74LS161 DATASHEET PDF

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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

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All diodes are 1N or 1N Hold time at any input. Load, clock or enable T Daatasheet. The ripple carry output thus enabled. The carry look-ahead circuitry provides for cascading counters for. This counter is fully programmable; that is the outputs may be. Maximum Ratings are those values beyond which damage to the device may occur. This counter is fully programmable; that is the outputs may be.

The carry look-ahead circuitry provides for cascading dataeheet for. Load, clock or enable T.

Low Level Input Current. Instrumental in accomplishiing this function are two counter-enable inputs and a ripple carry output. Propagation Delay, Reset to Any Catasheet. This synchronous, presettable counter features an internal carry.

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. Data inputs P0, P1, P2, P3.

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Synchronous operation is provided by having all flip-flops clocked. Low Level Output Current. Count to thirteen, fourteen, fifteen, zero, one, and two. Functional operation datashewt be restricted to the Recommended Operating Conditions.

Low Level Input Voltage. Reset outputs to zero.

Not more than one output should be datashset at a time, and the duration should not exceed one second. Internal Look-Ahead for Fast Counting.

Propagation Delay, Clock load input low to Any Q. Low Level Output Voltage. All outputs high V.

74LS161 PDF Datasheet浏览和下载

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.

This counter is fully programmable; that is the outputs may be preset to either level. High Level Output Voltage. This mode of operation eliminates the output counting spikes that. This mode of operation datasbeet the output counting spikes that are normally associated with asynchronous ripple clock counters. Width of reset pulse.

74LS (SLS) – Synchronous 4 Bit Counters; Binary, Direct Reset | eet

Propagation Delay, Clock to Ripple carry. Propagation Delay, Enable T to Ripple carry. High Level Input Voltage. This mode of operation eliminates the output counting spikes that.

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Carry Output for n-Bit Cascading. A buffered clock input triggers the four flip-flops on 74ks161 rising positive- going edge of the clock input wave form. Instrumental in datasbeet this function are two counter-enable inputs and a ripple carry output. As presetting is synchronous setting up a low. High Level Output Current.

The high-level overflow ripple carry pulse can be enable successive cascaded stages. This synchronous, presettable counter features an internal carry.

74LS Datasheet(PDF) – Fairchild Semiconductor

Synchronous 4 Bit Counters; Binary. Search field Part name Part description. High Level Input Current. Datahseet to binary twelve. 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.

Fairchild Semiconductor

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. The ripple carry output thus enabled will produce a high-level datasheeet pulse with a duration approximately equal to the high level portion of the Q. The carry look-ahead circuitry provides for cascading counters for n-bit synchronous applications without additional gating.

Sequence illustrated in waveforms: