74LS163 DATASHEET PDF

These synchronous presettable counters feature an inter- nal carry look-ahead for application in high-speed counting designs The LSA and LSA are. SN74LSADR. SOIC. D. Q1. SN74LSANSR. SO. NS. Q1. Texas Instruments 74LS Counter ICs are available at Mouser Electronics. Mouser offers inventory, pricing, & datasheets for Texas Instruments 74LS

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The function of the counter whether enabled, dis- abled, loading, or counting will be dictated solely by the conditions meeting the stable set-up and hold times. The carry look-ahead circuitry provides for cascading counters for n-bit synchronous applications without addi- tional gating. As presetting is synchronous. Instrumental in accomplishing this function are two count-enable inputs and a ripple carry output.

74LS163 Datasheet PDF

The carry output is decoded by means of a NOR gate, thus preventing spikes during the normal counting mode of operation. Order Number Package Number.

This high-level over- flow ripple carry pulse can be used to enable successive cascaded stages. Synchronous operation is pro- vided by having all flip-flops clocked simultaneously so that the outputs change coincident with each other when so instructed by the count-enable inputs and internal gating.

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The gate output is connected to the clear input to. View PDF for Mobile.

This mode of operation eliminates the output counting spikes which are normally associated with asynchronous ripple clock counters. 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.

74LS163 Datasheet

This synchronous clear allows the count length to be modified easily, as decoding the maximum count desired can be accomplished with one external NAND gate.

The clear function for the. Features s Synchronously programmable s Internal look-ahead for fast counting s Carry output for n-bit cascading s Synchronous counting s Load control line s Diode-clamped inputs s Typical propagation time, 74ls63 to Q output 14 ns s Typical clock frequency 32 MHz s Datssheet power dissipation 93 mW Ordering Code: Instrumental in accomplishing this function.

Fairchild Semiconductor Electronic Components Datasheet. A buffered clock input triggers the. Synchronous operation is pro.

The ripple carry output thus enabled will produce a high. These counters are fully programmable; that is, the outputs. The gate output is connected to the clear input to synchronously clear the counter to all low outputs. 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 input.

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The clear function for the DM74LSA is synchronous; and a low level at the clear inputs sets all four of the flip-flop outputs LOW after the next clock pulse, regardless of the levels of the enable inputs.

These counters feature a fully independent clock circuit. Devices also available in Tape and Reel. The carry output is decoded by means of. Synchronous 4-Bit Binary Counters.

National Semiconductor – datasheet pdf

This mode of operation eliminates the output counting. Changes made to control inputs enable P or T or load that. These counters are fully programmable; that is, the outputs may be preset to either level.

The function of the counter whether enabled, dis. The carry look-ahead circuitry provides for cascading. DM74LSA is synchronous; and a low level at the clear. A buffered clock input triggers the four flip-flops on the rising positive-going edge of the clock input waveform. These synchronous, presettable counters feature an inter.

This synchronous clear allows the count length to. Changes made to control inputs enable P or T or load that will modify the operating mode have no effect until clocking occurs.