BUY 74LS390N https://www.utsource.net/itm/p/609149.html

Description: Dual 4-Stage Binary Ripple Counter Features: High Speed Operation Low Power Consumption Input Clamp Diodes Limit High-Speed Termination Effects Outputs Source/Sink 24 mA Fanout of 2 Standard Loads Outputs Directly Interface to CMOS, NMOS and TTL Operating Voltage Range of 3.0 to 6.0 V Low Input Current of 1 μA Max High Noise Immunity Characteristic of CMOS Devices Applications: Frequency Division Clock and Timing Circuits Pulse Generation Data Processing Signal Routing Shift Register Applications (For reference only)