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CMOS 40164?

Discussion in 'Electronic Components' started by Hans Summers, Nov 22, 2004.

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  1. Hans Summers

    Hans Summers Guest

    Was there ever a 40164? I have a circuit diagram showing it as an 8-bit
    shift register, but it is quite possible it was a misprint and it should
    really be the 74HC164 which of course does exist, was a descendent from the
    74164 TTL version, and IS an 8-bit shift register. Though in that case the
    pin descriptions would be incorrect. Does anyone know if there ever was a
    40164, and if so, where a datasheet could be found? Google didn't help with
    this.

    Thanks

    Hans
    http://www.HansSummers.com
     
  2. Mark Zenier

    Mark Zenier Guest

    Well, there was a 40163, a 40174, and a 40194 if you're looking for a single
    character typo. But the '163 is a counter, the '174 a multiple latch,
    and the '194 a bidirectional 4 bit shift register. There's also a
    CD4014 which is an 8 bit shift register.

    The clock is pin 8 on a 74HC164, pin 10 on a 4014.

    Mark Zenier Washington State resident
     
  3. Hans Summers

    Hans Summers Guest

    Thanks Mark. The article in question is:
    http://www.hanssummers.com/radio/huffpuff/library/ttsep00.pdf . It looks
    more and more like a typo or series of typos. The pins assigned to what is
    definitely supposed to be an 8-bit shift register, definitely don't seem
    reasonable for a 74HC164 or anything else. Very strange. I might have to
    hunt for subsequent issues of RadCom magasine and see if corrections were
    mentioned.

    Hans
     
  4. Alan

    Alan Guest

    Philips use to make the 74HC164 - 8 bit shift register. It's in my
    1986 copy of their data handbook.

    Also:
    http://www.standardproducts.philips.com/products/hc/pdf/74hc164.pdf

    Alan


    ++++++++++++++++++++++++++++++++++++++++++
    Jenal Communications
    Manufacturers and Suppliers of HF Selcall
    P O Box 1108, Morley, WA, 6943
    Tel: +61 8 9370 5533 Fax +61 8 9467 6146
    Web Site: http://www.jenal.com
    Contact: http://www.jenal.com/?p=1
    ++++++++++++++++++++++++++++++++++++++++++
     
  5. Alan

    Alan Guest

    I suspect the numbering on the schematic is wrong.

    Pin 8 should be pin 7
    Pin 10 should be pin 8
    pin 9 should be pin 10

    Alan


    ++++++++++++++++++++++++++++++++++++++++++
    Jenal Communications
    Manufacturers and Suppliers of HF Selcall
    P O Box 1108, Morley, WA, 6943
    Tel: +61 8 9370 5533 Fax +61 8 9467 6146
    Web Site: http://www.jenal.com
    Contact: http://www.jenal.com/?p=1
    ++++++++++++++++++++++++++++++++++++++++++
     
  6. Hans Summers

    Hans Summers Guest

    Thanks Alan... in that case one would also need:

    pin 16 should be pin 14

    But also, one would need pin 1 to be connected to VCC not GND, and one would
    also need to tie the reset pin 9 to VCC, which isn't indicated on the
    diagram. It all seems like rather a lot of corrections, had they in fact
    meant the 74HC164.

    Anyway it isn't tremendously important, it's reasonably clear what's going
    on and how to substitute other devices e.g. the 74HC164 or 4517 etc.

    Hans
    http://www.HansSummers.com
     
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