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

Author: Yojin Tonos
Country: Latvia
Language: English (Spanish)
Genre: Marketing
Published (Last): 13 January 2004
Pages: 317
PDF File Size: 6.81 Mb
ePub File Size: 10.48 Mb
ISBN: 997-6-57852-780-8
Downloads: 13365
Price: Free* [*Free Regsitration Required]
Uploader: Doshura

Carry Output for n-Bit Cascading.

Search field Part name Part description. Count to thirteen, fourteen, fifteen, zero, one, 74ps161 two. All outputs high V. Low Level Input Current.

Data or enable P. 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.

74LS161 PDF Datasheet浏览和下载

The high-level overflow ripple carry pulse can be enable successive cascaded stages. This counter is fully programmable; that is the outputs may be preset to either level.

This counter is fully programmable; that is the outputs may be.

Instrumental in accomplishiing this function are two counter-enable inputs and a ripple carry output. Propagation Delay, Reset to Any Q. Load, clock or enable T.

Enable P or T. High Level Input Current. Propagation Delay, Enable T to Ripple carry. 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. Propagation Delay, Clock load input low to Any Q. Hold datzsheet at any input. 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.

  DELIA PLATURA PDF

This mode of operation eliminates the output counting spikes that. Load, clock or enable T Reset. A buffered clock input triggers the four flip-flops on the rising positive- going edge of the clock input 74ps161 form. Maximum Ratings are those values beyond which damage to the device may occur.

Width of clock pulse. All diodes are 1N or 1N This counter is fully programmable; that is the outputs may be. 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. Instrumental in accomplishiing this function are two counter-enable inputs and a ripple carry output. The ripple carry output thus enabled will produce a high-level output pulse with a duration 74la161 equal to the high level portion of the Q A output.

Preset to binary twelve. The carry look-ahead circuitry provides for cascading counters for.

  IAN FRESHNEY CULTURE OF ANIMAL CELLS PDF

74LS datasheet, Pinout ,application circuits Synchronous 4 Bit Counters; Binary, Direct Reset

Low Level Output Voltage. Output Short Circuit Current. Not more than one output should be shorted at a time, and the duration should not exceed one second. 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 Level Input Voltage. Reset outputs to zero. This mode of operation eliminates the output counting spikes that.

Internal Look-Ahead for Fast Counting.

Propagation Delay, Clock load input high to Any Q. Synchronous 4 Bit Counters; Binary. A buffered clock input triggers the four flip-flops on the datxsheet positive- going edge of the clock input wave form. The ripple carry output thus enabled. Width of reset pulse. This synchronous, presettable counter features an internal carry. High Level Output Current. High Level Output Voltage. Data inputs P0, P1, P2, P3.