Datasheets for electronic components. This file is the datasheet for the following electronic components: 74LS – ?. Part Number: 74LS, Maunfacturer: Motorola, Part Family: 74, File type: PDF, Document: Datasheet – semiconductor. 74LS datasheet, 74LS circuit, 74LS data sheet: TI – SYNCHRONOUS UP/DOWN COUNTERS WITH DOWN/UP MODE CONTROL,alldatasheet.

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Level changes at the enable input should be made only when the clock in- put is high. Wh en low, the counter counts up and when high, 744ls190 counts down. Information published by Tl regarding third-party products or services does not constitute a license from Tl to use such products or services or a warranty or endorsement thereof.

To test Qq output of ‘ and ‘LS Customers should obtain the latest relevant information before placing orders and should verify that such information is current and complete. Count up to fourteen, fifteen maximumzero, one, and two. Load preset to BCD seven. 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.

Counting o c cu rs on the positive goin g transition of the clock input.

Previous 1 2 Conditions on other inputs are irrelevant. Data inputs A and D are shown by the solid line. Minimum count enable time is the interval immediately preceeding the rising edge of the clock pulse during which interval the count enable input must be low to ensure counting.

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. In the counting modes, state changes are initiated by the rising edge of the.


An asynchronous parallel load input overrides coun ting and loads the data. These counters are fully programmable; that is, the outputs may be preset to either level by placing a low on the load input and entering the desired data at the data inputs.

truth table of 74LS datasheet & applicatoin notes – Datasheet Archive

Pin numbers shown are for D, J, and N packages. I qq is measured with all inputs grounded and all outputs open.

Datasheeet QIC, Mbytetape, circuit diagram Truth Table IC, counter schematic diagram,uses and functions, counter truth table of ic A schematic diagram for the IC of All inputs are equipped w ith.

Count up to eight, nine maximumzero, one, and two. All data inputs are low. Tl assumes no liability for applications assistance or customer product design. Add arrow from 15 to 8. Two outputs have been made available to perform the cascading function: Count down to one, zero minimumfifteen, fourteen, and thirteen. This feature allows the counters to be used as modulo-N dividers by simply modifying the count length with the preset inputs.

The output will change to agree with the data inputs independently of the level of the clock input.

74LS190 Datasheet

State changes of the counters are synchronous with the. Tl is not responsible or liable for such altered documentation. Information of third parties may be subject to additional restrictions.

Data in is shown by the solid line for both devices. The input pulses are supplied by generators having the following characteristics: Data inputs B and C are held at the low logic level. 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.


Buyers acknowledge and agree that any such use of Tl products which Tl has not designated as military-grade is solely at the Buyer’s risk, and that they are solely responsible for compliance with all legal and regulatory requirements in connection with such use. A disadvantage ofdoesn’t apply, because the TC output of a given stage is not affected by its own CE.

This mode of operation eliminates the output counting spikes normally associated with asyn- chronous ripple clock counters. Except where mandated by government requirements, testing of all parameters of each product is not necessarily performed.

Add lo off parameter with lim it of pA max with 15 V. A disadvantage of this configuration, in someoutput of a given stage is not affected by its own CE. Buyers acknowledge and agree that, if they use any non-designated products in automotive applications, Tl will not be responsible for any failure to meet such requirements. For simplication, pulse rise times, reference levels, etc.

Full text of ” IC Datasheet: Tl does not warrant or represent that any license, either express or implied, is granted under any Tl patent right, copyright, mask work right, or other Tl intellectual property right relating to any combination, machine, or process in which Tl products or services are used.

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