74LS257 - TRI-STATE Quad 2-Data Selectors/Multiplexers

National Semiconductor

74LS257 Datasheet Preview — Preview of 74LS257 PDF

Datasheet Details

Part number	74LS257
Manufacturer	National Semiconductor ↗
File Size	163.71 KB
Description	TRI-STATE Quad 2-Data Selectors/Multiplexers
Datasheet	74LS257_NationalSemiconductor.pdf

74LS257 Product details

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

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Other Datasheets by National Semiconductor

74LS258B - Quad 2-Data Selectors/Multiplexers
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Published: Apr 23, 2005 |