Logic Diagram Of 3 To 8 Line Decoder

Technical datasheet 74hc138 logical block 1. The ic 74ls138 is a 3 to 8 line decoder integrated circuit from the 74xx family of transistor transistor logic gates. 3 to 8 line decoder has a memory of 8 stages.

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74ls138 Decoder Pinout Electronics Circuit Diy Electronics Circuit

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Description of each and every pin in 74138.

Logic diagram of 3 to 8 line decoder. Ls138 3 to 8 line decoder circuit duration. Why 74138 has 3 enable pins is also discussed. The circuit is designed with and and nand logic gates. You can clearly see the logic diagram is developed using the and gates and the not gates.

It is also called a binary to octal decoder since the inputs represent 3 bit binary numbers and the outputs represent the eight digits in the octal number system. 3 line to 8 line decoder. Logic diagram of 3 to 8 decoder. The inputs are represented by x y and z while the compliments are.

Pin diagram of 3 8 decoder. The complement of input a3 is connected to enable e of lower 3 to 8 decoder in order to get the outputs y 7 to y 0. It takes 3 binary inputs and activates one of the eight outputs. Decoders are important logic blocks that find a wide variety of applications in the design.

This is also called a 1 of 8 decoder since only one of eight output lines is high for a particular input combination. This decoder circuit gives 8 logic outputs for 3 inputs and has a enable pin. Thus the decoder is a min term generator in which each output corresponds to one min term. It is convenient to use an and gate as the basic decoding element for the output because it produces a high or logic 1 output only when all of its inputs are logic 1.

The main function of this ic is to decode otherwise demultiplex the applications. The parallel inputs a 2 a 1 a 0 are applied to each 3 to 8 decoder. The decoder s 8 outputs can drive 10 low power schottky ttl equivalent loads. The setup of this ic is accessible with 3 inputs to 8 output setup.

The block diagram of 4 to 16 decoder using 3 to 8 decoders is shown in the following figure. Basics of decoder. Introduction a n to 2 n decoder is a combinatorial logic device which has n input lines and 2 n output lines for each possible combination of n input binary lines one and only one output signal will be logic 1. 74hc138 3 to 8 line decoder demultiplexer logic block the 74hc138 decoder accepts three binary weighted address inputs a0 a1 and a3 and when enabled provides 8 mutually exclusive active low outputs y0 to y7.

High speed cmos logic 3 to 8 line decoder demultiplexer inverting and non inverting. 3 to 8 line decoder circuit is also called as binary to an octal decoder.