74AC14 • 74ACT14 Hex Inverter with Schmitt Trigger Input
November 1988
Revised December 1999
74AC14 • 74ACT14
Hex Inverter with Schmitt Trigger Input
General Description
The 74AC14 and 74ACT14 contain six inverter gates each
with a Schmitt trigger input. They are capable of transform-
ing slowly changing input signals into sharply defined, jitter-
free output signals. In addition, they have a greater noise
margin than conventional inverters.
The 74AC14 and 74ACT14 have hysteresis between the
positive-going and negative-going input thresholds (typi-
cally 1.0V) which is determined internally by transistor
ratios and is essentially insensitive to temperature and sup-
ply voltage variations.
Features
s
I
CC
reduced by 50%
s
Outputs source/sink 24 mA
s
74ACT14 has TTL-compatible inputs
Ordering Code:
Order Number
74AC14SC
74AC14SJ
74AC14MTC
74AC14PC
74ACT14SC
74ACT14MTC
74ACT14PC
Package Number
M14A
M14D
MTC14
N14A
M14A
MTC14
N14A
Package Description
14-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150” Narrow Body
14-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide
14-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MS-153, 4.4mm Wide
14-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300” Wide
14-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150” Narrow Body
14-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MS-153, 4.4mm Wide
14-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300” Wide
Device also available in Tape and Reel. Specify by appending suffix letter “X” to the ordering code.
Logic Symbol
IEEE/IEC
Connection Diagram
Function Table
Pin Descriptions
Pin Names
I
n
O
n
Description
Inputs
Outputs
Input
A
L
H
Output
O
H
L
FACT is a trademark of Fairchild Semiconductor Corporation.
© 1999 Fairchild Semiconductor Corporation
DS009917
www.fairchildsemi.com
74AC14 • 74ACT14
Absolute Maximum Ratings
(Note 1)
Supply Voltage (V
CC
)
DC Input Diode Current (I
IK
)
V
I
= −0.5V
V
I
=
V
CC
+
0.5V
DC Input Voltage (V
I
)
DC Output Diode Current (I
OK
)
V
O
= −0.5V
V
O
=
V
CC
+
0.5V
DC Output Voltage (V
O
)
DC Output Source
or Sink Current (I
O
)
DC V
CC
or Ground Current
per Output Pin (I
CC
or I
GND
)
Storage Temperature (T
STG
)
Junction Temperature (T
J
)
PDIP
140°C
±50
mA
−65°C
to
+150°C
±50
mA
−20
mA
+20
mA
−0.5V
to V
CC
+
0.5V
−20
mA
+20
mA
−0.5V
to V
CC
+
0.5V
−0.5V
to
+7.0V
Recommended Operating
Conditions
Supply Voltage (V
CC
)
AC
ACT
Input Voltage (V
I
)
Output Voltage (V
O
)
Operating Temperature (T
A
)
2.0V to 6.0V
4.5V to 5.5V
0V to V
CC
0V to V
CC
−40°C
to
+85°C
Note 1:
Absolute maximum ratings are those values beyond which damage
to the device may occur. The databook specifications should be met, with-
out exception, to ensure that the system design is reliable over its power
supply, temperature, and output/input loading variables. Fairchild does not
recommend operation of FACT circuits outside databook specifications.
DC Electrical Characteristics for AC
Symbol
V
OH
Parameter
Minimum HIGH Level
Output Voltage
V
CC
(V)
3.0
4.5
5.5
3.0
4.5
5.5
V
OL
Maximum LOW Level
Output Voltage
3.0
4.5
5.5
3.0
4.5
5.5
I
IN
(Note 4) Maximum Input Leakage Current
V
t+
Maximum Positive
Threshold
V
t−
Minimum Negative
Threshold
V
H(MAX)
Maximum Hysteresis
5.5
3.0
4.5
5.5
3.0
4.5
5.5
3.0
4.5
5.5
V
H(MIN)
Minimum Hysteresis
3.0
4.5
5.5
I
OLD
I
OHD
I
CC
(Note 4)
Minimum Dynamic
Output Current (Note 3)
Maximum Quiescent
Supply Current
5.5
5.5
5.5
2.0
0.002
0.001
0.001
T
A
= +25°C
Typ
2.99
4.49
5.49
4.4
5.4
2.56
3.86
4.86
0.1
0.1
0.1
0.36
0.36
0.36
±0.1
2.2
3.2
3.9
0.5
0.9
1.1
1.2
1.4
1.6
0.3
0.4
0.5
2.9
T
A
= −40°C
to
+85°C
Guaranteed Limits
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
2.2
3.2
3.9
0.5
0.9
1.1
1.2
1.4
1.6
0.3
0.4
0.5
75
−75
20.0
mA
mA
µA
V
OLD
=
1.65V Max
V
OHD
=
3.85V Min
V
IN
=
V
CC
or GND
V
T
A
=
Worst Case
V
T
A
=
Worst Case
V
T
A
=
Worst Case
V
T
A
=
Worst Case
µA
V
I
OL
=
12
I
OL
24 mA
I
OL
=
24 mA (Note 2)
V
I
=
V
CC
, GND
V
I
OUT
=
50
µA
V
I
OH
=
12
I
OH
=
24 mA
I
OH
=
24 mA (Note 2)
V
I
OUT
= −50 µA
Units
Conditions
Note 2:
All outputs loaded; thresholds on input associated with output under test.
Note 3:
Maximum test duration 2.0 ms, one output loaded at a time.
Note 4:
I
IN
and I
CC
@ 3.0V are guaranteed to be less than or equal to the respective limit @ 5.5V V
CC
.
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2
74AC14 • 74ACT14
AC Electrical Characteristics for AC
V
CC
Symbol
Parameter
(V)
(Note 5)
t
PLH
t
PHL
Propagation Delay
Propagation Delay
3.3
5.0
3.3
5.0
Note 5:
Voltage Range 3.3 is 3.3V
±
0.3V
Voltage Range 5.0 is 5.0V
±
0.5V
T
A
= +25°C
C
L
=
50 pF
Min
1.5
1.5
1.5
1.5
Typ
9.5
7.0
7.5
6.0
Max
13.5
10.0
11.5
8.5
T
A
= −40°C
to
+85°C
C
L
=
50 pF
Min
1.5
1.5
1.5
1.5
Max
15.0
11.0
13.0
9.5
ns
ns
Units
DC Electrical Characteristics for ACT
Symbol
V
IH
V
IL
V
OH
Parameter
Minimum HIGH Level
Input Voltage
Maximum LOW Level
Output Voltage
Minimum HIGH Level
Output Voltage
V
CC
(V)
4.5
5.5
4.5
5.5
4.5
5.5
4.5
5.5
V
OL
Maximum LOW Level
Output Voltage
4.5
5.5
4.5
5.5
I
IN
V
H(MAX)
V
H(MIN)
V
t+
V
t−
I
CCT
I
OLD
I
OHD
I
CC
Maximum Input Leakage Current
Maximum Hysteresis
Minimum Hysteresis
Maximum Positive
Threshold
Minimum Negative
Threshold
Maximum I
CC
/Input
Minimum Dynamic
Output Current (Note 7)
Maximum Quiescent
Supply Current
5.5
4.5
5.5
4.5
5.5
4.5
5.5
4.5
5.5
5.5
5.5
5.5
5.5
2.0
0.6
0.001
0.001
T
A
= +25°C
Typ
1.5
1.5
1.5
1.5
4.49
5.49
2.0
2.0
0.8
0.8
434
5.4
3.86
4.86
0.1
0.1
0.36
0.36
±0.1
1.4
1.6
0.4
0.5
2.0
2.0
0.8
0.8
T
A
= −40°C
to
+85°C
Guaranteed Limits
2.0
2.0
0.8
0.8
4.4
5.4
3.76
4.76
0.1
0.1
0.44
0.44
±1.0
1.4
1.6
0.4
0.5
2.0
2.0
0.8
0.8
1.5
75
−75
20.0
µA
V
V
V
V
mA
mA
mA
µA
V
Units
V
V
V
Conditions
V
OUT
=
0.1V
or V
CC
−
0.1V
V
OUT
=
0.1V
or V
CC
−
0.1V
I
OUT
= −50µA
V
IN
=
V
IL
or V
IH
V
I
OH
= −24
mA
I
OH
= −24
mA (Note 6)
I
OUT
=
50
µA
V
IN
=
V
IL
or V
IH
V
I
OL
=
24 mA
I
OL
=
24 mA (Note 6)
V
I
=
V
CC
, GND
T
A
=
Worst Case
T
A
=
Worst Case
T
A
=
Worst Case
T
A
=
Worst Case
V
I
=
V
CC
−
2.1V
V
OLD
=
1.65V Max
V
OHD
=
3.85V Min
V
IN
=
V
CC
or GND
Note 6:
All outputs loaded; thresholds on input associated with output under test.
Note 7:
Maximum test duration 2.0 ms, one output loaded at a time.
3
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