DM74LS244SJ ,Octal 3-STATE Buffer/Line Driver/Line ReceiverDM74LS244 Octal 3-STATE Buffer/Line Driver/Line ReceiverAugust 1986Revised March 2000DM74LS244Octal ..
DM74LS244WM ,Octal 3-STATE Buffer/Line Driver/Line ReceiverFeaturesYTypical power dissipation (enabled)YTRI-STATE outputs drive bus lines directlyInverting 13 ..
DM74LS244WMX , Octal 3-STATE Buffer/Line Driver/Line ReceiverFeaturesThese buffers/line drivers are designed to improve both the ■ 3-STATE outputs drive bus lin ..
DM74LS245N ,3-STATE Octal Bus TransceiverFeaturesThese octal bus transceivers are designed for asynchro- ■ Bi-Directional bus transceiver in ..
DM74LS245SJX , Octal 3-STATE Bus TransceiverDM74LS245 3-STATE Octal Bus TransceiverAugust 1986Revised March 2000DM74LS2453-STATE Octal Bus Tran ..
DM74LS245WM ,3-STATE Octal Bus TransceiverFeatures YAlternate Military/Aerospace device (54LS245) is avail-YBi-Directional bus transceiver in ..
DS21Q354B ,Quad T1/E1 Transceiver (3.3V, 5.0V)FEATURESP• Four (4) Completely Independent T1 or E1 Transceivers In One Small 27mm x 27mm Package • ..
DS21Q41B ,Quad T1 Framerapplications that require more than one T1 framer on a card. TheQuad version is only slightly bigge ..
DS21Q41BT ,Quad T1 Framerapplications that require more than one T1 framer on a card. TheQuad version is only slightly bigge ..
DS21Q41BT ,Quad T1 FramerFEATURES FUNCTIONAL DIAGRAM§ Four T1 DS1/ISDN-PRI framing transceivers§ All four framers are fully ..
DS21Q42 ,Enhanced Quad T1 FramerFEATURES FUNCTIONAL DIAGRAM Four T1 DS1/ISDN-PRI/J1 framingtransceiversRece ive Elastic All four ..
DS21Q43AT ,Quad E1 Framerapplications§ Detects and generates AIS, remote alarm, and QUADE1remote multiframe alarmsFRAMER§ Pi ..
54LS244DMQB-DM74LS244N-DM74LS244WM
Octal TRI-STATEE Buffers/Line Drivers/Line Receivers
TL/F/8442
54LS244/DM74LS244
Octal
TRI-STATE
Buffers/Line
Drivers/Line
Receivers
August 1989
54LS244/DM74LS244 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 Diagram
Dual-In-Line Package
TL/F/8442–1
OrderNumber54LS244DMQB, 54LS244FMQB,54LS244LMQB,
DM74LS244WM orDM74LS244N
See NSPackage Number E20A, J20A, M20B, N20AorW20A
Function Table
Inputs Output AY L H ZeLow Logic LeveleHigh Logic Levele EitherLoworHigh Logic Levele HighImpedance
TRI-STATEÉ isaregistered trademarkof National SemiconductorCorporation.
C1995National SemiconductorCorporation RRD-B30M105/PrintedinU.S.A.
