4-to-16 decoder from two 3-to-8 decoders pdf

Design a 4to16 decoder using two 2to4 decoders and one 3. Now, let us implement the following two higherorder decoders using lowerorder decoders. The m74hc154 is an high speed cmos 4 to 16 line decoder demultiplexer fabricated with silicon gate c2mos technology. I was just wondering, since the previous question required us to construct a 3to8 decoder which i have completed, i thought it would impress my lecturer if i was able to combine 2 3to8 decoders to form a 4to16 decoder. The decoder generates all of the minterms of the n input variables. Commonly available bcdtodecimal decoders include the ttl 7442 or the cmos 4028. The device features three enable inputs e1 and e2 and. Construct a 5to32 decoder using only 2to4 decoders and 3to8 decoders with enable. Decoders can also be programmed in the field with the hunter icdhp handheld programmer, if available. Any pointers on where to go from here are appreciated. The 3 less significant input lines n2, n1, n0 are connected to the data inputs of each decoder the most significant input line n3 is used to select between the two decoder circuits. Hey guys, i got this question about electronicsdecoders etc.

Ic 74hc238 decodes three binary address inputs a0, a1, a2 into eight outputs y0 to y7. Since i am using two 38 decoders to develop a 4to 16 decoder, i want to use 4 inputs out of the two 38 decoders. How to design a 4 to 16 decoder using 3 to 8 decoder. Making a 4 x 16 decoder with 2 3 x 8 decoders all about. A decoder circuit of the higher combination is obtained by adding two or more lower combinational circuits.

Design a 4to16 decoder inputs i0i3, outputs o0o15, no enable, using two 2to4 decoders with enable input and one 3to8 decoder with enable input. Cascading two 3 to 8 decoders to obtain a 4 to 16 decoder. Answer to design a 4to16line decoder with enable using five 2to4line decoders with enable as shown in figure. How can i design a 4to16 decoder using two 3to8 decoders. Design a 32to1 multiplexer using only 8to1 multiplexer. Figure 3 shows two 3to8 line decoders with enable inputs connected to form a 4to16 line decoder. Circuit design of 4 to 16 decoder using 3 to 8 decoder. The sn74lvc1g9 2 line to 4line decoder is designed to be used in highperformance memorydecoding or datarouting applications requiring very short propagation delay times. Decoders a binary code of n bits is capable of representing up to 2n. How to design a 4 to 16 decoder using 3 to 8 decoder elprocus. The device features three enable inputs e1 and e2 and e3. Refer my answer answer to how can i make 4x16 decoder using 2x4. It has three inputs as a, b, and c and eight output from y0 through y7. Jul 04, 2015 this type of decoders is available in ic forms so that 3 to 8, 4 to 16, and 5 to 32 decoders can also be made depends on the application requirement.

This multiple enable function allows easy parallel expansion to a 1of32. You can use additional components if required a a 4to16 line decoder b a 6to64 line decoder. Does that mean that the gs out is redundant for values 07, and. The m74hc154 is an high speed cmos 4 to 16 line decoderdemultiplexer fabricated with silicon gate c2mos technology. The device features two input enable e0 and e1 inputs. Figure 7 shows how decoders with enable inputs can be connected to form a larger decoder. Designing of 3 to 8 line decoder and demultiplexer using ic. For the second experiment two 3 to 8 decoders 74ls8 and two. I think you should use a 2to4 decoder for making enables of your four 3to8 decoders.

Jun 12, 2011 hey guys, i got this question about electronics decoders etc. Figure 3 shows two 3to8line decoders with enable inputs connected to form a 4to16line decoder. The subsequent description is about a 4bit decoder and its truth table. The sn74lvc1g9 2line to 4line decoder is designed to be used in highperformance memorydecoding or datarouting applications requiring very short propagation delay times. Figure 3 4x16 decoder constructed with two 3x8 decoders decoders with enable. So ill use all three of the first and the first of the second, and connect the last two inputs to ground, since they wont be used. So, i chose 2x of 2 to 4 decoder and 1x of 3 to 8 decoder. By adding or gates, we can even retain the enable function. Spring 2011 ece 331 digital system design 12 decoders a decoder has n inputs 2n outputs a decoder selects one of 2 n outputs by decoding the binary value on the n inputs. The bottom decoder outputs are all 0s, and the top eight outputs generate minterms.

These have 3 select inputs, which i would join to the 3 lsbs of the 4 inputs, the same for. Spring 2011 ece 301 digital electronics 9 decoders a decoder has n inputs 2n outputs a decoder selects one of 2 n outputs by decoding the binary value on the n inputs. Design a 4 to 16 line decoder using two 3 to 8 line. The device can be used as a 1to16 demultiplexer by. Spring 2011 ece 331 digital system design 25 priority encoders if more than one input is active, the higherorder input has priority over the lowerorder input. Every output will be low unless e1 and e2 are low and. If you could explain what the output of the gate is that would be helpful too. Use the other 3to8 line decoder to generate the complement of the fourth input line a3 and a. A high on either of the input enables forces the outputs high. In highperformance memory systems, this decoder can be used to minimize the effects of system decoding.

Design a 4to 16 line decoder using two 3 to8 line decoders and 16 2 input and gate. These devices have two decoders with common 2, speed termination effects esd 3500 volts dual 1of 4 decoder demultiplexer, that decoder are high. How to design 5 to 32 decoders using 3 to 8 decoders quora. Homework equations the attempt at a solution truth table. Here a much larger 4 3 data plus 1 enable to 16 line binary decoder has been implemented using two smaller 3to8 decoders. Ic 4 to 16 decoder available at jameco electronics. The encoders and decoders are designed with logic gates such as and gate. Program the station numbers into the decoders, and then write the station number assignments on the label on the decoders. Cascading two 3to8 decoders to obtain a 4to16 decoder.

When w 0, the top decoder is enabled and the other is disabled. Two activelow and one activehigh enable inputs reduce the need for external gates or inverters. How to implement 664 decoder using 4 16 decoder quora how can i design a 4 to 16 decoder using two 3 to 8. You can use additional components if required a a 4 to 16 line decoder b a 6 to 64 line decoder. Epic is a trademark of texas instruments incorporated. How to implement a 4 to 16 decoder using 2 to 4 decoder. The two ics will be attached to the digital trainer according to the schematic diagram designed and since this is a 4 to 16 decoder, 4 inputs will be connected to the switches and 1 output will be connected to a led. Oct 29, 2014 this feature is not available right now. Generally a decoders output code normally has more bits than its input code and practical binary decoder circuits include, 2to4, 3to8 and 4to16 line configurations. The decoder output module has two holes to the right of the programming buttons. The two ics will be attached to the digital trainer according to the schematic diagram designed and since this is a 4to16 decoder, 4 inputs will be connected to the switches and 1 output will be connected to a led. Design a 4to16line decoder with enable using five 2to.

Design a 4to16 decoder using two 2to4 decoders and one. Construct a 3to8 decoder using two 2to4 deocders with enable inputs. But i noticed that the gs output will always be 0 in all cases that any of the switches are toggled. Question on vhdl 3 to 8 decoder using two 2 to 4 d. Msi general description the 74hchct154 are highspeed sigate cmos devices. Use the other 3to8 line decoder to generate the complement of the fourth input line a3 and a buffered copy of a3. There are different types of decoders like 4, 8, and 16 decoders and the truth table of decoder depends upon a particular decoder chosen by the user. The mc14514b and mc14515b are two output options of a 4 to 16. Homework statement how to design a 2 to 4 decoder using 4 to 16 decoder. It decodes four binary weighted address inputs a0 to a3 to sixteen mutually exclusive outputs y0 to y15.

A binary code applied to the four inputs a to d provides a low level at the selected one of sixteen outputs excluding the other fifteen outputs, when both the strobe inputs, g1 and g2, are held low. Help design 4 to 16 decoder with given components physics. For the second experiment, two 3to8 decoders 74ls8 and two 4 input nand gate 74ls20 will be used to construct a 4to16 decoder. Since i am using two 38 decoders to develop a 4to16 decoder, i want to use 4 inputs out of the two 38 decoders. Design a 4 to 16 line decoder using two 3 to 8 line decoders. When two 3 to 8 decoder circuits are combined the enable pin acts as the input for both the decoders. Mar 27, 2009 i have been given the following components to design a 4 to 16 decoder. So, it suffices to implement a 4to16 decoder using basic logic gates this is pretty straightforward. How to implement 664 decoder using 416 decoder quora how can i design a 4to16 decoder using two 3to8. I have been given the following components to design a 4 to 16 decoder.

When enable pin is high at one 3 to 8 decoder circuits then it. Can anyone show me how to make a 4 x 16 decoder from 2 3 x 8 decoders. Im asked to implement a 4 to 16 decoder using 2 to 4 decoder and 3 to 8 decoder. Design a 4 to 16 decoder inputs i0i3, outputs o0o15, no enable, using two 2 to 4 decoders with enable input and one 3 to 8 decoder with enable input. The higher value is encoded on the output a valid indicator, d, is included to indicate whether or not the output is valid. I would solve this problem by using two 74ls8 decoders or equivalent.

Construct a 3 to 8 decoder using two 2 to 4 deocders with enable inputs. N3 selects first decoder when it is low 0 less significant. This shows two 3to8line decoders with enable inputs connected to form a 4to16line decoder. For the second experiment two 3 to 8 decoders 74ls8 and. Answer to design a 4to 16 line decoder using two 3 to8 line decoders and 16 2 input and gate. I need very basic info truth tables and basic gates. Use a 5th decoder to choose the correct one according to the 2 msb inputs. A binary code applied to the four inputs a to d provides a low level at the selected one of sixteen outputs excluding the other fifteen outputs, when. A listing of scillcs product patent coverage may be accessed at.

Competitive prices from the leading 2to4 line decoder demultiplexer decoders encoders distributor. You might need to use additional and gates and inverters. Designing of 3 to 8 line decoder and demultiplexer using. Constructing large decoders from smaller ones with enable decoders with enable inputs can be connected together to form a larger decoder circuit. Use one of the 3to8 line decoders to generate the 8 minterms for 3 of the input lines a0,a1,a2. The 154 can be used as a 1to16 demultiplexer by using. For the second experiment, two 3 to 8 decoders 74ls8 and two 4 input nand gate 74ls20 will be used to construct a 4 to 16 decoder. Homew ork 4 solution ics 151 digital logic design spring 2004 1. Exactly one output will be active for each combination of the inputs. Since i am using two 3 8 decoders to develop a 4 to 16 decoder, i want to use 4 inputs out of the two 3 8 decoders. 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.

Dec 22, 2018 homework statement how to design a 2 to 4 decoder using 4 to 16 decoder. Jun 18, 2011 so, it suffices to implement a 4 to 16 decoder using basic logic gates this is pretty straightforward. I was just wondering, since the previous question required us to construct a 3 to 8 decoder which i have completed, i thought it would impress my lecturer if i was able to combine 2 3 to 8 decoders to form a 4 to 16 decoder. Mc14514b 4bit transparent latch 4to16 line decoder. All decoders have one activelow enable input, activehigh binary code inputs, and activelow outputs. Design a 2 to 4 decoder using 4 to 16 decoder physics forums. In a 3 to 8 decoder, three inputs are decoded into eight outputs. The enable gate has two anded inputs which must be low to enable the outputs. Memory organization and addressing digital logic design a 3to8 decoder using only three 2.