4521 frequency divider
Output Count capacity
Pin10, Q18 dived 0.2262144
by XTAL frequency = 0.065 Second (15.4Hz)
Pin11,
Q19 dived 0.5524288
by XTAL frequency = 0.13 Second (7.6Hz)
Pin12, Q20 dived
1.048576
by XTAL frequency = 0.25 Second (4Hz)
Pin13, Q21 dived 2.097152
by XTAL frequency = 0.5 Second (2Hz)
Pin14, Q22 dived 4.194304
by XTAL frequency = 1
Second (1Hz)
Pin15, Q23 dived 8.388608
by XTAL frequency = 2 Second (0.5Hz)
Pin1, Q24 dived 16.777216
by XTAL frequency = 4 Second (0.25Hz)