Cd4051 Spice Model Link [hot]

1. Manufacturer application notes & simulation model files (not papers):

   • Texas Instruments (CD4051B) — PSpice model available in .lib or .cir format on their product page.
   • Renesas / Intersil — SPICE models included in their simulation folders.
   • NXP / Philips — Historical models.

2. Conference papers / theses that use CD4051 models:

   • Search IEEE Xplore or Google Scholar for:
     • "CD4051 SPICE simulation"
     • "CMOS analog multiplexer modeling"
     • "Switch-level modeling of CD4051"
   • Example: papers on radiation effects or latch-up in CMOS switches often model CD4000 series including CD4051 (e.g., RADECS, NSREC proceedings).

3. Where to find a verified model (better than a paper):

   • TI product page → "Tools & software" → download PSpice model (CD4051B).
   • GitHub / university course repositories — search CD4051.lib or CD4051 SPICE.

If you specifically need a citation for academic work:

• No standard "CD4051 SPICE model" paper exists. Instead, cite the datasheet (TI, Renesas) and state that the SPICE model was obtained from the manufacturer's design resources.
• If you derived parameters from measurements, you could cite:
  Sedra & Smith, "Microelectronic Circuits" (for CMOS switch modeling principles) + your own characterization.

The CD4051 is a classic CMOS 8-channel analog multiplexer/demultiplexer. Finding an official SPICE model can be tricky because major manufacturers like Texas Instruments

do not provide official SPICE models for parts originating from the older Harris Semiconductor line. TI E2E support forums SPICE Model Resources cd4051 spice model link

While no single "official" download exists, you can obtain functional models through community libraries and third-party archives: LTspice Community Library: LTspice Groups.io forum hosts a file named SwitchAna.lib

which contains subcircuit models for the CD4051, CD4052, and CD4053. Look for the .subckt 4051a

version in this library, as it typically features a more realistic transmission gate (TG) model. Datasheet Archive: Sites like Datasheet Archive

may have legacy SPICE data or ECAD models (symbols and footprints) for specific variants like the CD4051BMT. Alternative Models:

If a CD4051-specific model is unavailable, engineers often use the NXP HEF4051 Manufacturer application notes & simulation model files (not

model as a high-fidelity substitute, as it shares identical logical and electrical characteristics. Implementation Guide

To use the CD4051 in your simulation (specifically LTspice): Locate the Subcircuit: file and find the .subckt 4051 .subckt CD4051 definition. Generate a Symbol: Drag and drop the file into LTspice. Right-click the line and select "Create Symbol."

LTspice will generate a standard box symbol. Note that the pins may be arranged randomly, so you may want to manually edit the symbol for a cleaner schematic. Pinout Verification:

Ensure your model pins match the standard CD4051 hardware pinout: 0–7 (Pins 13, 14, 15, 12, 1, 5, 2, 4). Common Out/In: Address Inputs: A, B, C (Pins 11, 10, 9). cap V sub cap D cap D end-sub cap V sub cap E cap E end-sub cap V sub cap S cap S end-sub subcircuit code block to paste directly into your SPICE netlist? SPICE model for CD4051B? - Logic forum - TI E2E

Finding a reliable SPICE model for the classic CD4051 8-channel analog multiplexer can be surprisingly difficult. Most manufacturers assume you are using the physical chip, leading to sparse support in simulation libraries. Texas Instruments (CD4051B) — PSpice model available in

Here is a solid piece detailing the best available resources, how to use them, and the caveats you must know when simulating this specific component.

🧠 Why the CD4051 Needs a Good SPICE Model

The CD4051 isn’t just a “switch.” It has:

• Non-linear on-resistance (varies with input voltage and supply)
• Charge injection (critical for sample-and-hold circuits)
• Break-before-make switching (to avoid shorting channels)
• Logic-level thresholds (CMOS compatibility)

Without a proper model, your simulation might show perfect switching — while the real board shows signal distortion, crosstalk, or latch-up. Not fun.

3. University and Open-Source Repositories

If vendor links go down (it happens), open-source engineering communities come to the rescue.

• GitHub Search: Use the query: CD4051 SPICE model in GitHub’s search. Look for repositories ending in .lib or .sub. One notable community link is from the "kicad-simulation" or "ltspice-lib" groups.
• Warning: Always verify open-source models against the datasheet for Ron and threshold voltages.

For LTspice (Most Common Workflow)

1. Download the .lib or .sub file from one of the links above.
2. Save it to your project folder (e.g., C:\MySimulations\CD4051\cd4051.lib).
3. Create a symbol: Since LTspice lacks a native CD4051 symbol, you can either:
   • Use a generic X (subcircuit) symbol: Place a component, change its prefix to X, and value to CD4051.
   • Download a pre-made .asy symbol from GitHub.
4. Add the SPICE directive: Click .op icon and type: .inc cd4051.lib
5. Connect pins correctly. Standard subcircuit pinout is typically:
   • Pin 1: Analog input
   • Pin 2-9: Analog outputs (channels)
   • Pin 10: Inhibit
   • Pin 11: VEE
   • Pin 12: GND (VSS)
   • Pin 13: A (LSB)
   • Pin 14: B
   • Pin 15: C (MSB)
   • Pin 16: VDD

In LTSpice (Analog Devices)

1. Download the .LIB or .CIR file from your chosen CD4051 SPICE model link.
2. Place the file in the same folder as your schematic (e.g., CD4051.lib).
3. Use a SPICE directive: .inc CD4051.lib
4. Create a symbol, or place a generic nmos/pmos and rename the value to CD4051.
5. Connect pins: A, B, C (address), INH (inhibit), VDD, VSS, VEE, COM, and outputs Y0-Y7.

Verified CD4051 SPICE Model Links

There is no single "official" link from a monolithic vendor like Texas Instruments or NXP that provides a standalone file download link. Instead, manufacturers embed models within simulation tools or support pages. Below are the most reliable sources for the CD4051 SPICE model.