Description, Synchronous Up/down Counters WITH Down/up MODE Control. Company, Texas Instruments, Inc. Datasheet, Download datasheet. Quote . Reproduction of TI information in TI data books or data sheets is permissible only if reproduction is without alteration and is accompanied by all associated. datasheet, circuit, data sheet: TI – SYNCHRONOUS UP/ DOWN COUNTERS WITH DOWN/UP MODE CONTROL,alldatasheet, datasheet, .
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Full text of “IC Datasheet: 74LS”
This feature allows the counters to be used as modulo-N dividers by simply modifying the count length with the preset inputs. Data input D is shown by the dashed line. Lqad preset to binary thirteen. Tl warrants performance of its hardware products to the specifications applicable at the time of sale in accordance with Dataseet standard warranty.
This mode of operation eliminates the output counting spikes normally associated with asyn- chronous ripple clock counters. Testing and other quality control techniques are used to the extent Tl deems necessary to support this datashee. The latter output produces a high-level output pulse with a duration approximately equal to one complete cycle of the clock when the counter overflows or underflows.
Level changes at the enable input should be made only when the clock in- put is high. Reproduction of Tl information in Tl data books or data sheets is permissible only if reproduction is without alteration and is accompanied by all associated warranties, conditions, limitations, and notices.
Data inputs A and D are shown by the solid line. Pin numbers shown are for D, J, and N packages. The counters can be easily cascaded by feeding the ripple clock output to the enable input of the succeeding counter if parallel clocking is used, or to the clock input if parallel enabling is used.
Count down to one, zero minimumfifteen, fourteen, and thirteen. Count up to fourteen, fifteen maximumzero, one, and two. SN54′, SN74′ Circuits 5.
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Data inputs A, B, and C are shown by the solid line. All products are sold subject to Tl’s terms and conditions of sale supplied at the time of order acknowledgment. Conditions on other inputs are irrelevant. Except where mandated by government datsheet, testing of all parameters of datqsheet product is not necessarily performed.
The ripple clock output produces a low-level output pulse equal in width to the low- level portion of the clock input when an overflow or underflow condition exists. Synchronous operation is provided by having all flip- flops clocked simultaneously so that the outputs change coincident with each other when so instructed by the steering logic.
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Count up to eight, nine maximumzero, one, and two. Information of third parties may be subject to additional restrictions. The input pulses are supplied by generators having the following characteristics: Load preset to BCD seven. Tl is not responsible or liable for such altered documentation.
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I qq is measured with all inputs grounded and all outputs open. To minimize the risks associated with customer products and applications, customers should datasbeet adequate design and operating safeguards. Two outputs have been made available to perform the cascading function: Customers should obtain the latest relevant information before placing orders and should verify that such information is current and complete. Further, Datasheett must fully indemnify Tl and its representatives against any damages arising out of the use of Tl products in such safety-critical applications.
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74190 Datasheet PDF
All data inputs are low. For simplication, pulse rise times, reference levels, etc. Data in is shown by the solid line for both devices.