Synchronous 4 Bit Counters; Binary, Direct Reset

This synchronous, presettable counter features an internal carry look-ahead for application in high-speed counting designs. Synchronous operation is provided by having all flip-flops clocked simultaneously so that the outputs change conicident with each other when so instructed by the count-enable inputs and internal gating.

This mode of operation eliminates the output counting spikes that are normally associated with asynchronous (ripple clock) counters. A buffered clock input triggers the four flip-flops on the rising (positive-going) edge of the clock input wave form.

? Internal Look-Ahead for Fast Counting

? Carry Output for n-Bit Cascading

? Synchronous Counting

? Synchronously Programmable

? Load Control Line

? Diode-Clamped Inputs