DM54LS240J/883 ,Octal TRI-STATE Buffer/Line Driver/Line Receiver (Inverting)DM54LS240/DM74LS240,DM54LS241/DM74LS241OctalTRI-STATEBuffers/LineDrivers/LineReceiversApril1992DM54 ..
DM54LS240J/883 ,Octal TRI-STATE Buffer/Line Driver/Line Receiver (Inverting)FeaturesYTypical power dissipation (enabled)YTRI-STATE outputs drive bus lines directlyInverting 13 ..
DM54LS245J ,TRI-STATE Octal Bus TransceiverFeatures YAlternate Military/Aerospace device (54LS245) is avail-YBi-Directional bus transceiver in ..
DM54LS251J ,TRI-STATE Data Selectors/MultiplexersFeaturesYTRI-STATE version of LS151These data selectors/multiplexers contain full on-chip bina-Yry ..
DM54LS259J/883 ,8-Bit Serial In to Parallel Out Addressable LatchesapplicationsFour distinct modes of operation are selectable by control-YFour distinct functional mo ..
DM54LS279J ,Quad S-R LatchesFeaturesstored in the latch and appear on the corresponding Q out-YAlternate military/aerospace dev ..
DS1666-010 ,Audio digital resistor, 10KOhmPIN DESCRIPTIONSincrement. The state of the U/D pin can be changed whileV The high end of the pote ..
DS1666-050 ,Audio digital resistor, 50KOhmFEATURES PIN ASSIGNMENT• 128 position, digitally controlled potentiometerNC 1 14 NC• Operates from ..
DS1666-10 ,Audio Digital ResistorPIN DESCRIPTIONDS1666–50 50KΩ 122Ω 759Ω 200 KHzV – High Terminal of ResistorHDS1666–100100KΩ 243Ω 1 ..
DS1666-100 ,Audio digital resistor, 100KOhmPIN DESCRIPTIONSincrement. The state of the U/D pin can be changed whileV The high end of the pote ..
DS1666S ,Audio Digital ResistorPIN DESCRIPTIONSV - High Terminal of PotentiometerHV - Low Terminal of PotentiometerLV - Wiper Term ..
DS1666S-010 ,Audio digital resistor, 10KOhmFEATURES PIN ASSIGNMENT• 128 position, digitally controlled potentiometerNC 1 14 NC• Operates from ..
DM54LS240J/883
Octal TRI-STATE Buffer/Line Driver/Line Receiver (Inverting)
TL/F/6411
DM54LS240/DM74LS240,
DM54LS241/DM74LS241
Octal
TRI-STATE
Buffers/Line
Drivers/Line
Receivers
April 1992
DM54LS240/DM74LS240,
DM54LS241/DM74LS241
Octal TRI-STATEÉ Buffers/Line Drivers/Line Receivers
General Description
These buffers/line driversare designedto improve boththe
performanceandPC board densityof TRI-STATE buffers/
drivers employedas memory-address drivers, clock drivers,
and bus-oriented transmitters/receivers. Featuring 400mV hysteresisat eachlow current PNP dataline input, they
provide improved noise rejection and high fanout outputs
andcanbe usedto drive terminated lines downto 133X.
Features TRI-STATE outputs drivebus lines directly PNP inputs reduceDC loadingonbus lines Hysteresisat data inputs improves noise margins TypicalIOL (sink current)
54LS 12mA
74LS 24mA TypicalIOH (source current)
54LS b12mA
74LS b15mA Typical propagation delay times
Inverting 10.5ns
Noninverting 12ns Typical enable/disable time18ns Typical power dissipation (enabled)
Inverting 130 mW
Noninverting 135 mW
Connection Diagrams
Dual-In-Line Package
TL/F/6411–1
Dual-In-Line Package
TL/F/6411–2
Order Number DM54LS240J,
DM54LS240W, DM54LS240E,
DM74LS240WMor DM74LS240N
SeeNS Package Number E20A, J20A,
M20B, N20AorW20A
Order NumberDM54LS241J,
DM54LS241W, DM54LS241E,
DM74LS241WMor DM74LS241N
SeeNS Package Number E20A, J20A,
M20B, N20Aor W20A
Function Tables
LS240
Inputs Output AY H L Z
LS241
Inputs Outputs 1A 2A 1Y 2Y L X L H X H X X Z X L L X H H X X ZeLow Logic LeveleHigh Logic Levele Either LoworHigh Logic Levele HighImpedance
TRI-STATEÉ isaregistered trademarkof National SemiconductorCorporation.
C1995National SemiconductorCorporation RRD-B30M105/PrintedinU.S.A.
