INTEGRAL IN74ALS27N Datasheet
TECHNICAL DATA
TRIPLE 3-INPUT POSITIVENOR GATE
This device contains three independent 3-input
positive-NOR gates. They perform the Boolean
functions Y=A+B+C or Y=A+B+C in positive logic.
The IN74ALS27A is characterized for operation from
0°C to 70°C
ORDERING INFORMATION
IN74LS27N Plastic
IN74ALS27D SOIC
T
A
= 0° to 70° C for all
packages
Logic Symbol Logic Diagram (Positive Logic)
IN74ALS27A
FUNCTION TABLE
INPUTS OUTPUT
AB C Y
HX X L
XH X L
XX H L
LL L H
PIN ASSIGNMENT
IN74ALS27A
2
ABSOLUTE MAXIMUM RATINGS OVER OPERATING FREE-AIR
TEMPERATURE RANGE
Su
pply
voltage, Vcc 7 V
Input voltage, V
l
7 V
Operating free-air temperature range, T
A
0°C to 70°C
Storage temperature range
-65°C to 150°C
RECOMMENDED OPERATING CONDITIONS
MIN NOM MAX UNIT
V
CC
Supply voltage 4.5 5 5.5 V
V
IH
High-level input voltage2V
V
IL
Low-level input voltage 0.8 V
I
OH
High-level output current -0.4 mA
I
OL
Low-level output current 8 mA
T
A
Operating free-air temperature 0 70
o
C
ELECTRICAL CHARACTERISTICS OVER RECOMMENDED OPERATING FREEAIR TEMPERATURE RANGE
Parameter Test Conditions MIN TYP** MAX UNI
V
IK
VCC=4.5V II =-18mA -1.5 V
V
OH
VCC=4.5V to 5.5V IOH =-0.4mA VCC-2 V
V
OL
VCC=4.5V IOL =4mA 0.25 0.4 V
IOL =8mA 0.35 0.5 V
I
I
VCC=5.5V VI=7V 0.1 mA
I
IH
VCC=5.5V VI=2.7V 20
µ
A
I
IL
VCC=5.5V VI=0.4V -0.1
mΑ
IO *V
CC
=5.5V VO=2.25V -30 -112
mΑ
I
CCH
VCC=5.5V VI=0 0.97 1.8
mΑ
I
CCL
VCC=5.5V VI=4.5V 2 4
mΑ
*
The output conditions have been chosen to produce a current that closely approximates one half of the true
short-circuit output current, I
OS
**
All typical values are at VCC=5V, TA=25oC
SWITCHING CHARACTERISTICS
Parameter From (input) To (output)
V
CC
=4.5V to 5.5V,
CL=50pF, RL=500 Ohm,
TA=MIN to MAX*
UNIT
MIN MAX
t
PHL
A, B or C Y 3 15 ns
t
PLH
1 9 ns
*
For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating
conditions
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