Model Link

After digging through vendor archives and community forums, here’s the most reliable, simulation-ready CD4051 SPICE model: Why You Might Want to Build Your Own

✅ Texas Instruments CD4051B PSpice Model
🔗 Direct link (TI official):
[Insert actual TI model link here — e.g., https://www.ti.com/product/CD4051B/toolssoftware]
(Look for “PSpice Model” under Simulation Models)

Alternatively, if you prefer a vendor-agnostic version:

✅ Philips/NXP CD4051 SPICE model (archived but still accurate)
🔗 [Insert link to model file from a trusted repo like GitHub or ECMag]

3.3. Open Source: ngspice / KiCad

For users of the KiCad/ngspice ecosystem, models are typically found in open repositories.

Resource Link: Ngspice Documentation / Model Library
Implementation: Users often utilize a behavioral model using voltage-controlled switches (SW component) to replicate the functionality if a specific subcircuit is unavailable.