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Help!! Systron Donner/Motorola Custom IC

Discussion in 'Electronic Components' started by Willco, Nov 6, 2004.

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  1. Willco

    Willco Guest

    I'm looking for a custom IC marked 528 55178 it's used in a motorola
    S1344AAB Frequency Counter/Auto Tune Deviation Meter. The Motorola
    part number is 51-80329A60

    In the early 70's the unit was Manufactured by Systron Donner for
    Motorola. Systron Donner's model number was SLN6407A-75. They also
    manufactured a frequency counter model 6252 that is identical to the
    counter section of the 1344AAB

    The chip is a counter/latch with tri-state outputs. I was able to
    Identify some input ie clock and output enable carry. But the other
    inputs are unknown.

    Willco Electronics
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