Overview
Description
The HD74LS138 decodes one-of-eight line dependent on the conditions at the three binary select inputs and the three enable inputs. Two active-low and one active-high enable inputs reduce the need for external gates or inverters when expanding. A 24-line decoder can be implemented without external inverters and a 32-line decoder requires only one inverter. An enable input can be used as a data input for demultiplexing applications.
Comparison
Applications
Documentation
Featured Documentation
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| Type | Title | Date |
| Datasheet | PDF 114 KB 日本語 | |
| Product Change Notice | PDF 4.86 MB 日本語 | |
| Product Change Notice | PDF 3.74 MB 日本語 | |
| Product Change Notice | PDF 1.46 MB 日本語 | |
| Brochure | PDF 5.23 MB | |
| Brochure | PDF 1.32 MB | |
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Design & Development
Models
ECAD Models
Schematic symbols, PCB footprints, and 3D CAD models from SamacSys can be found by clicking on the CAD Model links in the Product Options table. If a symbol or model isn't available, it can be requested directly from SamacSys.
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