Ampere symbol on 74HC164 datasheet?

Discussion in 'General Electronics Chat' started by dfro, Jul 26, 2010.

  1. dfro

    Thread Starter Active Member

    Feb 6, 2006
    37
    0
    **Edit: the title should say 74HC165, not 74HC164**

    I was reading the datasheet for a Fairchild MM74HC165 shift register IC. And I came across a symbol for expressing the input pin current in amps:

    [Greek alpha]A

    (It looks like '∞' with the right half of the right circle cut off)

    I have not been able to find a reference for what this means.

    Anybody have the answer?

    Thanks,
    Dave
     
  2. Norfindel

    Active Member

    Mar 6, 2008
    235
    9
  3. dfro

    Thread Starter Active Member

    Feb 6, 2006
    37
    0
    Thank you! I agree it must be the pdf viewer.

    I am using the FOSS 'Document Viewer 2.30.3' on an Ubuntu system.
     
  4. bertus

    Administrator

    Apr 5, 2008
    15,647
    2,346
    Hello,

    With Okular on an OpenSuse linux there is also no problem.
    I get a μ symbol at the part you look at:

    [​IMG]

    Bertus
     
  5. tom66

    Senior Member

    May 9, 2009
    2,613
    214
    I've noticed this problem on Ubuntu too, which I use almost all the time. I think it's a font issue, and I haven't found a fix. I just read the (proportional to) symbol as micro. I think ohms might sometimes appear as W, but only occasionally. Again, this is intermittent. Some datasheets make it appear as such and some don't.

    Otherwise, the document viewer is MUCH better than Acrobat... at least it doesn't take 10 minutes to load. :)

    Bertus, I will have a look at Okular, thanks for the suggestion, but I suspect they both use the same backend, libpoppler.
     
  6. dsp_redux

    Active Member

    Apr 11, 2009
    182
    5
    Does "evince" gives you that error too? Mine is working just fine...
     
  7. tom66

    Senior Member

    May 9, 2009
    2,613
    214
    Document Viewer is Evince on Ubuntu.
     
  8. dsp_redux

    Active Member

    Apr 11, 2009
    182
    5
    Thanks for clearing that up for me :)
     
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