Tri-state Quad 1 Of 2 Data Selectors / Multiplexers - National Semiconductor

These Schottky-clamped high-performance multiplexers DM54S257 DM74S257 DM54S258 DM74S258 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 possibil- ity 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 times are shorter than the out- put enable times. This TRI-STATE output feature means that n-bit (paralleled) data selectors with up to 258 sources CAN be implemented for data buses. It also permits the use of standard TTL reg- isters for data retention throughout the system. By National Semiconductor Corporation
Part Manufacturer Description Datasheet Samples
DM54S257J/883 Rochester Electronics LLC Multiplexer, S Series, 4-Func, 2 Line Input, 1 Line Output, True Output, TTL, CDIP16, CERAMIC, DIP-16
DM54S257W Rochester Electronics LLC Multiplexer
DM54S257J Rochester Electronics LLC Multiplexer
DM54S257 's PackagesDM54S257 's pdf datasheet

DM54S257 Pinout, Pinouts
DM54S257 pinout,Pin out
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