UKŁAD SCALONY: CD40102BE
CD40102B and CD40103B consist of an 8-stage synchronous down counter with a single output which is active when the internall count is zero. The CD40102B is configured as two cascaded 4-bit DCB counters and the CD40103B contains a single 8-bit binary counter. Each type has control inputs for enabling or disabling the clock, for clearing the counter to its, maximum count, and for presetting the counter either synchronously or asynchronously. All control inputs and the CARRY-OUT / ZERO-DETECT output are active low logic.