Manufacturer: National Semiconductor (now Texas Instruments)
Download the DM74LS257B datasheet PDF.
This datasheet also includes the DM74LS257BNationalSemiconductor variant, as both parts are published together in a single manufacturer document.
Note: The manufacturer provides a single datasheet file (DM74LS257BNationalSemiconductor.pdf) that lists specifications for multiple related part numbers.
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-.
