TECHNICAL DATA
IN74AC14
Hex Schmitt-Trigger Inverter
High-Speed Silicon-Gate CMOS
The IN74AC14 is identical in pinout to the LS/ALS14, HC/HCT14.
The device inputs are compatible with standard CMOS outputs; with
pullup resistors, they are compatible with LS/ALS outputs.
The IN74AC14 is useful to “square up” slow input rise and fall
times. Due to the hysteresis voltage of the Schmitt trigger, the
IN74AC14 finds applications in noisy environments.
•
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
ORDERING INFORMATION
IN74AC14N Plastic
IN74AC14D SOIC
T
A
= -40° to 85° C for all
packages
LOGIC DIAGRAM
PIN ASSIGNMENT
FUNCTION TABLE
Inputs
A
L
H
PIN 14 =V
CC
PIN 7 = GND
Output
Y
H
L
51
IN74AC14
MAXIMUM RATINGS
*
Symbol
V
CC
V
IN
V
OUT
I
IN
I
OUT
I
CC
P
D
Tstg
T
L
*
Parameter
DC Supply Voltage (Referenced to GND)
DC Input Voltage (Referenced to GND)
DC Output Voltage (Referenced to GND)
DC Input Current, per Pin
DC Output Sink/Source Current, per Pin
DC Supply Current, V
CC
and GND Pins
Power Dissipation in Still Air, Plastic DIP+
SOIC Package+
Storage Temperature
Lead Temperature, 1 mm from Case for 10 Seconds
(Plastic DIP or SOIC Package)
Value
-0.5 to +7.0
-0.5 to V
CC
+0.5
-0.5 to V
CC
+0.5
±20
±50
±50
750
500
-65 to +150
260
Unit
V
V
V
mA
mA
mA
mW
°C
°C
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
RECOMMENDED OPERATING CONDITIONS
Symbol
V
CC
V
IN
, V
OUT
T
J
T
A
I
OH
I
OL
t
r
, t
f
Parameter
DC Supply Voltage (Referenced to GND)
DC Input Voltage, Output Voltage (Referenced to GND)
Junction Temperature (PDIP)
Operating Temperature, All Package Types
Output Current - High
Output Current - Low
Input Rise and Fall Time
*
(except Schmitt Inputs)
V
CC
=3.0 V
V
CC
=4.5 V
V
CC
=5.5 V
0
0
0
-40
Min
2.0
0
Max
6.0
V
CC
140
+85
-24
24
150
40
25
Unit
V
V
°C
°C
mA
mA
ns/V
*
V
IN
from 30% to 70% V
CC
This device contains protection circuitry to guard against damage due to high static voltages or electric
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
IN
and V
OUT
should be constrained to the range
GND≤(V
IN
or V
OUT
)≤V
CC
.
Unused inputs must always be tied to an appropriate logic voltage level (e.g., either GND or V
CC
).
Unused outputs must be left open.
52
IN74AC14
DC ELECTRICAL CHARACTERISTICS
(Voltages Referenced to GND)
V
CC
Symbol
V
OH
Parameter
Minimum High-Level
Output Voltage
Test Conditions
I
OUT
≤
-50
µA
V
3.0
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
3.0
4.5
5.5
3.0
4.5
5.5
3.0
4.5
5.5
5.5
5.5
5.5
5.5
4.0
±0.1
Guaranteed Limits
25
°C
2.9
4.4
5.4
2.56
3.86
4.86
0.1
0.1
0.1
0.36
0.36
0.36
2.2
3.2
3.9
0.5
0.9
1.1
1.2
1.4
1.6
0.3
0.4
0.5
±1.0
75
-75
40
-40°C to
85°C
2.9
4.4
5.4
2.46
3.76
4.76
0.1
0.1
0.1
0.44
0.44
0.44
V
V
Unit
V
V
IN
≤
V
T
- min
I
OH
=-12 mA
I
OH
=-24 mA
I
OH
=-24 mA
*
V
OL
Maximum Low-Level
Output Voltage
I
OUT
≤
50
µA
V
IN
=≥ V
T
+max
I
OL
=12 mA
I
OL
=24 mA
I
OL
=24 mA
V
T
+max
Maximum Positive-
Going Input Threshold
Voltage
Minimum Negative-
Going Input Threshold
Voltage
Maximum Hysteresis
Voltage
Minimum Hysteresis
Voltage
Maximum Input
Leakage Current
+Minimum Dynamic
Output Current
+Minimum Dynamic
Output Current
Maximum Quiescent
Supply Current
(per Package)
V
OUT
=0.1 V
T
A
= Worst Case
V
OUT
= V
CC
- 0.1 V
T
A
= Worst Case
V
OUT
=0.1 V or V
CC
- 0.1 V
T
A
= Worst Case
V
OUT
=0.1 V or V
CC
- 0.1 V
T
A
= Worst Case
V
IN
=V
CC
or GND
V
OLD
=1.65 V Max
V
OHD
=3.85 V Min
V
IN
=V
CC
or GND
*
V
T
- min
V
V
H
max
V
V
H
min
V
I
IN
I
OLD
I
OHD
I
CC
µA
mA
mA
µA
All outputs loaded; thresholds on input associated with output under test.
+Maximum test duration 2.0 ms, one output loaded at a time.
Notes:1. I
IN
and I
CC
@ 3.0 V are guaranteed to be less than or equal to the respective limit @ 5.5 V V
CC
2. V
H
=(V
T
+)-(V
T
-)
.
*
53
IN74AC14
AC ELECTRICAL CHARACTERISTICS
(C
L
=50pF,Input t
r
=t
f
=3.0 ns)
V
CC*
Symbol
Parameter
V
Guaranteed Limits
25
°C
Min
t
PLH
t
PHL
C
IN
Propagation Delay, Input A to Output Y
(Figure 1)
Propagation Delay, Input A to Output Y
(Figure 1)
Maximum Input Capacitance
3.3
5.0
3.3
5.0
5.0
1.5
1.5
1.5
1.5
4.5
Max
13.5
10.0
11.5
8.5
-40°C to
85°C
Min
1.5
1.5
1.5
1.5
4.5
Max
15.0
11.0
13.0
9.5
ns
ns
pF
Unit
Typical @25°C,V
CC
=5.0 V
C
PD
*
Power Dissipation Capacitance
25
pF
Voltage Range 3.3 V is 3.3 V
±0.3
V
Voltage Range 5.0 V is 5.0 V
±0.5
V
Figure 1. Switching Waveforms
54
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