Ok, a software-type here with a rather obvious-answer type of question, but being the careful type, I thought I would post it to the forum for some feedback. I am looking for the Eagle library entry for a TEXAS Instruments SN74HC595:
I thought I had found one when I used the SparkFun-DigitalIC library. However when I selected the SOIC-16 package, the product description section changed the "Technologies" field to a value of "74LS595D". Now in looking at that component, it's also a shift register, and I found the diff by a separate search on the forum (thanks!). In looking at it these chips have the same pinouts (although a couple of the pins had slightly different names, they appeared to perform the same function), the same symbols and of course with the SOIC-16 footprint, that wouldn't change between the two (duh).
So the question is: can I use this device from the SparkFun-DigitalIC library for the SN74HC595? The answer seems to be an obvious 'yes', but again, I'm too careful to not at least do a little due diligence before proceeding.
Yes as far as laying out a PCB is concerned these two chips are identical. As are all 74xxYYY chips where xxis the fabrication technology and YYY specifies the function.
av8or1:
Thank you for the education Mike! I had no idea that those part numbers actually meant something.
Yes in you case with 74LS595D the LS means it is fabricated with Low Power Schottky technology and SN74HC595 is High speed CMOS.
The 595 bit says it is a shift register.
Then the SN bit on the front is a manufacturer specific prefix.
