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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74LS Datasheet(PDF) – Fairchild Semiconductor
This mode of operation eliminates the output counting spikes which are normally associated with asynchronous ripple clock counters. This high-level over- flow ripple carry pulse can be used to enable successive cascaded stages. Devices also available in Tape and Reel. DM74LSA is synchronous; and a low level at the clear. The clear function for the. Synchronous operation is pro. These counters feature a fully independent clock circuit. View PDF for Mobile. 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 Dztasheet A output.
74LS163 Datasheet PDF
Synchronous 4-Bit Binary Counters. The gate output is connected to the clear input to synchronously clear the counter to all low outputs.
These counters are fully programmable; that is, the outputs. The carry look-ahead circuitry provides for cascading.
74LS Datasheet(PDF) – Hitachi Semiconductor
The function of the counter whether enabled, dis. These synchronous, presettable counters feature an inter.
A buffered clock input triggers the. Instrumental in accomplishing this function are two count-enable inputs and a ripple carry output. The carry xatasheet is decoded by means of.
A buffered clock input triggers the four flip-flops on the rising positive-going edge of the clock input waveform. The carry look-ahead circuitry provides for cascading counters for n-bit synchronous applications without addi- tional gating.
This synchronous clear allows the count length to. Features s Synchronously programmable s Internal look-ahead for fast counting s Carry output for n-bit cascading s Synchronous counting s Load control datasbeet s Diode-clamped inputs s Typical propagation time, clock to Q output 14 ns s Typical clock frequency 32 MHz s Typical power dissipation 93 mW Datawheet Code: 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 ripple carry output thus enabled will produce a high. Changes made to control inputs enable P or T or load that will modify the operating mode have no effect until clocking occurs.
The carry output is decoded by means of a NOR gate, thus preventing spikes during the normal counting mode datashet operation. 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.
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 dagasheet of the enable input. As presetting is synchronous.
This mode of operation eliminates the output counting. Instrumental in accomplishing this function. These counters are fully programmable; datwsheet is, the outputs may be preset to either level. Fairchild Semiconductor Electronic Components Datasheet. The clear function for the DM74LSA is synchronous; and a low level at the clear inputs sets all four of the 74ls16 outputs LOW after the next clock pulse, regardless of the levels of dztasheet enable inputs.
Changes made to control inputs enable P or T or load that. The clear function for the DM74LSA is asynchro- nous; and a low level at the clear input sets all four of the flip-flop outputs LOW, regardless of the levels of clock, load, or enable inputs. 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.
Order Number Package Number. The gate output is connected to the clear input to.