4/1/2023 0 Comments 74155 ic logicworks![]() This reduces the possibility of transients occurring at the output(s) due to changes made at the select inputs, even when the '151A outputs are enabled (i.e., strobe low). Let us suppose that there are eight 1K × 8 sized chips of EPROM, where we want the starting of address to be 2000H, 2400H, 2800H,, 3C00H. The '151A and '152A incorporate address buffers that have symmetrical propagation delay times through the complementary paths. Use of 74138 to generate chip select logic: We use the logic of selection to generate signals for chip selection tending to eight chips in a microcomputer system. The '150 has only an inverted W output the '151A, 'LS151, and 'S151 feature complementary W and Y outputs. A high level at the strobe forces the W output high, and the Y output (as applicable) low. The '150, '151A, 'LS151, and 'S151 have a strobe input which must be at a low logic level to enable these devices. The '150 selects one-of-sixteen data sources the '151A, 'LS151, and 'S151 select one-of-eight data sources. These monolithic data selectors/multiplexers contain full on-chip binary decoding to select the desired data source.
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