We have a probleme with the SN 74HC60.
We use it as a counter. with an rc oscillator. The freq on pin 9 is about 157hz
We have not a good stability on signal on Q4(pin7).
R2=510k on pin 11
R1=270k on pin 10
C=10nF on pin 9
When we use another component (the 74HC4060) ther's no problem with these values.
Is there limits on components R1,R2,C for the SN 74HC60