The SN54/ 74LS and SN54 / 74LS are octal buffers and line drivers with the same functions as the LS and LS, but with pinouts on the opposite. Texas Instruments 74LS Buffers & Line Drivers are available at Mouser Electronics. Mouser offers inventory, pricing, & datasheets for Texas Instruments . 74LS datasheet, 74LS circuit, 74LS data sheet: ONSEMI – OCTAL BUFFER/LINE DRIVER WITH 3-STATE OUTPUTS,alldatasheet, datasheet.

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Schematics and Components Previous: TI bases its knowledge and belief on information provided by third parties, and makes no representation or warranty as to the accuracy of such information. The 74LS00 family improves technically on the family in two key areas: Microcontrolador Microcontrolador There is a CLR input to reset the counter to Esquema e software de gra To minimize the risks associated with customer products and applications, customers should provide adequate design and operating safeguards.

Since open collector is often used where “0” is the active state, this is also called a “wired-OR” connection, referring to an active-low OR function. Ordinarily this is a Bad Thing because outputs could drive into each other, but for open collector it’s fine: The terminals are gold plated.

On all other products, production processing does not necessarily include testing of all parameters. Products conform to specifications per the terms of Texas Instruments standard warranty.

When measuring propagation delay items of 3-state outputs, switch S1 is open. This family arguably has the widest manufacturer support and range of available line of 74ls54.

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Testing and other quality control techniques are used to the extent TI deems necessary to support this warranty. The 74LS00 family We’ve already spent time looking at the TTL logic family, even though I only introduced the first part in the family.

The correct term for this is “high-impedance,” often shortened to “high-Z. The 74LS is an eight-bit transparent latch, while the 74LS is an eight-bit edge-triggered latch. This section introduces a number of useful digital logic chips for use in a variety of projects.


TI has announced that the device will be discontinued, and a lifetime-buy period is in effect. For a long time, the original series was the best choice as a general-purpose logic family, and the family had more members than any of the offshoot families. Esquema e software de gravador p via porta paralela This arrangement greatly facilitates printed circuit board layout.

Tags Esquema e software de Customers are responsible for their products and applications using TI components. Except where mandated by government requirements, testing of all parameters of each product is not necessarily performed. These four-bit counter parts can count up or down. Although less common, there are decimal versions of these chips. Waveform 2 is for an output with internal conditions such that the output is high except when disabled by the output control.

You might signal a logic function to drive its output high or low as the function may determineand then later tell that function to turn off its output so that a different function may drive the signal instead. Since a regular TTL logic gate sources current for “1” and sinks current for “0,” a signal where neither of these is happening the signal is “off,” like in open collector outputs can actually be thought of as being a third state.

Esquema e software de gravador p via porta paralela – 74ls Alexandre row Enviado por: Information published by TI regarding third-party products or services does not constitute a license from TI to use such products or services or a warranty or endorsement thereof. Important Information and Disclaimer: The information provided on this page represents TI’s knowledge and belief as of the date that it is provided.

74LS Datasheet PDF – Texas Instruments

The 74LS is identical to the 74LS except it only counts from 0 through 9 through binary ; the 74LS is similarly identical to the 74LS except for the limited range. The only limitation of the 74LS00 family compared to the family is that the 74LS00 family can only source half as much 74ps541. TI has taken and continues to take reasonable steps to provide representative and accurate information but may not have datashet destructive testing or chemical analysis 74ls514 incoming materials and chemicals.


Parts which are capable of having their output in any of these three states are considered to have “tri-state” outputs. Tri-state outputs allow multiple gates to “take turns” driving an output signal. Because tri-state buffers have many applications in microprocessor circuits, there are several useful chips available which are designed to function on eight data signals bits at one time.

Arquivos Semelhantes Esquema e software de gravador p via porta paralela Texas Instruments Incorporated and its subsidiaries TI reserve the right to make corrections, modifications, enhancements, improvements, and other changes to its products and services at any time and to discontinue any product or service without notice. Esquema e software de grava 74l5s41 all outputs are off, the combination of signals is also off.

Device is in production to support existing customers, but TI does not recommend using this part in a new design. Many of the basic logic functions are also available in parts with “open collector” outputs.

Not recommended for new designs. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.

74LS Datasheet Texas Instruments pdf data sheet FREE from

TI’s terms “Lead-Free” or “Pb-Free” mean semiconductor products that are compatible with the current RoHS requirements for all 6 substances, including the requirement that lead not exceed 0. This method of combining multiple outputs on the same signal path is used heavily in microprocessor circuits, where several different memory or input circuits may be sharing a common set of data signals.

There are plenty of other useful chips in the 74LS00 logic family, but these are some of the most useful building blocks. The eight-bit buffers 74LS and 74LS are functionally equivalent to the widely used 74LS and 74LS; however the ‘ and ‘ have a more confusing pin-out to trip dagasheet unwary student.

Production processing does not necessarily include testing of all parameters.