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Old IC Datasheet

Discussion in 'Electronic Design' started by [email protected], Jul 26, 2006.

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  1. Guest

    Hey everybody,

    I was wondering if anyone can help me find the datasheet for the
    MCM5003AL (by Motorola) or point me to any place where I might be able
    to find it, whether a book or online or by any other method.

    Thank you
  2. Tilmann Reh

    Tilmann Reh Guest

    According to <>
    this is a 64x8 Bit bipolar PROM in a DIP24 package.

    From the density, this must have been in the 70s... I don't have such
    old memory data books at hand; even my old Fairchild bipolar memory data
    book of 1980 starts with 1Kx8...

    It's also unlikely you'll get anything online. However, maybe you can
    get some information about a pin compatible device of another maker, if
    you just need the pinout details and some basic specs for error tracking.

  3. Guest

    I tried looking for a pin compatible device but unfortunately the
    closest I came to it was the 74S475 which is not exactly pin
    compatible. I just need the pinout of the IC to be able to map it to
    another newer more available one.
  4. Guest

    I got the pinout for the chip from an old version of DATA PAL but some
    of the labels don't make much sense. There's a pin that says "H" and
    it's in the place of the GND so I guess it's a ground. But there are
    two pins that say G2, does anyone have any idea what that means?
  5. Tilmann Reh

    Tilmann Reh Guest

    Look at the circuit the device was in: is that pin connected to ground?
    The label G is often used for global enable lines.

    Maybe that device has several (maybe different) enable (or chip select)
    inputs? (like the 74138, for example - one active low, two active high.)
    You should check where these pins are connected to. Maybe they are
    simply tied to constant voltages (VCC or GND).

  6. Please look at
    Yesterday I asked for the part, today they had it!

  7. Tilmann Reh

    Tilmann Reh Guest

    Wow - that's good service.

    Now it's also clear that G1 and G2 are ground pins, which are also used
    for programming the fuse matrix (at least G2, from the maximum voltages

  8. YD

    YD Guest is the one I most frequently use.

    - YD.
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