Codificador 74148 datasheet pdf

This cycle will repeat itself as long as the transmission enable te or d8d11 is. Both devices have data inputs and outputs which are active at the low logic level. In each o f these cases, no other com ponentso r three ss is used to select the code outputs o f the highestpriority firstlevel encoder w. In some cases, such as this, you will be using the keypad for input to devices which use active low inputs. Revised may 20045post office box 655303 dallas, texas 75265148, ls148 logic diagram positive logic1011 datasheet search, datasheets, datasheet search site for electronic. Revised may 2004 2 post office box 655303 dallas, texas 75265 descriptionordering information these ttl encoders feature priority decoding of the inputs to ensure that only the highestorder data line is. For instance, if you have 16 inputs but your encoder chip only takes 8 or some of these extra pins are what allow these devices to be cascaded. Codificadores y decodificadores ingenieria electronica.

Jun 09, 2015 this feature is not available right now. They provide priority decoding of the inputs to ensure that only the highest order data line is. Lead plastic dip type package that features priority decoding of the inputs to ensure that only the highest. Revised may 20045post office box 655303 dallas, texas 75265148, ls148 logic diagram positive logic1011 datasheet search, datasheets, datasheet search site for electronic components and semiconductors, integrated. Defective products are accepted for exchange within 7days from the date of purchase.

Functional description operation the 212 series of encoders begin a 4word transmission cycle upon receipt of a transmission enable te for the ht12e or d8d11 for the ht12a, active low. According to the 7447 datasheet the 7446a and 7447a ics feature activelow outputs designed for driving commonanode leds or incandescent indicators directly. The 147 and ls147 devices encode nine data lines to fourline 8421 bcd. Check with the manufacturers datasheet for uptodate information. Circuitos combinacionais codificadores e decodificadores. Resources to view pdf documents, you can download adobe acrobat reader. The ls151 can be used as a universal function generator to generate any logic function of four variables. It accepts two 4bit binary words a1a4, b1b4 and a carry input c 0. Nte74148 integrated circuit ttl line to line octal.

Diagrama logico aplicaciones codificador interruptor. Segment identification and resultant displays are shown on a following page. The sn5474ls147 and the sn5474ls148 are priority encoders. The sn5474ls748 is a proprietary motorola part incorporating a builtin deglitcher network which minimizes glitches on the gs output.

This means that you will want a key pressed to give a low sbeet on the corresponding line. These ttl encoders feature priority decoding of the inputs to ensure that only the highestorder data line is. And 8lineto3line priority encoders the sn5474ls147 and the sn5474ls148 are priority encoders. Pdf si4567dy 18jul08 74147 74147 datasheet semiconductor 74147 information 74147. Dm7446a, dm7447a bcd to 7segment decodersdrivers physical dimensions inches millimeters unless otherwise noted 16lead plastic dualinline package pdip, jedec ms001, 0. Multiple 74148s can be cascaded by connecting eo of the high priority chip to ei of the low priority chip see datasheet. Ti, alldatasheet, datasheet, datasheet search site for electronic components and semiconductors, integrated circuits, diodes, triacs, and other semiconductors. Data is maintained by an independent source and accuracy is not guaranteed. All of the circuits have full rippleblanking inputoutput controls and a lamp test input. Ti 10line to 4line and 8line to 3line priority encoders,alldatasheet, datasheet, datasheet search site for electronic components and semiconductors, integrated circuits, diodes, triacs, and other semiconductors.

Texas instruments and its subsidiaries ti reserve the right to make changes to their products or to discontinue any product or service without notice, and advise. Bcd to 7segment decoderdriver the sn5474ls47 are low power schottky bcd to 7segment decoder drivers consisting of nand gates, input buffers and seven andorinvert gates. Ci 74147 codificador com prioridade decimalparabcd observando a tabela verdade mostrada na fig. Codificador 74148 electronica ingenieria electronica. They provide priority decoding of the inputs to ensure that only the highest order data line is encoded. Seven nand gates and one driver are connected in pairs. The device features three enable inputs e1, e2 and e3. The ls147 encodes nine data lines to fourline 8421 bcd. Datasheet texas instruments pdf data sheet free from. They offer active low, high sink current outputs for driving indicators directly. Codificadores e descodificadores linkedin slideshare. Data sheet acquired from harris semiconductor schs102c revised october 2003 the cd40147b cmos encoder features priority encoding of the inputs to ensure that only the highestorder data line. Dm7446a, dm7447a bcd to 7segment decodersdrivers dm7446a, dm7447a bcd to 7segment decodersdrivers general description the dm7446a and dm7447a feature activelow outputs designed for driving commonanode leds or incandescent indicators directly. Revised may 20042post office box 655303 dallas, texas 75265descriptionordering informationthese ttl encoders feature priority decoding of the inputs to ensure that only the highest.

Revised april 2004 post office box 655303 dallas, texas 75265 3 logic diagram positive logic 11 a0 9 1 a1 7 a2 6 gs 14 eo 15 12 2 3 1 4 2 5 5 ei 4 7 3 6 10 0 pin numbers shown are for the d, dw, j, n, ns, and w packages. It provides, in one package, the ability to select one bit of data from up to eight sources. The mc5474f148 provides three bits of binary coded output representing the position of the highest order active input, along with an output indicating. The glitch occurs on the negative going transition of the ei input when data inputs 0 7.