CD4518 Chinese data Decimal synchronous add/subtract counter CD4518 Brief description CD4518 is a dual BCD add counter, which consists of two identical synchronous 4-stage counters. The counter stage is a D-type flip-flop. It has internal exchangeable CP and EN lines for counting up on the rising or falling edge of the clock. In single-unit operation, the EN input remains high and carries on the rising edge of CP. When the CR line is high, the counter is cleared. The counter can be cascaded in pulsating mode, and cascading can be achieved by connecting Q3 to the EN input of the next counter. At the same time, the CP input of the latter remains low. CD4518 provides 4 packaging forms: 16-lead multilayer ceramic dual in-line (D), sealed ceramic dual in-line (J), plastic dual in-line (P) and ceramic chip carrier (C).
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