🚀 go-pugleaf

In article <1990Nov21.100446.8944@athena.mit.edu> cabruen@athena.mit.edu (Charles Alan Bruen) writes:
>
>I have received a schematic diagram I am suppose to build.
>However, this was prepared by a now deceased person. One of the
>chips is simply labeled 567. It has 8 input, and the pin 3 has an 
>input from a IR sensor. I have looked in TTL handbooks, and I dont
>believe
>it is one. Does any one else out there have any suggestions. THanks.

I found this in an IC Master.  Hope this helps.

567  Monolithic Tone Decoder

                    _____________ _____________
                   |             U             |
       output  |---|                 __________|---|  
       filter  | 1 |     |\        |/          | 8 | output
               |---|---*-| >-------| npn       |---|
                   |   ^ |/|       |\, arrow   | 
     low-pass  |---|   |   |_________|         |---|
   loop filter | 2 |_  |     ____________      | 7 | ground
               |---| | |____| quadrature |     |---|
                   | |      |   phase    |     |
               |---| |    _\|  detector  |     |---| _____
        input  | 3 |_|___| /|____________|   __| 6 |      |
               |---| |   |   _____|______   |  |---|   timing
                   | |   |_\|phase-locked|__|  |       resistor
               |---| |     /|    loop    |     |---|     and
          -Vcc | 4 | |______|     pll    |_____| 5 |   capacitor
               |---|        |____________|     |---| _____|
                   |___________________________|

Hope this helps.


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