CD40109B and Trying to Find and Add This Part

Schematic Library Symbols
1

Hello,

I am new to PCB manufacturing and adding components in KiCAD. Is there a footprint or part for the CD40109B from ti.com?

I have been unable to find it. It is a logic level translator.

Seth

P.S. If I cannot add this part, would anyone know of a good replacement for this part number?

2

Just make a 5 unit symbol (4 buffers and power unit) for it. It’s just a buffer with an enable input so the symbol can be a triangle with an enable input. Will only take you 10 minutes. Good practice making your own symbol. Look at how other buffer symbols are constructed, e.g. 74LS126. Maybe even adapt it.

The footprint will be generic PDIP or (TS)SOP.

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3

Thank you for the data. 74ls126 is something I can look up.

Seth

P.S. PDIP, right.

4

So, can I make squares with pins on it?

Like so:

CD40109B
CD40109B861×639 3.42 KB

That is direct from the ti.com pdf of the part.

5

Why don’t you simply download the Symbol and Footprint from ti ? (Ultralibrarian)

image
image831×571 31 KB

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6

No, you need a five part package.

Note: the 74LS126 is not a replacement for the 40109. It just has a similar use, so you can get an idea of how to draw your symbols.

Look this up on the internet. See IC packages.

It might be an idea to learn a few basics about Schematics and PCBs and then read through https://docs.kicad.org/ before tacking an actual drawing. In particular, the Beginners Guide to Kicad.

7

If you do decide to download the files mentioned by @RaptorUK , you will need somewhere to place them. This FAQ explains the basics for creating Personal Libraries.

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8

You could make a rectangle with pins, but 5 separate units gives you more flexibility in placement of the units. Also even if you go for a single rectangle there is no requirement to place the pins in the same physical positions.

The Ultralibrarian symbol is a single rectangle AFAICT. Be aware that the electrical types of pins in symbols from external libraries are not always correct or the best.

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9

So, just testing libraries and footprints here:

Something like this idea?

New_Part_CD40109B

10

Nice and will do…thank you again.

Seth

@RaptorUK , yeppers, that did it. I have a new CD40901B PDIP for use. Thank you fellows…

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11

@jmk , thank you for the link. That helped.

Seth

12

My thoughts are much as @retiredfeline .

My drawing of this symbol has five parts for flexibility.

ksnip_20250113-213341

13

15 is duped in your design.

14

Woops, I forgot to remove pin 15 when I used U?D as a reference to get the length of pins 1, 16 & 8.

I’ve corrected the image (and my library part).

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15

Your pin numbers and pin names are reversed.

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16

That’s not a symbol.
It’s a drawing of a DIP-16 package. It brings nothing to your schematic.
Do it as @jmk shows.

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