datasheetbank_Logo     Integrated circuits, Transistor, Semiconductors Search and Datasheet PDF Download Site
HOME  >>>  National-Semiconductor  >>> 54LS257ALMQB PDF

54LS257ALMQB Datasheet PDF - National ->Texas Instruments

Part NameDescriptionManufacturer
54LS257ALMQB TRI-STATE® Quad 2-Data Selectors/Multiplexers National-Semiconductor
National ->Texas Instruments National-Semiconductor
Other PDF  no available.
54LS257ALMQB Datasheet PDF : 54LS257ALMQB pdf   
DM74LS257B image

General 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 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.

Features
● 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 high performance 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 Semicon ductor Sales Office/Distributor for specifications.

Page Links : 1  2  3  4  5  6  7  8 

 

Other manufacturer searches related to 54LS257ALMQB

Part NameDescriptionPDFManufacturer
HD74HC258 Quad. 2-to-1-line Data Selectors/Multiplexers (with 3-state outputs) HD74HC258 View Hitachi -> Renesas Electronics
HC257 Quad. 2-to-1-line Data Selectors/Multiplexers (with noninverted 3-state outputs) HC257 View Hitachi -> Renesas Electronics
HD74HC258FPEL Quad. 2-to-1-line Data Selectors/Multiplexers (with 3-state outputs) HD74HC258FPEL View Renesas Electronics
74HC257 Quad. 2-to-1-line Data Selectors/Multiplexers (with noninverted 3-state outputs) 74HC257 View Hitachi -> Renesas Electronics
DM74LS257 3-STATE Quad 2-Data Selectors/Multiplexers DM74LS257 View Fairchild Semiconductor
HD74HC257 Quad. 2-to-1-line Data Selectors/Multiplexers (with noninverted 3-state outputs) HD74HC257 View Renesas Electronics
MC74HC157 Quad 2−Input Data Selectors / Multiplexers MC74HC157 View ON Semiconductor
NLV74HC157ADR2G Quad 2-Input Data Selectors/Multiplexers NLV74HC157ADR2G View ON Semiconductor
HD74HC157 Quad. 2-to-1-line Data Selectors/Multiplexers HD74HC157 View Renesas Electronics
74HCT157DR2G Quad 2−Input Data Selectors / Multiplexers 74HCT157DR2G View ON Semiconductor

Share Link : 

한국어 简体中文 日本語 русский español


All Rights Reserved © datasheetbank.com 2014 - 2019  ] [ Privacy Policy ] [ Request Datasheet  ] [ Contact Us ]