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DM74LS139MXFAIRCHILDN/a2299avai Dual 2-to-4 Line Decoder/Demultiplexer


DM74LS139MX , Dual 2-to-4 Line Decoder/Demultiplexerapplications.The DM74LS139 comprises two separate two-line-to-four-line decoders in a single packag ..
DM74LS139N ,Decoders/DemultiplexersFeaturesused to minimize the effects of system decoding. WhenYDesigned specifically for high speed: ..
DM74LS139SJ ,Decoder/DemultiplexerDM74LS138 • DM74LS139 Decoder/DemultiplexerAugust 1986Revised March 2000DM74LS138 • DM74LS139Decode ..
DM74LS139SJ ,Decoder/DemultiplexerFeaturesThese Schottky-clamped circuits are designed to be used Designed specifically for high spe ..
DM74LS14M ,Hex Inverter with Schmitt Trigger InputsGeneral DescriptionThis device contains six independent gates each of whichperforms the logic INVER ..
DM74LS14N ,Hex Inverter with Schmitt Trigger InputsGeneral DescriptionThis device contains six independent gates each of whichperforms the logic INVER ..
DS2152L ,Enhanced T1 Single-Chip TransceiverFEATURES PIN ASSIGNMENT§ Complete DS1/ISDN-PRI transceiverfunctionality§ Line interface can handle ..
DS2153Q ,E1 Single Chip TransceiverTABLE OF CONTENTS 1 DETAILED DESCRIPTION.4 1.1 INTRODUCTION..4 1.2 READER’S NOTE4 2
DS2153Q-A7 ,E1 Single Chip TransceiverApplications ALE(AS) 7 TSER 39 Fully Independent Transmit and Receive 8 38WR (R/W) TCLK Functiona ..
DS2154L ,Enhanced E1 Single Chip TransceiverTABLE OF CONTENTS1.0 INTRODUCTION.4New
DS2154L+ ,Enhanced E1 Single Chip TransceiverTABLE OF CONTENTS 1 DETAILED DESCRIPTION.6 1.1 INTRODUCTION ........6 1.1.1 New
DS2154LA2 ,Enhanced E1 Single Chip TransceiverApplications Fully Independent Transmit and Receive Functionality ORDERING INFORMATION Full Acce ..


DM74LS139MX
Dual 2-to-4 Line Decoder/Demultiplexer
DM74LS138 • DM74LS139 Decoder/Demultiplexer August 1986 Revised March 2000 DM74LS138 • DM74LS139 Decoder/Demultiplexer General Description Features These Schottky-clamped circuits are designed to be used � Designed specifically for high speed: in high-performance memory-decoding or data-routing Memory decoders applications, requiring very short propagation delay times. Data transmission systems In high-performance memory systems these decoders can � DM74LS138 3-to-8-line decoders incorporates 3 enable be used to minimize the effects of system decoding. When inputs to simplify cascading and/or data reception used with high-speed memories, the delay times of these � DM74LS139 contains two fully independent 2-to-4-line decoders are usually less than the typical access time of the memory. This means that the effective system delay decoders/demultiplexers introduced by the decoder is negligible. � Schottky clamped for high performance The DM74LS138 decodes one-of-eight lines, based upon � Typical propagation delay (3 levels of logic) the conditions at the three binary select inputs and the DM74LS138 21 ns three enable inputs. Two active-low and one active-high DM74LS139 21 ns enable inputs reduce the need for external gates or invert- � Typical power dissipation ers when expanding. A 24-line decoder can be imple- mented with no external inverters, and a 32-line decoder DM74LS138 32 mW requires only one inverter. An enable input can be used as DM74LS139 34 mW a data input for demultiplexing applications. The DM74LS139 comprises two separate two-line-to-four- line decoders in a single package. The active-low enable input can be used as a data line in demultiplexing applica- tions. All of these decoders/demultiplexers feature fully buffered inputs, presenting only one normalized load to its driving circuit. All inputs are clamped with high-performance Schottky diodes to suppress line-ringing and simplify sys- tem design. Ordering Code: Order Number Package Number Package Description DM74LS138M M16A 16-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150 Narrow DM74LS138SJ M16D 16-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide DM74LS138N N16E 16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide DM74LS139M M16A 16-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150 Narrow DM74LS139SJ M16D 16-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide DM74LS139N N16E 16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code. © 2000 DS006391
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