74F257A ,Quad 2-Input Multiplexer with TRI-STATE Outputs54F/74F257AQuad2-InputMultiplexerwithTRI-STATEOutputsNovember199454F/74F257AQuad2-InputMultiplexerw ..
74F257APC ,Quad 2-Input Multiplexer with 3-STATE OutputsFunctional DescriptionThe 74F257A is a quad 2-input multiplexer with 3-STATEOutput Select Dataoutpu ..
74F257ASC ,Quad 2-Input Multiplexer with 3-STATE Outputs74F257A Quad 2-Input Multiplexer with 3-STATE OutputsApril 1988Revised September 200074F257AQuad 2- ..
74F257ASCX ,Quad 2-Input Multiplexer with 3-STATE OutputsFunctional DescriptionThe 74F257A is a quad 2-input multiplexer with 3-STATEOutput Select Dataoutpu ..
74F257ASCX ,Quad 2-Input Multiplexer with 3-STATE OutputsFunctional DescriptionThe 74F257A is a quad 2-input multiplexer with 3-STATEOutput Select Dataoutpu ..
74F257ASCX ,Quad 2-Input Multiplexer with 3-STATE Outputs74F257A Quad 2-Input Multiplexer with 3-STATE OutputsApril 1988Revised September 200074F257AQuad 2- ..
74HCT648N ,Octal bus transceiver/register; 3-state; inverting
74HCT648N ,Octal bus transceiver/register; 3-state; inverting
74HCT652 ,3-state
74HCT652 ,3-state
74HCT652 ,3-state
74HCT652D ,Octal bus transceiver/register; 3-stateAPPLICATIONSthe “B” bus and transfer stored ”B”can directly go from input to outputdata to the ”A” ..
74F257A
Quad 2-Input Multiplexer with TRI-STATE Outputs
TL/F/9507
54F/74F257A
Quad
2-Input
Multiplexer
with
TRI-STATE
Outputs
November 1994
54F/74F257A
Quad 2-Input Multiplexer with TRI-STATEÉ Outputs
General Description
The ’F257Aisa quad 2-input multiplexer with TRI-STATE
outputs. Fourbitsof data fromtwo sourcescanbe selected
usinga Common Data Select input. The four outputs pres-
entthe selected datain true (non-inverted) form. Theout-
puts maybe switchedtoa high impedance state witha
HIGHonthe common Output Enable (OE) input, allowing
the outputsto interface directly with bus-oriented systems.
Features Multiplexer expansionby tying outputs together Non-inverting TRI-STATE outputs Input clamp diodes limit high-speed termination effects Guaranteed 4000V minimum ESD protection
Commercial Military Package PackageDescriptionNumber
74F257APC N16E 16-Lead(0.300× Wide) Molded Dual-In-Line
54F257ADM (Note2) J16A 16-LeadCeramic Dual-In-Line
74F257ASC(Note1) M16A 16-Lead(0.150× Wide) Molded Small Outline, JEDEC
74F257ASJ (Note1) M16D 16-Lead(0.300× Wide) Molded Small Outline, EIAJ
54F257AFM (Note2) W16A 16-LeadCerpack
54F257ALL (Note2) E20A 20-LeadCeramic Leadless ChipCarrier, TypeC
Note1: Devicesalso availablein13×reel.Usesuffixe SCXandSJX.
Note2: Military grade devicewith environmentaland burn-in processing. Usesuffixe DMQB, FMQBand LMQB.
Logic Symbols Connection Diagrams
TL/F/9507–3
IEEE/IEC
TL/F/9507–5
Pin Assignment
for DIP, SOICand Flatpak
TL/F/9507–1
Pin Assignment
for LCC
TL/F/9507–2
TRI-STATEÉ isaregistered trademarkof National SemiconductorCorporation.
C1995National SemiconductorCorporation RRD-B30M75/PrintedinU.S.A.
