4 16 decoder using two 3-8 decoders pdf

When enable pin is high at one 3 to 8 decoder circuits then it. 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. How to build a 4x16 decoder using 3x8 decoders duration. What i did, i used 2x of 2 to 4 decoder and 1x 3to8 decoder. Homework statement how to design a 2 to 4 decoder using 4 to 16 decoder. The device features two input enable e0 and e1 inputs. The 2 4low power decoder and 2 4 low power inverting decoder schematics are shown in fig. For the two decoders out there given the same input with enables inverted,this simply means one of 3 to 8 decoder will be provided with a enable and the other will. A vhdl program for 64 to 1 multiplexer using four 4 to 1 multiplexers is not possible, as four 4 to 1 multiplexers provide only 16 inputs, only 1 4 of what is needed. The device can be used as a 1to 16 demultiplexer by. Answer to design a 4 to 16 line decoder using two 3to8 line decoders and 16 2 input and gate.

Digital circuits decoders decoder is a combinational circuit that has. Im trying to implement a 4 to 16 decoder using 2 to 4 decoder and 3 to 8 decoder. Two activelow and one activehigh enable inputs reduce the need for external gates or inverters. 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. Any pointers on where to go from here are appreciated. Here is what i did, note that i couldnt continue writing the full table.

One of these outputs will be active high based on the comb. An example of a 2to4 line decoder along with its truth table is given as. Binary decoders are another type of digital logic device that has inputs of 2bit, 3bit or 4bit. Design a 4 to 16 line decoder using two 3to8 line decoders and 16 2 input and gate. Used to activate exactly one of 2n outputs based on nbit. Design a 2 to 4 decoder using 4 to 16 decoder physics forums. 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. A high on either of the input enables forces the outputs high. Design of low power, high performance 24 and 416 mixed. It decodes four binary weighted address inputs a0 to a3 to sixteen mutually exclusive outputs y0 to y15.