3 to 8 74138 decoder pdf

The lsttlmsi sn5474ls8 is a high speed 1of8 decoder demultiplexer. Soj small outline jlead package, three 74fct244a buffers, one 748 decoder and fortytwo 0. The decoder accepts three binary weighted inputs a0, a1, a2 and when enabled provides eight mutually exclusive active. The chip is designed for decoding or demultiplexing applications and comes with 3 inputs to 8 output setup. Figure 1 shows how a 3 to 8 line decoder 748 can be used in conjunction with nand gate 743 to connect a set of switches to the data bus of a microprocessor system via buffers 74367. Designing of 3 to 8 line decoder and demultiplexer using ic. Mar 26, 2018 this feature is not available right now. Datasheet search engine for electronic components and semiconductors. At the entrance receives a 3bit number which multiplexes on an 8bit number the 7segment display. Aug 18, 2019 74ls8, 3to8 decoder demultiplexer 748. The 238 decoder in my case the 74hc238n uses 3 selector inputs called a0, a1 and a2 which together can make 8 possible combinations 238 and thus has 8 outputs 0,1,2,3,4,5,6 and 7. The moisture sensitivity level rating according to the jedec industry standard classifications, and peak solder temperature.

In this project, we will show how a 74hc238 decoder works and how it can be controlled with an arduino microcontroller. If enable input g1 is held low or either g2a or g2b is held high, the decoding function is inhibited and all the 8 outputs go high. Submitted by admin on 26 october in highperformance memory systems, these decoders can be used to minimize the effects of system decoding. How to connect a 74hc238 3to8 decoder to an arduino. Since there are 8 outputs on the 74hc238 chip, we will attach 8 leds to the chip. Jan 22, 2019 74ls8, 3to8 decoder demultiplexer 748. Decodificador 748 pdf 74ls, 74ls datasheet, 74ls pdf, buy 74ls, 74ls 3 to 8 decoder.

The multiple input enables allow parallel expansion to a 1of24 decoder using just three ls8 devices or to a 1of32 decoder using four ls8s and. The748 is a commercially available msi 3 to 8 decoder. But feel free to add 3 additional leds if you want to. The lines of address ranging from a9 to a0 selects a. The setup of this ic is accessible with 3inputs to 8output setup. How can we implement a full adder using decoder and nand. Answer the following questions relating to the diagram. The ic 74ls8 is a 3 to 8 line decoder integrated circuit from the 74xx family of transistortransistorlogicgates. Two active low and one active high enables g1, g2a and g2b are provided to ease the cascading decoders. The lsttlmsi sn5474ls8 is a high speed 1of 8 decoder demultiplexer.

Dm74ls9 decoderdemultiplexer 74ls8 74ls8smd 74ls9 decoderdemultiplexer general description these schottkyclamped circuits are designed to be used in highperformance memorydecoding or datarouting. You would need to connect first 3 data lines in parellel to the two decoder ics, then use the remaining high bit as an enable to the. This means that the effective system delay introduced by the schottkyclamped system decoder is negligible. Data transmission systems s dm74ls8 3to8line decoders incorporates 3 enable inputs to simplify cascading andor data reception. The sn74ls8n is a 3line to 8line decoderdemultiplexer, schottkyclamped ttl msi circuit is designed to be used in highperformance memory decoding or datarouting applications requiring very short propagation delay times. In highperformance memory systems these decoders can be used to minimize effects of system decoding. In high performance memory systems these decoders can be used to minimize the effects of system decoding. Features demultiplexing capability multiple input enable. In highperformance memory systems these decoders can be used to minimize the effects of system decoding. The absolute maximum ratings are those values beyond whichthe safety of the device cannot be guaranteed. The setup of this ic is accessible with 3 inputs to 8 output setup. In highperformance memory systems, this decoder can be used to minimize the effects of system decoding. May 11, 2020 74ls hd74lsp 3 to 8 decoder demultiplexer warefab darasheet line datashset can be implemented without external inverters and a line decoder requires only one inverter. Symbolname and function datasheet search, datasheets, datasheet search site for electronic components and semiconductors, integrated circuits, diodes and other semiconductors.

This product is retired and we wont sell it anymore. The device features three enable inputs e1 and e2 and e3. This decoder circuit gives 8 logic outputs for 3 inputs and has a enable pin. If the device is enabled these inputs determine which one of the eight normally high outputs will go low. Gnd 16 15 14 12 11 10 9 1 2 3 4 5 6 7 8 vcc select data outputs 748. Inclass activity748 octal decoder design a circuit based on a 748 3lineto8line decoder that will output a high whenever the 3bit binary input is greater than 4. Retired 74ls8 ic, 3 to 8 decoderdemultiplexer, dil. The parametric values defined in the electricalcharacteristics tables are not guaranteed at the absolute maximum ratings. Competitive prices from the leading 3 to 8 line decoder demultiplexer 74lvc8 decoders encoders distributor. The sn74ls8n is a 3 line to 8 line decoder demultiplexer, schottkyclamped ttl msi circuit is designed to be used in highperformance memory decoding or datarouting applications requiring very short propagation delay times.

I want to drive a three speed fan which has a simple switched selector converted to ssrs. The chip 748 gets selected when e 1 turns to 0, and e 2 is equal to 0, and e 3 is 1. In my tutorial i only use 5 of the outputs to turn onoff 5 leds. Each decoder has an active low enable input which can be used as a data input for a 4output demultiplexer.

Here eprom7 gets selected when 748 is selected and the address a 12 a 11 a 10 turns to 1 1 1. Every output will be low unless e1 and e2 are low and. The device features three enable inputs e1, e2 and e3. All inputs are equipped with protection circuits against static discharge and transient excess voltage. In highperformance memory systems these decoders can. Data is maintained by an independent source and accuracy is not guaranteed. Input clamping diodes are provided on these circuits to minimize transmissionline effects and simplify system design. Dual 1of4 decoder demultiplexer the lsttlmsi sn5474ls9 is a high speed dual 1of4 decoderdemultiplexer.

When the binary input is less than or equal to 4, it will output a low. Dynamic characteristics 1 all typical values are measured at tamb 25c. Dual 2to4line decoder dual 1to4line demultiplexer 3to8line decoder. Check with the manufacturers datasheet for uptodate information. It takes 3 binary inputs and activates one of the eight outputs. Snx4hc8 3line to 8line decodersdemultiplexers datasheet. September 19933philips semiconductorsproduct speci. Dm74ls8 3 to 8 line decoders incorporates 3 enable inputs to simplify cascading andor data reception dm74ls9 contains two fully independent 2 to 4line decodersdemultiplexers schottky clamped for high performance typical propagation delay 3 levels of logic dm74ls8 21 ns dm74ls9 21 ns typical power dissipation dm74ls8 32 mw. Addendumpage 3 orderable device status 1 package type package drawing pins package qty eco plan 2 leadball finish 6 msl peak temp 3 op temp c device marking 45 samples 30701sea m3851030701sfa active cfp w 16 1 tbd call ti n a for pkg type 55 to 125 jm38510 30701sfa. This device is ideally suited for high speed bipolar memory chip select address decoding.

Feb 28, 2019 the chip 748 gets selected when e 1 turns to 0, and e 2 is equal to 0, and e 3 is 1. The circuit is designed with and and nand logic gates. The chip is designed for decoding or demultiplexing applications and comes with 3. This ic is mainly used in applications like memory decoding with high. Check with the manufacturers datasheet for up to date information. A0, a1, a2 and when enabled provides eight mutually exclusive active low outputs o0.

The main function of this ic is to decode otherwise demultiplex the applications. Designing of 3 to 8 line decoder and demultiplexer using. The device has two independent decoders, each accepting two inputs and providing four mutually exclusive active low outputs. Three enable inputs are provided to ease cascade connection and application of address decoders for memory systems. Decoder demultiplexer, hc family, 1 gate, 3 input, 8 output, 5. Jun 22, 2019 decodificador 748 pdf 74ls, 74ls datasheet, 74ls pdf, buy 74ls, 74ls 3 to 8 decoder. Competitive prices from the leading 3to8 line decoder demultiplexer decoders encoders distributor. Using 3 pins, called the address pins, we can create a total of 8 different outputs. The design is also made for the chip to be used in highperformance memorydecoding or datarouting applications, requiring very short propagation delay ti.