3 to 8 decoder using 74ls138 pdf

This is a basic introduction and example of using the 74ls8 decoderdemultiplexer to convert from a 3 pin serial to an 8 pin parallel output. The main function of this ic is to decode otherwise demultiplex the applications. The chip is designed for decoding or demultiplexing applications and comes with 3 inputs to 8 output setup. Retired 74ls8 ic, 3 to 8 decoderdemultiplexer, dil. Decodes oneofeight lines based upon the select inputs. Device is in production to support existing customers, but ti does not recommend using this part in a new design. Designing of 3 to 8 line decoder and demultiplexer using. A decoder is a combinational logic circuit which is used to change the code into a set of signals. Designing of 3 line to 8 line decoder and demultiplexer. The decoder will decode the 3bit address and generate a select line for one of the eight words corresponding to the input address. Buy 3 pcs of 74ls8 hd74ls8p 748 3 to 8 decoderdemultiplexer ic integrated circuit. Two types of decoders commonly used in m68k systems are 74ls8 3 to 8 decoder from mct 3235 at international islamic university malaysia.

This ic is mainly used in applications like memory decoding with high. The design is also made for the chip to be used in highperformance memorydecoding or datarouting applications, requiring very short propagation delay times. The multiple input enables allow parallel ex pansion to a 1of24 decoder using just three ls8 devices or to a 1of32 decoder. The lsttlmsi sn54 74ls8 is a high speed 1of 8 decoder demultiplexer. The device features three enable inputs e1 and e2 and. Y ls8 3to8line decoders incorporates 3 enable in puts to simplify. In highperformance memory systems these decoders can. Dm74ls9 decoder demultiplexer 74ls8 74ls8 smd 74ls9 decoderdemultiplexer general description these schottkyclamped circuits are designed to be used in highperformance memorydecoding or datarouting applications, requiring very short propagation delay times. It accepts three binary weighted address inputs a0, a1. Product of sum pos product of sum method is also called as. A decoder circuit takes multiple inputs and gives multiple outputs. Device has been announced but is not in production. Two types of decoders commonly used in m68k systems are.

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 one inverter. 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. The chip is designed for decoding or demultiplexing applications and comes with 3. The lsttlmsi sn74ls8 is a high speed 1of 8 decoder demultiplexer.