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1$ part is stopping my project!! — Parallax Forums

1$ part is stopping my project!!

NR1XNR1X Posts: 111
edited 2008-08-21 03:44 in General Discussion
I reallllly need help here!! i want to get more I/O from my bs2, but none in my area stocks a 74hc595.. i need to know if there is an equiv. part?? all the stores around here supply nte semis.. the nte part i keep coming up with is nte2053 does anyone know if this will work?? and can i cascade it like the 74hc595?? got the day off and want to get my project moving but this 1 part is between me and my beloved stamp!!!1

Comments

  • JavalinJavalin Posts: 892
    edited 2008-08-15 11:52
    A Similar part is the Microchip mcp23016 which is a sixteen·pin I/O expander.· Its i2c rather than serial but look at in the parallax website on the downloads - and there is a nuts&volts with explaination and example code for it.

    http://www.microchip.com/wwwproducts/Devices.aspx?dDocName=en010412

    ok made it easier for you - n&v article is - http://www.parallax.com/Portals/0/Downloads/docs/cols/nv/vol5/col/nv109.pdf

    J

    Post Edited (Javalin) : 8/15/2008 11:57:37 AM GMT
  • NR1XNR1X Posts: 111
    edited 2008-08-15 12:02
    this would be a great alternative but noone around here has it... was hoping to pick somethin up today...
  • PJAllenPJAllen Banned Posts: 5,065
    edited 2008-08-15 12:05
    The NTE2053 is a CMOS 8−bit successive approximation Analog to Digital converter.

  • LoopyBytelooseLoopyByteloose Posts: 12,537
    edited 2008-08-15 14:22
    Where exactly are you located?
    I am in Taiwan and can locally buy the 74HC595.

    Mouser has it in stock and pretty reasonable about small orders.

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    Tropically, G. Herzog [noparse][[/noparse] 黃鶴 ] in Taiwan
  • NR1XNR1X Posts: 111
    edited 2008-08-15 15:17
    im in ct, usa.. guess ill order a fistfull of the 74hc595s, nte seems to be pretty much useless... stinks that everytime i start a project i have to shelf it because i have to wait for parts!! well probably add this to the list of things that never gets finnished.
    oh well thanks to all those who made suggestions..
  • Phil Pilgrim (PhiPi)Phil Pilgrim (PhiPi) Posts: 23,514
    edited 2008-08-15 15:52
    The 74xx4094 and CD4094 are work-alike (but not pin-compatible) substitutes for the 74xx595. The output drive of the CD4094 is much lower, though.

    Also, the '595 is actually a combination of two parts that you may already have:

    1. 8-bit serial-in-parallel-out shift register (74xx164).

    2. 8-bit clocked register (74xx374) or transparent latch (74xx373).

    I'm sure there are other ways to do what you want with what you have or what's available nearby...

    -Phil

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  • NR1XNR1X Posts: 111
    edited 2008-08-15 17:57
    Thanx Phil, im goin through my pile of stuff now. doesn't look like theres any 4094s here. got this box of ics given to me at the end of a hamfest most of it i have no idea but theres alot of opamps counters flipflops and even a few bcd to 7 seg. decoders.. these things are all in ecg boxes and some in little baggies from rca.. i think its all pretty old stuff but i bet it all works fine.. even found a few optoisolators with darlington array.. pretty cool what you find in some boxes at a hamfest!!
  • Chris SavageChris Savage Parallax Engineering Posts: 14,406
    edited 2008-08-15 19:31
    The cross for NTE for the parts Phil mentioned (at least in the LS family) are just NTE74LS164 and NTE74LS374, just in case it helps.

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    Parallax Tech Support
  • NR1XNR1X Posts: 111
    edited 2008-08-15 19:58
    thank you , im just gonna order the parts and wait. i hope i can remain patiant!! the local places arent that local anyways (1hr drive min) so now to pick some other toys to play with. its kinna stupid to order just a couple of shift registers.. maybe an oem bs2 kit,or a pir sensor or even an lcd display!!!!!! lotsa new things to try
  • VIRANDVIRAND Posts: 656
    edited 2008-08-21 03:38
    BTW, Isn't it possible to make a shift register out of a 74HC373/374/573/574 ? (573/574 have nice pin order).
    I'm almost sure I have seen that done before. Just put all the latches in series and feed the first one.
    If you have a big enough assortment of chips there might be other ways.

    For example, a counter plus an 8-bit addressable latch. (4020/4024/4040/4060 + 4099/74HC259)
  • Phil Pilgrim (PhiPi)Phil Pilgrim (PhiPi) Posts: 23,514
    edited 2008-08-21 03:44
    Interesting point! The '74 parts would work this way; not the '73s, though.

    -Phil

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    'Still some PropSTICK Kit bare PCBs left!
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