Page 1
Triple 3-Input NOR Gate
High-Speed Silicon-Gate CMOS
The IN74AC27 is identical in pinout to the LS/ALS27,
HC/HCT27. The device inputs are compatible with standard CMOS
outputs; with pullup resistors, they are compatible with LS/ALS
outputs.
•
Outputs Directly Interface to CMOS, NMOS, and TTL
•
Operating Voltage Range: 2.0 to 6.0 V
•
Low Input Current: 1.0 µA; 0.1 µA @ 25°C
•
High Noise Immunity Characteristic of CMOS Devices
•
Outputs Source/Sink 24 mA
TECHNICAL DATA
IN74AC27
ORDERING INFORMATION
IN74AC27N Plastic
IN74AC27D SOIC
TA = -40° to 85° C for all
packages
LOGIC DIAGRAM
PIN 14 =V
PIN 7 = GND
CC
PIN ASSIGNMENT
FUNCTION TABLE
Inputs Output
AB C Y
HX X L
XH X L
XX H L
LL L H
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IN74AC27
MAXIMUM RATINGS
*
Symbol Parameter Value Unit
V
CC
V
V
OUT
I
IN
I
OUT
I
CC
P
DC Supply Voltage (Referenced to GND) -0.5 to +7.0 V
DC Input Voltage (Referenced to GND) -0.5 to VCC +0.5 V
IN
DC Output Voltage (Referenced to GND) -0.5 to VCC +0.5 V
DC Input Current, per Pin
DC Output Sink/Source Current, per Pin
DC Supply Current, VCC and GND Pins
Power Dissipation in Still Air, Plastic DIP+
D
SOIC Package+
±
20
±
50
±
50
750
500
Tstg Storage Temperature -65 to +150
T
Lead Temperature, 1 mm from Case for 10 Seconds
L
260
(Plastic DIP or SOIC Package)
*
Maximum Ratings are those values beyond which damage to the device may occur.
Functional operation should be restricted to the Recommended Operating Conditions.
+Derating - Plastic DIP: - 10 mW/°C from 65° to 125°C
SOIC Package: : - 7 mW/°C from 65° to 125°C
mA
mA
mA
mW
°
C
°
C
RECOMMENDED OPERATING CONDITIONS
Symbol Parameter Min Max Unit
V
CC
VIN, V
T
J
T
A
I
OH
I
OL
tr, t
f
*
VIN from 30% to 70% V
This device c ontains p rote ction ci rcuitr y to guard a gainst damage d ue to high st atic voltages or electr ic
fields. However, precautions must be taken to avoid applications of any voltage higher than maximum rated
voltages to this high-impedance circuit. For proper operation, V
GND≤(V
Unused inputs must always be tied to an appropriate logic voltage level (e.g., either GND or V
Unused outputs must be left open.
DC Supply Voltage (Referenced to GND) 2.0 6.0 V
DC Input Voltage, Output Voltage (Referenced to GND) 0 V
OUT
Junction Temperature (PDIP) 140
Operating Temperature, All Package Types -40 +85
Output Current - High -24 mA
Output Current - Low 24 mA
Input Rise and Fall Time
(except Schmitt Inputs)
IN
or V
OUT
)≤VCC.
CC
*
V
V
V
=3.0 V
CC
=4.5 V
CC
=5.5 V
CC
and V
IN
0
0
0
should be constrained to the range
OUT
150
40
25
CC
V
°
C
°
C
ns/V
CC
).
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Page 3
IN74AC27
DC ELECTRICAL CHARACTERISTICS
(Voltages Referenced to GND)
Symbol Parameter Test Conditions V
V
Minimum High-Level
IH
V
=0.1 V 3.0
OUT
Input Voltage
V
Maximum Low -
IL
V
=0.1 V or VCC-0.1 V 3.0
OUT
Level Input Voltage
V
OH
Minimum High-Level
I
OUT
≤ -50 µA
Output Voltage
*
VIN= V
IL
IOH=-12 mA
I
=-24 mA
OH
I
=-24 mA
OH
V
OL
Maximum Low-Level
I
OUT
≤ 50 µA
Output Voltage
*
VIN= VIL or V
IH
IOL=12 mA
I
=24 mA
OL
I
=24 mA
OL
I
IN
Maximum Input
VIN=VCC or GND 5.5
Leakage Current
I
OLD
+Minimum Dynamic
V
=1.65 V Max 5.5 75 mA
OLD
Output Current
I
OHD
+Minimum Dynamic
V
=3.85 V Min 5.5 -75 mA
OHD
Output Current
I
CC
Maximum Quiescent
VIN=VCC or GND 5.5 4.0 40
Supply Current
(per Package)
*
All outputs loaded; thresholds on input associated with output under test.
+Maximum test duration 2.0 ms, one output loaded at a time.
Note: I
IN
and I
@ 3.0 V are guaranteed to be less than or equal to the respective limit @ 5.5 V V
CC
V
4.5
5.5
4.5
5.5
3.0
4.5
5.5
3.0
4.5
5.5
3.0
4.5
5.5
3.0
4.5
5.5
CC
Guaranteed Limits
25 °C-40
2.1
3.15
3.85
0.9
1.35
1.65
2.9
4.4
5.4
2.56
3.86
4.86
0.1
0.1
0.1
0.36
0.36
0.36
±
0.1
°
C to
85°C
2.1
3.15
3.85
0.9
1.35
1.65
2.9
4.4
5.4
2.46
3.76
4.76
0.1
0.1
0.1
0.44
0.44
0.44
±
1.0
CC
Unit
V
V
V
V
µ
A
µ
A
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IN74AC27
AC ELECTRICAL CHARACTERISTICS
(CL=50pF,Input tr=tf=3.0 ns)
Symbol Parameter V
t
PLH
Propagation Delay, Input A or B or C to
Output Y (Figure 1)
t
PHL
Propagation Delay, Input A or B or C to
Output Y (Figure 1)
C
IN
C
PD
*
Voltage Range 3.3 V is 3.3 V ±0.3 V
Maximum Input Capacitance 5.0 4.5 4.5 pF
Power Dissipation Capacitance 25 pF
Voltage Range 5.0 V is 5.0 V ±0.5 V
*
V
CC
Guaranteed Limits
25 °C-40
Min Max Min Max
3.3
5.0
3.3
5.0
1.5
1.5
1.5
1.5
9.5
8.0
9.5
8.0
Typical @25°C,VCC=5.0 V
1.0
1.0
1.0
1.0
°
C to
85°C
10.0
8.5
10.0
8.5
Unit
ns
ns
78
Figure 1. Switching Waveforms
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