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: Mazurn Kigajin
Country: Australia
Language: English (Spanish)
Genre: Love
Published (Last): 1 January 2011
Pages: 145
PDF File Size: 10.27 Mb
ePub File Size: 10.54 Mb
ISBN: 138-9-71031-598-4
Downloads: 45892
Price: Free* [*Free Regsitration Required]
Uploader: Mauzil

As presetting is synchronous setting up a low.

Search field Part name Part description. High Level Input Current. Synchronous operation is provided by having all flip-flops clocked simultaneously so that the outputs change darasheet with each other when so instructed by the count-enable inputs and internal gating. High Level Output Voltage. The carry look-ahead circuitry provides for cascading counters for.

High Level Output Current. 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.

74LS Datasheet(PDF) – Motorola, Inc

Low Level Input Current. Synchronous operation is provided by having all flip-flops clocked. Functional operation should be restricted to the Recommended Operating Conditions. Data or enable P. Sequence illustrated in waveforms: The high-level overflow ripple carry pulse can be enable successive cascaded stages.

  LTAD SOCCER PDF

High Level Input Voltage. This mode of operation eliminates the output counting spikes that are normally associated with asynchronous ripple clock counters. All diodes are 1N or 1N Low Level Input Voltage. A buffered clock input triggers the four flip-flops on the rising positive- going edge of the clock input wave form.

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. The ripple carry output thus enabled.

Count to thirteen, fourteen, fifteen, zero, one, and two. Data inputs P0, P1, P2, P3.

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

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

Carry Output for n-Bit Cascading. This counter is fully programmable; that is the outputs may be preset to either level. Width of clock pulse. Instrumental in accomplishiing this function are two counter-enable inputs and a ripple carry output. Load, clock or enable T. Hold time at any datadheet. The carry look-ahead circuitry provides for cascading counters for. Maximum Ratings are those values beyond which damage to the device may occur. Not more than one output should be shorted at a time, and the duration should not exceed one second.

  AN INTRODUCTION TO CONVERSATION ANALYSIS LIDDICOAT PDF

Synchronous operation is provided by having all flip-flops clocked datashset so that the outputs change conicident with each other when so instructed by the count-enable 74lls161 and internal gating. Propagation Delay, Clock to Ripple carry. Propagation Delay, Clock load input high to Any Q.

All outputs high V. Output Short Circuit Current. This dataxheet, presettable counter features an internal carry. This mode of operation eliminates the output counting spikes that. This counter is fully programmable; that is the outputs may be. Synchronous 4 Bit Counters; Binary. Preset to binary twelve. Reset outputs to zero.

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

Fairchild Semiconductor

Propagation Delay, Enable T to Ripple carry. The carry look-ahead circuitry provides for cascading counters for n-bit synchronous applications without additional gating. Load, clock or enable T Reset. 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.

Enable P or T. Width of reset pulse. 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. Internal Look-Ahead for Fast Counting. Low Level Output Voltage.