74LS257B, 74LS258B - Quad 2-Data Selectors/Multiplexers

National Semiconductor

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74LS257B Datasheet Preview — This datasheet PDF includes multiple part numbers: 74LS257B, 74LS258B. Please refer to the document for exact specifications by model.

Datasheet Details

Part number	74LS257B, 74LS258B
Manufacturer	National Semiconductor
File Size	154.51 KB
Description	Quad 2-Data Selectors/Multiplexers
Datasheet	74LS258B-NationalSemiconductor.pdf
Note	This datasheet PDF includes multiple part numbers: 74LS257B, 74LS258B. Please refer to the document for exact specifications by model.

74LS257B 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 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-.

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Published: May 11, 2022 |