HCF4510B

The HCC4510B, HCC4516B (extended temperature range) and the HCF4510B, HCF4516B (intermediate temperature range) are monolithic integrated circuits available in 16-lead dual in-line plastic or ceramic package and plastic micro package. The HCC/HCF4510B Presettable BCD Up/Down Counter and the HCC/HCF4516B Presettable Binary Up/Down Counter consist of four synchronously clocked D-type flip-flops (with a gating structure to provide T-type flip-flop capability) connected as counters. These counters can be cleared by a high level on the RESET line,and can be preset to any binary number present on the jaminputs by ahigh level on thePRESET ENABLE line. TheHCC/HCF4510B will count out of non-BCD counter states in a maximum of two clock pulses in the up mode, and a maximum of four clock pulses in the down mode. If the CARRY-IN input is held low, the counter advances up or down on each positive-going clock transition. Synchronous cascading is accomplished by connecting all clock inputs in parallel and connecting the CARRY-OUT of a less significant stage to the CARRY- IN of a more significant stage. The HCC/HCF4510B and HCC/HCF4516B can be cascaded in the ripple mode by connecting the CARRY- OUT to the clock of the next stage. If the UP/DOWN input changes during a terminal count, the CARRY-OUT must be gated with the clock, and the UP/DOWN input must change while the clock is high. Thismethod provides a clean clock signal tothe subsequent counting stage.