Dual Binary Up-Counter - CD4520

CMOS Dual Binary Up-Counter

CD4520 Dual Binary Up-Counter consists of two identical, internally synchronous 4-stage counters. The counter stages are D-type flip-flops having interchangeable CLOCK and ENABLE lines for incrementing on either the positive-going or negative-going transition. For single-unit operation the ENABLE input is maintained high and the counter advances on each positive-going transition of the CLOCK. The counters are cleared by high levels on their RESET lines.

Description above from Texas Instruments, see product information for more - http://www.ti.com/product/CD4520B