BUY 7490 https://www.utsource.net/itm/p/1859879.html
Package Contains a Divide-by-Two and a Divide-by-Five Counter
Package Type: DIP (Dual In-line Package) Description: The 7490 is a decade counter integrated circuit (IC). Features: High speed operation Low power consumption High noise immunity Low propagation delay High output drive capability High input impedance High noise immunity TTL compatible inputs Outputs can be used as inputs Outputs can be used as open-collector outputs Applications: Frequency division Digital clocks Frequency measurement Pulse generation Event counters Timing circuits Pulse width modulation (For reference only)