• Part: DM54LS258B
  • Description: TRI-STATE Quad 2-Data Selectors/Multiplexers
  • Manufacturer: National Semiconductor
  • Size: 163.71 KB
DM54LS258B Datasheet (PDF) Download
National Semiconductor
DM54LS258B

Description

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 mon 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 mon bus to opposite logic levels the output enable circuitry is designed such that the output disable times are shorter than the output 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 registers for data retention throughout the system.