SN74HC161PWT Datasheet PDF - TI

●description

●These synchronous, presettable counters feature an internal carry look-ahead for application in high-speed counting designs. The ’HC161 devices are 4-bit binary counters. Synchronous operation is provided by having all flip-flops clocked simultaneously so that the outputs change coincident with each other when so instructed by the count-enable (ENP, ENT) inputs and internal gating. This mode of operation eliminates the output counting spikes that are normally associated with synchronous (ripple-clock) counters. A buffered clock (CLK) input triggers the four flip-flops on the rising (positive-going) edge of the clock waveform.

●Wide Operating Voltage Range of 2 V to 6 V

●Outputs Can Drive Up To 10 LSTTL Loads

●Low Power Consumption, 80-µA Max ICC

●Typical tpd = 14 ns

●±4-mA Output Drive at 5 V

●Low Input Current of 1 µA Max

●Internal Look-Ahead for Fast Counting

●Carry Output for n-Bit Cascading

●Synchronous Counting

●Synchronously Programmable