74LS161 DATASHEET PDF

These synchronous, presettable counters feature an inter- nal carry look-ahead for application in high-speed counting designs. The DM74LSA and. 74LS Synchronous 4-bit Binary Counters. These synchronous, presettable counters feature an internal carry look-ahead for application in high-speed. System Logic Semiconductor 74LS datasheet, Synchronous 4 Bit Counters; Binary/ Direct Reset (3-page), 74LS datasheet, 74LS pdf, 74LS

Propagation Delay, Enable T to Ripple carry. Internal Look-Ahead for Fast Counting. The ripple carry output thus enabled will produce a high-level output pulse with a duration approximately equal to the high level portion of the Q A output.

Propagation Delay, Clock load input high to Any Q. Load, clock or enable T Reset. 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.

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.

A buffered clock input triggers the four flip-flops on the rising positive- going edge of the clock input wave form.

Low Level Output Current. Not more than one output should be shorted at a time, and the duration should not exceed one second. Enable P or T. 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.

Low Level Output Voltage.

Synchronous 4 Bit Counters; Binary. Width of reset pulse. Instrumental in accomplishiing this function are two counter-enable inputs and a ripple carry output. High Level Input Voltage. Propagation Delay, Clock to Ripple carry. Synchronous operation is provided by having all flip-flops clocked. The carry look-ahead circuitry provides for cascading counters for. Sequence illustrated in waveforms: Data inputs P0, Datashfet, P2, P3. This synchronous, presettable counter features an internal carry.

Load, clock or enable T. Functional operation should be restricted to the Recommended Operating Conditions.

Fairchild Semiconductor

The high-level overflow ripple carry pulse can be enable successive cascaded stages. Instrumental in accomplishiing this function are two counter-enable inputs and a ripple carry output. 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. Output Short Circuit Current.

74LS (SLS) PDF技术资料下载 74LS 供应信息 IC Datasheet 数据表 (1/5 页)

This counter is fully programmable; that is the outputs may be. The carry look-ahead circuitry provides for cascading counters for n-bit synchronous applications without additional gating. The ripple carry output thus enabled.

Search field Part name Part description. A buffered clock input triggers the four flip-flops on the rising positive- going edge of the clock input wave form.

Synchronous 4 Bit Counters; Binary, Direct Reset

High Level Output Voltage. All diodes are 1N or 1N Propagation Delay, Clock load input low to Any Q. The ripple carry output thus enabled will produce a high-level output pulse with a duration approximately equal to the high level portion of the Q.

This mode of operation eliminates the output counting spikes that. This mode of operation eliminates the output counting spikes that.

Reset outputs to zero. Carry Output for n-Bit Cascading. This counter is fully programmable; that is the outputs may be. Low Level Input Current.