4521

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24-bit asynchronous binary counter with oscillator and res
For the buffer to be used, GND' et input, and one CMOS buffer with separate power supply.
Q0...Q17 outputs are missing. and VCC'must be connected to GND and VCC (optionally using series resistors).
     +---+  +---+            +---+---+
 Q24 |1  +--+ 16| VCC        | A I Y |
 RST |2       15| Q23        +===+===+
GND' |3       14| Q22        | 0 I 0 |
   Y |4       13| Q21        | 1 I 1 |
VCC' |5  4521 12| Q20        +---+---+
   A |6       11| Q19
  X0 |7       10| Q18
 GND |8        9| X1
     +----------+