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MAX3100 substitute??? — Parallax Forums

MAX3100 substitute???

bobhillierbobhillier Posts: 27
edited 2004-11-12 15:30 in BASIC Stamp
Can someone recommend a substitute component for a MAX3100 UART?
Maxim has a 9 week lead time to get these parts and I can't locate a source in Ottawa or via Digikey.

The MAX3100 provides the buffer capacity I think I need for my BS2p24 serial comm project.

Thanks for your suggestions.

Bob

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······ Bob, Ottawa
W75 54 17·· N45 18 30
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Comments

  • Tracy AllenTracy Allen Posts: 6,664
    edited 2004-11-09 03:26
    Hi Bob,

    Digikey does seem to have current stock.

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    Tracy Allen
    www.emesystems.com
  • Bruce BatesBruce Bates Posts: 3,045
    edited 2004-11-09 06:30
    Hi Bob -

    You may find this to be a real helpful search engine for finding chip availability:
    http://www.findchips.com/ . Presently they show a number of resources for the MAX3100.

    Regards,

    Bruce Bates
  • bobhillierbobhillier Posts: 27
    edited 2004-11-09 13:23
    Tracy and Bruce

    I was certain Digikey indicated back order when I inquired last week. Maybe I am getting as old as my kid says I am.

    Thanks for the FindChips link. This will be quite useful in the future.

    Bob

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    ······ Bob, Ottawa
    W75 54 17·· N45 18 30
    ·········· G16 #27
  • allanlane5allanlane5 Posts: 3,815
    edited 2004-11-09 15:54
    www.phanderson.com may have some. He is a professor at a college, and uses them
    with his students.

    Some limitations of the 3100 though:
    1. It *won't* do 'inverted' data -- you must have a max232 driver in there.
    2. It *only* buffers 8-bytes
    3. I think it is pretty limited where number of data bits and parity are concerned.
    4. You *must* have an external crystal on it to set the baud rate.
  • Tracy AllenTracy Allen Posts: 6,664
    edited 2004-11-09 20:24
    There is also the MAX3110, which has the inverters to RS232 levels built in. That is the chip Al described in his write-up. Unfortunately, it is harder to find than the vanilla MAX3100

    I used the MAX3100 initially because one thing it has going for it is IrDA capability.
    www.emesystems.com/BS2IrDA.htm
    Also in its favor is a very good low power mode--The chip can sleep at low power and wake up when there is activity on the serial line. Do be sure you order the correct crystal. It is a weird frequency!

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    Tracy Allen
    www.emesystems.com
  • bobhillierbobhillier Posts: 27
    edited 2004-11-10 13:21
    Thanks Tracey and Al

    It was indeed the MAX3110 I found to have huge lead times. The MAX3100 appears to be easily available.

    I have ordered a MAX3100, a MAX3222 and a crytsal. I expect this will address my serial woes. By the time I get this issue resolved and am ready to build a permanent circuit the MAX3110 will hopefully be available.

    Thanks for the info.

    Bob

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    ······ Bob, Ottawa
    W75 54 17·· N45 18 30
    ·········· G16 #27
  • Bruce BatesBruce Bates Posts: 3,045
    edited 2004-11-10 13:37
    Bob -

    Digi-Key has ample stock for the MAX3110ECWI if that's helpful.

    Regards,

    Bruce Bates
  • bobhillierbobhillier Posts: 27
    edited 2004-11-12 15:30
    Thanks Bruce

    I saw this part but have been scared away by the SO packaging. My solderig skills are good but SO parts (and surface mount) are a significant challenge.

    Are sockets available for SO parts?

    Many thanks...

    Bob

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    ······ Bob, Ottawa
    W75 54 17·· N45 18 30
    ·········· G16 #27
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