Synchronous Decade Counter
HD74LS160A
Synchronous Decade Counter (direct clear)
REJ03D0444–0300 Rev.3.00
Jul.15.2005
This synchronous decade cou...
Description
HD74LS160A
Synchronous Decade Counter (direct clear)
REJ03D0444–0300 Rev.3.00
Jul.15.2005
This synchronous decade 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 changes coincident with each other when so instructed by the count-enable inputs and internal gating. This mode is 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 waveform. This counter is fully programmable; that is, the output may be preset to either level. As presetting is synchronous, setting up a low level at the load input disables the counter and causes the outputs to agree with the setup data after the next clock pulse regardless of the levels of the enable inputs. Low-to-high transitions at t...
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