The 4026 Decade counter is a counter and display driver all in one chip. The counter is a decade counter which means that it counts from 0 to 9 and then starts again. Internal logic converts the count to the seven outputs (a - g) necessary to drive a 7-segment display. The outputs can provide a few mA of current, enough to directly drive a small 7-segment LED display.
Box: Logic Ics 3