MM74HC244 ,Octal TRI-STATE(RM) BufferMM54HC244/MM74HC244OctalTRI-STATEBufferJanuary1988MM54HC244/MM74HC244OctalTRI-STATEÉBufferGeneralDe ..
MM74HC244MTC ,Octal 3-STATE BufferFeaturesThe MM74HC244 is a non-inverting buffer and has two
MM74HC244
Octal TRI-STATE(RM) Buffer
TL/F/5327
MM54HC244/MM74HC244
Octal
TRI-STATE
Buffer
January 1988
MM54HC244/MM74HC244
Octal TRI-STATEÉ Buffer
General Description
These TRI-STATE buffers utilize advanced silicon-gate
CMOStechnologyandare general purpose highspeednon-
inverting buffers. They possess high drive current outputs
which enable high speed operation even when driving large
bus capacitances. These circuits achieve speeds compara-
bletolow power Schottky devices, while retainingthead-
vantageof CMOS circuitry,i.e., high noise immunity, and
low power consumption.All three devices havea fanoutof LS-TTL equivalent inputs.
The MM54HC244/MM74HC244isa non-inverting buffer
andhastwo activelow enables(1Gand 2G). Each enable
independently controls4 buffers. This device doesnot have
Schmitt trigger inputs.
All inputsare protected from damage dueto staticdis-
chargeby diodesto VCCand ground.
Features Typical propagation delay:14ns TRI-STATE outputsfor connectionto system buses Wide power supply range: 2–6V Low quiescent supply current:80mA(74 Series) Output current:6mA
Connection Diagram
Dual-In-Line Package
TL/F/5327–1
Top View
OrderNumber MM54HC244orMM74HC244
Truth Table
’HC244 1A 1Y 2G 2A 2Y L LL L H LH H
HLZ H LZ
HHZ H HZehigh level,Lelow level,Zehigh impedance
TRI-STATEÉ isaregistered trademarkof National SemiconductorCorp.
C1995National SemiconductorCorporation RRD-B30M105/PrintedinU.S.A.
