PSpice Digital Logic Library and Qucs-S components

[tomhajjar]

Updated 1/08/25

Major update. The new capabilities of the "SPICE netlist" device which now allows the "Create Library..." Utility to create Libraries with Parameter Passing. All subcircuits have been converted from Spice Library to Spice netlist.

I am slowly adding more "PSpice" digital components as well as clock sources, Bridges, pull-up/down's, resistor termination packs..etc. PSpice digital libraries are based on XPSICE so every device in the various XSPICE projects posted in the Discussions are also applicable for use with the PSpice libraries.

Families included 74LV, 74HC and CD4000. PSpice libraries have large gaps in what's available and some families are spread over multiple files. You have to "Grep" the folder holding the libraries to hopefully find what you need. Some devices can be converted to a different family by changing response times.

PSpice digital components require .Param vcc=xx and set ngbehavior psa. All nodes are "digital" unless a DAC bridge is used or a connection is made to a "analog" device or resistor which initiates an "Auto-Bridge". I made 1/4/8 ADC-DAC Bridges and resistor packs to speed making schematics and add "digital" and "analog" interfaces between component types. There is also "Digital" to "Real" and "Real" to "Analog" Bridges.

Plotting of voltages at "Digital" nodes requires using the "Plot Vs." option. Both "Digital "and "Analog" data can be plotted on the same Graph.

Simulations are faster if minimal Auto-Bridges are initiated but for typical circuits speed isn't an issue. No provision has been made to pass parameters to the PSpice devices. I haven't tried making subcircuits to implement the "LTspice" method of plotting digital timing diagrams. Just using equations as shown in the examples.

Digital_device_projects.zip

[tomhajjar]

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[ra3xdh]

Thanks! I will upload the three libraries (CD4000, 74HC, 74LV) as is. The ICs presented in libraries are the most used in analog circuits design.

[tomhajjar]

I only made partial libraries. There are more device subcircuits I made recently that can be added to them.

The subcircuits can used as-is for now.

[ra3xdh]

The partial digital IC libraries will be better than nothing. I am planning to prepare the release in February. I will upload the existing libraries now. But if you will prepare the extended libraries before the release, I will replace the files.

[tomhajjar]

What do you want to call each Library?

Initially I used Digital_HC.lib, Digital_LV.lib...etc.

Is that acceptable?

[ra3xdh]

Yes, the library names are acceptable.

[ra3xdh]

Libraries uploaded by #1182

[tomhajjar]

Lastly.

Since all these "Digital" Libraries are based on XSPICE, there needs to be either a "Shared" Library containing the Sources, I/O, pull-up/dn..etc OR each Library needs them added.

I could make a new XSPICE "Components" Library containing them.

Holger keeps chastising me I keep conflating my "digital" with my "analog".... ;-)

[ra3xdh]

The better solution will be to add a separate library (For example Digital_AUX or another name ) with pullup/down logic high/low etc. This library will be common for all three libraries.

[tomhajjar]

All the XSPICE devices I made require parameter passing so making Libraries is impossible until Spice Library device gets updated or some automated way to make Libraries is created. There are dozens of new devices subcircuits.

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On Sat, Jan 4, 2025, 11:52 AM Vadim Kuznetsov ***@***.***> wrote: The better solution will be to add a separate library (For example Digital_AUX or another name ) with pullup/down logic high/low etc. This library will be common for all three libraries. — Reply to this email directly, view it on GitHub <#1160 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AYQTCTBZS57V4PJBIVDI2UL2JAGUNAVCNFSM6AAAAABUKM6OJKVHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHMZDKNZRGM2TGOBYHE> . You are receiving this because you authored the thread.Message ID: ***@***.***>

[ra3xdh]

All the XSPICE devices I made require parameter passing

This feature is planned as the part of #944 But it will be implemented later this year. Definitely not in this release cycle.

[ra3xdh]

The #1182 merged and this issue is closed. The #1034 remains open.

[tomhajjar]

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