Circuito decodificador 74139 pdf

All of the circuits have full rippleblanking inputoutput controls and a lamp test input. Decodificadores decodificadores decodificadores geco usb. Circuito codificador 74c922 teclado microcontrolador. Each decoder has an active low enable input which can be used as a data input for a 4output demultiplexer. Interruptores na, entradas altas, salida bcd 0000 con inversores. Dual 1of4 decoder demultiplexer the lsttlmsi sn5474ls9 is a high speed dual 1of4 decoderdemultiplexer. Tendo a logica do circuito, ou seja, os estados da saida em funcao da entrada. Multiplexer mux select one input from the multiple inputs and forwarded to output line through selection line. According to the 7447 datasheet the 7446a and 7447a ics feature activelow outputs designed for driving commonanode leds or incandescent indicators directly. The device has two independent decoders, each accepting two inputs and. Segment identification and resultant displays are shown on a following page.

Diagrama logico aplicaciones codificador interruptor. A implementacao deste circuito pode ser feita facilmente com portas logicas conforme mostra a figura 7. This device is ideally suited for high speed bipolar memory chip select address decoding. The dm74150 has a strobe input which must be at a low logic level to enable these devices. Dm74150 data selectorsmultiplexers jameco electronics. Static characteristics voltages are referenced to gnd ground 0 v symbol parameter conditions 74hc9 74hct9 unit min typ max min typ max. Dm74150 data selectorsmultiplexers dm74150 data selectorsmultiplexers general description these data selectorsmultiplexers contain full onchip decoding to select the desired data source. Technical information fairchild semiconductor 74ls9 datasheet. The device has two independent decoders, each accepting two inputs and providing four mutually exclusive active low outputs. Fairchild decoderdemultiplexer,alldatasheet, datasheet, datasheet search site for electronic. All of these decodersdemultiplexers feature fully buffered inputs, presenting only one normalized load to its driving circuit.