INDUSTRIAL ARCHAEOLOGY: 74S04 SCHOTTKY LOGIC
Vložit
- čas přidán 24. 07. 2024
- A look at a family of "high speed" logic used in the late '70s and 80's to design high speed computers. The Schottky transistor allowed much faster gate operation. In this video the 74S04, a hex inverter package, is de-capped and the circuit is analyzed to understand why it runs so quickly.
More details on my blog:
electronupdate.blogspot.com/2... - Věda a technologie
Excellert presentation, if not scary.
Schottky was one of the inventors of the transistor, and a hero of mine.
I always, always learn something from your uploads, really appreciate them, please never stop! Thank you.
I've got one of these 74S04 in a microcomputer from that era.
It's used around the 16MHz crystal to create an oscillator using 3 inverters, with the rest used for related circuits.
nice analysis and great description.
A small tip for LTspice - the blue traces are very hard to see, I usually change the color or at least choose a wider line width under Tools-Control Panel-Waveforms.
im chompin' at the bit for a new electronupdate video!!!!
I'd love to see a comparison to a 74GU04 from Potato Semiconductor. Their logic is designed to run in the GHz range.
Fascinating video!
I've only one complaint, please use a larger size and a better contrasting colour for the lines you draw or when highlighting something. Now it is difficult to notice where you are drawing or highlighting at any given time. Otherwise your videos are excellent source of knowledge. Love from India. 🇮🇳
Appreciated ltspice simulation.
Still have one that self dissembled, by cooking it's lid off. Was the only device to fail on a whole box full of TTL, when the power supply decided to take a holiday, and gave the unregulated 14V rail to the 5V rail. Repair was by replacing every part of the power supply, from the pass transistors to the drivers, zener reference and all the resistors, and then replacing the crowbar circuit that should have blown the fuse, because it had not. Funny enough of 14V it all worked nearly normally.
love these !
Super interesting and informative, thanks!
I still have TTL chips in my parts bins and use 74S04 as needed. Hardly archaeology when parts are still in use and still available to buy in quantities of 1000+ from normal suppliers.
I was thinking the same thing - I've just ordered 5 from China . . . although admittedly, they are to repair some vintage arcade game boards
Great see the designs of the past
Thanks for sharing:-)
Helpful video. I liked it
Makes me feel old! I still think in TTL terms, or the MC equivalent.
Your work is beautiful. Personally I like more odd chips like optocouplers or mems, but regular logic is interesting nonetheless!
thankyou. It was hard to see and follow the cursor on this vid. can you turn on a shadow or larger cursor ?
Where can i send a 1980s Sentinel-C dongle for you to do a vid on. they were the first of the security dongles.
_Beam me up Schottky!_
Not 7nm, that's for sure. 😎
@Neez Duts How far we have come.