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SN74HC27TIN/a20avaiTriple 3-Input Positive-NOR Gates
SN74HC27DTIN/a459avaiTriple 3-Input Positive-NOR Gates
SN74HC27DRTEXASN/a50avaiTriple 3-Input Positive-NOR Gates
SN74HC27NTIN/a288avaiTriple 3-Input Positive-NOR Gates
SN74HC27NSRTIN/a1355avaiTriple 3-Input Positive-NOR Gates


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SN74HC27-SN74HC27D-SN74HC27DR-SN74HC27N-SN74HC27NSR
Triple 3-Input Positive-NOR Gates
GND
VCC
SN74HC27... D, DB, N, OR NS PACKAGE
(TOP VIEW)
1ANC3A1C
GND
(TOP VIEW)

NC – No internal connection
description/ordering information

The ’HC27 devices contain three independent 3-input NOR gates. They perform the Boolean function
Y = A + B + C or Y = A • B • C in positive logic.
ORDERING INFORMATION

†Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are
available at www.ti.com/sc/package.
FUNCTION TABLE
(each gate)

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
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