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 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
Features
- Y TRI-STATE versions LS157 and LS158 with same pinouts
Y Schottky-clamped for significant improvement in A-C performance
Y Provides bus interface from multiple sources in highperformance systems
Y Average propagation delay from data input 12 ns
Y Typical power dissipation LS257B 50 mW LS258B 35 mW
Y Alternate military aerospace devices (54LS257A 54LS258A) are available Contact a National Semiconductor Sales Office Distributor for specifications
Connection Diagrams
Dual-In-Line Package
Dual-In-.
DM54LS257BJ_NationalSemiconductor.pdf