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74Gxx GHz chips -or- What has potatohead been up to??? — Parallax Forums

74Gxx GHz chips -or- What has potatohead been up to???

Just found this...

74Gxx GHz chips

Comments

  • jmgjmg Posts: 15,145
    Cluso99 wrote: »
    Just found this...
    74Gxx GHz chips..
    Hmm, wow...
    Data sheets are all old, and frustratingly vague, but they do seem to offer parts at US$3 for most anything.
    Tag says they have sold 51 x 74112 and 2168 x 7474, 57 x 74U04, 173 x 7414

    Only one part has explicit Crystal connections, but they have app notes for others 'pressed into service' as Crystal Oscillators.

    Missing are any MSI parts like Crystal Oscillator/(Differential In?)/Divider aka a 'faster 74LV4060'.

    Meanwhile, you can use Si5351A type parts, to Synthesize up to 200MHz for under $1

  • Cluso99Cluso99 Posts: 18,069
    jmg wrote: »
    Cluso99 wrote: »
    Just found this...
    74Gxx GHz chips..
    Hmm, wow...
    Data sheets are all old, and frustratingly vague, but they do seem to offer parts at US$3 for most anything.
    Tag says they have sold 51 x 74112 and 2168 x 7474, 57 x 74U04, 173 x 7414

    Only one part has explicit Crystal connections, but they have app notes for others 'pressed into service' as Crystal Oscillators.

    Missing are any MSI parts like Crystal Oscillator/(Differential In?)/Divider aka a 'faster 74LV4060'.

    Meanwhile, you can use Si5351A type parts, to Synthesize up to 200MHz for under $1
    I was kinda surprised they made the 74G373/374 and not the better 74G573/574 pinout version.

    There is no 74G161 counter (for the Program Counter with parallel load for jumping) and 74G181 /74G283 ALU. Hve to make them from flipflops and gates :(
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