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anybody know of an available composite video OSD chip

Discussion in 'Electronic Design' started by [email protected], May 3, 2007.

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  1. Guest

    Hi folks,

    I've looked hi and low (I've worn out my keyboard's G, O, L, E keys)
    and can't seem to find anybody who still manufacturers an On Screen
    Display chip that works with composite video. NEC claims to make a
    couple (uPD6464A and uPD6465) but where the heck can one get small

    I'm not really interested in a solution that is also a microcontroller
    with built-in OSD. Those tend to be pretty expensive (and also hard to
    get samples of) or masked parts (which means you need to buy a whole
    lot of them). And I've seen some pretty slick OSD implementations done
    using PICs and AVRs to do the genlock and video generation, but I'm
    not sure I'll be able to clean that up enough to meet NTSC standards.

    I'm just trying to design a simple board that will plug between a
    composite video color camera and a monitor or VCR and display some
    information on the screen. Volume might be a few hundred to a thousand
    a year. I'd really like to use a chip currently in production, not
    something like the STV5730.

    Thanks for your help,

    Mark Hahn
  2. Talk to Attila at

    He sells a complete unit, but must have a source for the bits.


    Adrian Jansen adrianjansen at internode dot on dot net
    Design Engineer J & K Micro Systems
    Microcomputer solutions for industrial control
    Note reply address is invalid, convert address above to machine form.
  3. Guest

    Look into Averlogic. I've had great trouble getting one of their chips
    (AL250) to work but in theory, they would have what you want.
  4. I am using Philips SAA5246 teletext encoder.
    Dunno if that one is still in production, but many places have it, anyways
    some similar ones should be.
    It requires an external SRAM, but there are versions with internal RAM IIRC.
    You send and read data to it via i2c.
    Full genlock, RGB out, and composite out with BW characters.
    Supports simple graphics.
    If you need drivers I have these (open source).
  5. Ico

    Ico Guest

    Yes, pretty hard to find these days eh ?
    I'm currently using the uPD6467 in a few projects. It's a strange thing
    to program, and the quality is the same as a VCR from the eighties - but
    it does the job if you don't expect too much of it.

    We order from Sascoholz in the Netherlands, they sell small quantaties
    as well.
  6. Guest

    Hey Ico, thanks for the pointer to Sascoholz. They have at least heard
    of the uPD6465 (but I have to beg and plead to get a price quote,

    The uPD6467 looks like its intended for RGB video. Are you using it in
    a composite video application? The data sheets talks about VC1 and VC2
    outputs but I haven't read enough to know if that will work for what I
    want. Are there any app notes for it that you know of? I couldn't find
    anything on the NEC site.


  7. Don McKenzie

    Don McKenzie Guest


    I guess that email address is not valid, as
    atilla AT
    sent you a message and data sheets, redarding being able to assist you.

    Email me, or him direct.


    Don McKenzie
    E-Mail Contact Page:

    Crystal clear, super bright OLED LCD (128x128) for your microcontroller.
    Simple serial RX/TX interface. Many memory sizes.

    No More Damn Spam:
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