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Address decoding using 74ls138. See full list on elprocus.

  • Address decoding using 74ls138. The actual purpose of this chip is designed for demultiplexing or in machine language we can say as a decoding device. The multiple input enables allow parallel expansion to a 1-of-24 decoder using just three LS138 devices or to a 1-of-32 decoder using four LS138s and one inverter. The address inputs C, B, and A connect to MEMORY INTERFACING The address of a memory location or an I/O devices is sent out by microprocessor. Oct 26, 2018 · The chip is designed for decoding or de-multiplexing applications and comes with 3 inputs to 8 output setup. The decoding task can be performed by a decoder, a comparator, a bipolar PROM or PLA. Jun 4, 2021 · About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy & Safety How YouTube works Test new features NFL Sunday Ticket © 2025 Google LLC Apr 16, 2024 · 74LS138 is a member of the "74xx" family of TTL logic gates. Here we use 74LS138 which is a 1 to 8 lines decoder. It is a commonly used decoder chip, also known as a 3-8 decoder. When all three address inputs are high, the output of this NAND gate goes low and enables input ̅̅̅̅̅̅of the 74LS138. The following diagram (iii) shows the interface of memory chips with 74LS138 . Its 3-to-8 configuration makes it ideal for decoding applications, ensuring efficient signal routing and control in digital systems. Nov 29, 2024 · The 74LS138 is widely used as a line decoder in digital circuits to convert binary inputs into unique output signals. The corresponding memory chip or I/O devices is selected by a decoding circuit. This device is ideally suited for high speed bipolar memory chip select address decoding. See full list on elprocus. Among them, 54LS138 is mainly for military use, while 74LS138 is suitable for civilian use. com 74LS138 is a complex TTL based logical device used to convert 3-bit binary data to 8-bits. Input G1 is connected directly to A16. This article explores how the 74LS138 three-wire eight-wire decoder functions, its importance in address decoding, and practical considerations when using it in real-world applications. There are two line structure types of this chip, namely 54LS138 and 74LS138. The 74LS138 streamlines the design process by Jun 4, 2021 · PHY4E20 - Calicut University MSc Physics- MicroprocessorsMicroprocessor 8085 - IO Address decoding using 74LS138 Jun 4, 2021 · PHY4E20 - Calicut University MSc Physics- MicroprocessorsMicroprocessor 8085 - Memory Address decoding using 74LS138 A three-input NAND gate is connected to address bits A19–A17. The design is also made for the chip to be used in high-performance memory-decoding or data-routing applications, requiring very short propagation delay times. In other words, in order to enable this decoder, the first four address connections (A19–A16) must all be high. This chip excels in high-performance memory decoding or data routing applications, especially where The 74LS138 decoder chip, part of the well-regarded "74xx" family of TTL logic gates, is a highly regarded component in digital circuits. A PAL example (16L8) is shown in the text and is commonly used to decode the memory address, particularly for 32-bit addresses generated by the 80386DX and above. Available in two variants—54LS138 for military applications and 74LS138 for civilian use—this chip excels in high-performance memory decoding and data routing, courtesy of its minimal propagation delay. tltpe pwfyjoi mteyhcp kskok ketz pludbfh jknsu mkzq ofdrjg pltla