This 14-pin DIP chip contains four separate NAND gates that operate according to this truth table:
| Input A | Input B | Output |
|---|---|---|
| 0 | 0 | 1 |
| 0 | 1 | 1 |
| 1 | 0 | 1 |
| 1 | 1 | 0 |
In a nutshell, when both inputs are high, then the result is low, else high - the exact opposite of an AND gate. NAND gates can be used for a variety of use cases, including inverting logic signals, or debouncing mechanical push buttons.
In contrast to simpler NAND gates like the CD4011, the CD4093 contains Schmitt Triggers for handling noisy input signals: if the input signal is not clearly a high or low voltage but rather inbetween, the hysteresis of the Schmitt Trigger prevents unwanted oscillations and keeps the signal stable.
While the added Schmitt Triggers are typically no benefit in digital circuits, they don’t hurt either.
Materials
Comments
Please do leave comments below. I am using utteran.ce, an open-source and ad-free light-weight commenting system.
Here is how your comments are stored
Whenever you leave a comment, a new github issue is created on your behalf.
-
All comments become trackable issues in the Github Issues section, and I (and you) can follow up on them.
-
There is no third-party provider, no disrupting ads, and everything remains transparent inside github.
Github Users Yes, Spammers No
To keep spammers out and comments attributable, all you do is log in using your (free) github account and grant utteranc.es the permission to submit issues on your behalf.
If you don’t have a github account yet, go get yourself one - it’s free and simple.
If for any reason you do not feel comfortable with letting the commenting system submit issues for you, then visit Github Issues directly, i.e. by clicking the red button Submit Issue at the bottom of each page, and submit your issue manually. You control everything.
Discussions
For chit-chat and quick questions, feel free to visit and participate in Discussions. They work much like classic forums or bulletin boards. Just keep in mind: your valued input isn’t equally well trackable there.
(content created Aug 28, 2024)