The DM74LS257B is TRI-STATE Quad 2-Data Selectors/Multiplexers designed by National Semiconductor.
| Part number | DM74LS257B, DM74LS257BNationalSemiconductor |
|---|---|
| Manufacturer | National Semiconductor |
| File Size | 360.47 KB |
| Description | TRI-STATE Quad 2-Data Selectors/Multiplexers |
| Datasheet |
 DM74LS257BNationalSemiconductor.pdf
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| Note |
This datasheet PDF includes multiple part numbers: DM74LS257B, DM74LS257BNationalSemiconductor. Please refer to the document for exact specifications by model. |
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These Schottky-clamped high-performance multiplexers feature TRI-STATE outputs that can interface directly with data lines of bus-organized systems With all but one of the common outputs disabled (at a high impedance state) the low impedance of the single enabled output will drive the bus line to a high or low logic level To minimize the possibility that two outputs will attempt to take a common bus to opposite logic levels the output enable circuitry is designed such that the output disable tim
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