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
DM74S257
DM54S258
DM74S258




DM54S257 Pinout, Pinouts
DM54S257 pinout,Pin out
This is one package pinout of DM54S257,If you need more pinouts please download DM54S257's pdf datasheet.

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