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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On all other products, production processing does not necessarily include testing of all parameters. Testing and other quality control techniques are used to the extent TI deems necessary to support this warranty. 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 the unwary student.

The 74LS is an eight-bit transparent latch, while the 74LS is an eight-bit edge-triggered latch. TI has taken and continues to take reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on incoming materials and chemicals.

Waveform 2 is for an output with internal conditions such that the output is high except when disabled by the output control. Ordinarily this is a Bad Thing because outputs could drive into each other, but for open collector it’s fine: Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability. 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.

Samples may or may not be available. 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.

These can be used in cases where the final output of a logic function only needs to sink current; a later section will give examples where this can be used. Arquivos Semelhantes Esquema e software de gravador p via porta paralela Customers should obtain the latest relevant information before placing orders and should verify that 74lss541 information is current and complete.

74LS datasheet & applicatoin notes – Datasheet Archive

Datasheeet information provided on this page represents TI’s knowledge and belief as of the date that it is provided. To 744ls541 the risks associated with customer products and applications, customers should provide adequate design and operating safeguards. This family arguably has the widest manufacturer support and range of available line of components. These four-bit counter parts can count up or down. Esquema e software de grava Tri-state outputs allow multiple gates to “take turns” driving an output signal.


74LS | Texas Instruments Distributor | 74LS Inventory

This drawing is subject to change without notice. Body dimensions do not include mold flash or protrusion not to exceed 0, In no event shall TI’s liability arising out of such information exceed the total purchase price of the TI part s at issue in this document sold by TI to Customer on an annual basis. The package thermal impedance is calculated in accordance with JESD The series was very successful and very popular, to the extent that when companies want to manufacture new logic parts with different electrical characteristics, they typically create new families of the very same functions and pin-outs.

Use of such information may require a license from a third party under the patents or other intellectual property of the third party, or a license from TI under the patents or other intellectual property of TI. However, if you were picking a single “best” logic family today it would probably have to be the 74LS00 family.

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The truth tables for the 74LS and 74LS introduce a new symbol, “Z,” which represents the “off” state. Outputs Q0 through Q3 are a binary value, where Q0 is the least signifigant bit and Q3 is most significant.

This package can be hermetically sealed with a metal lid. Along the way I’ll also cover some additional chip characteristics that can be useful in complex designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design. Open collector gates have an interesting property, which is that they can be ANDed together just by wiring several outputs together. This is a modified output circuit within the chip which sinks current to indicate a logic “0,” but turns off to indicate a datashet “1.

The 3-state control gate is a 2-input NOR gate such that, if either output-enable OE1 or OE2 input is high, all eight outputs are in the high-impedance state.

TI’s terms “Lead-Free” or “Pb-Free” mean semiconductor products dattasheet are compatible with the current RoHS requirements for all 6 substances, including the requirement that lead not exceed 0.


Products conform to specifications per the terms of Texas Instruments standard warranty. The five standard two-input logic gates in the 74LS00 family are listed in the table below.

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. The only limitation of the 74LS00 family compared to the family is that the 74LS00 family can only source half as much current.

Microcontrolador Microcontrolador Not recommended for darasheet designs. There are six of these on a single chip.

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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. However part of the current reduction in the 74LS00 family was on inputs, such that a typical 74LS00 family part can drive twenty LS loads that is, one output can fan out to twenty inputs within the 74LS00 family; compare this to the family, which could only drive ten inputs in the same family.

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. This arrangement greatly facilitates printed circuit board layout. When measuring propagation delay items of 3-state outputs, switch S1 is open. As long as other logic determines that no more than one output is driving the same signal at the same time, all is well.

TI and TI suppliers consider certain information to be proprietary, and thus CAS numbers and other limited information may not be available for release. CL includes probe and jig capacitance.

The 74LS dtasheet 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. If all outputs are off, the combination of signals is also off.

All input pulses have the following characteristics: Esquema e software de gravador p via porta paralela – 74ls Alexandre row Enviado por: