CD4518 consist 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. The counter can be cascaded in the ripple mode by connecting Q4 to the enable input of the subsequent counter while the CLOCK input of the latter is held low. The CD4518 IC can operate on 5V, 10V and 15V and consumes a maximum input current of 1uA when operating at 18V. It can be used in Multistage synchronous counting, multistage ripple counting
- Medium-speed operation - 6-MHz typical clock frequency at 10 V
- Positive- or negative-edge triggering
- Synchronous internal carry propagation
- Standardized, symmetrical output characteristics
- 5-V, 10-V, and 15-V parametric ratings
1× CD4518 - Dual BCD Up Counter IC
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