SN54HCT14, SN74HCT14
HEX SCHMITT-TRIGGER INVERTERS
SCLS225C JULY 1995 REVISED FEBRUARY 2000
1
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
D
Inputs Are TTL-Voltage Compatible
D
Package Options Include Plastic
Small-Outline (D), Shrink Small-Outline
(DB), Thin Very Small-Outline (DGV), Thin
Shrink Small-Outline (PW), and Ceramic
Flat (W) Packages, Ceramic Chip Carriers
(FK), and Standard Plastic (N) and Ceramic
(J) DIPs
description
The 'HCT14 devices contain six independent
inverters. The devices perform the Boolean
function Y = A in positive logic.
The SN54HCT14 is characterized for operation
over the full military temperature range of 55
C
to 125
C. The SN74HCT14 is characterized for
operation from 40
C to 85
C.
FUNCTION TABLE
(each inverter)
INPUT
A
OUTPUT
Y
H
L
L
H
logic symbol
1
1A
3
2A
1Y
2
5
3A
9
4A
2Y
4
11
5A
13
6A
3Y
6
4Y
8
5Y
10
6Y
12
This symbol is in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12.
Pin numbers shown are for the D, DB, DGV, J, N, PW, and W packages.
logic diagram (positive logic)
A
Y
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.
1
2
3
4
5
6
7
14
13
12
11
10
9
8
1A
1Y
2A
2Y
3A
3Y
GND
V
CC
6A
6Y
5A
5Y
4A
4Y
SN54HCT14 . . . J OR W PACKAGE
SN74HCT14 . . . D, DB, DGV, N, OR PW PACKAGE
(TOP VIEW)
3
2 1 20 19
9 10 11 12 13
4
5
6
7
8
18
17
16
15
14
6Y
NC
5A
NC
5Y
2A
NC
2Y
NC
3A
1Y
1A
NC
4Y
4A
V
6A
3Y
GND
NC
SN54HCT14 . . . FK PACKAGE
(TOP VIEW)
CC
NC No internal connection
Copyright
2000, Texas Instruments Incorporated
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
On products compliant to MIL-PRF-38535, all parameters are tested
unless otherwise noted. On all other products, production
processing does not necessarily include testing of all parameters.
SN54HCT14, SN74HCT14
HEX SCHMITT-TRIGGER INVERTERS
SCLS225C JULY 1995 REVISED FEBRUARY 2000
2
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
absolute maximum ratings over operating free-air temperature range
Supply voltage range, V
CC
0.5 V to 7 V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Input voltage range, V
I
(see Note 1)
0.5 V to V
CC
+0.5 V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Output voltage range, V
O
(see Note 1)
0.5 V to V
CC
+0.5 V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Input clamp current, I
IK
(V
I
< 0 or V
I
> V
CC
)
20 mA
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Output clamp current, I
OK
(V
O
< 0 or V
O
> V
CC
)
20 mA
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Continuous output current, I
O
(V
O
= 0 to V
CC
)
25 mA
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Continuous current through V
CC
or GND
50 mA
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Package thermal impedance,
JA
(see Note 2): D package
86
C/W
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DB package
96
C/W
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DGV package
127
C/W
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
N package
80
C/W
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PW package
113
C/W
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Storage temperature range, T
stg
65
C to 150
C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Stresses beyond those listed under "absolute maximum ratings" may cause permanent damage to the device. These are stress ratings only, and
functional operation of the device at these or any other conditions beyond those indicated under "recommended operating conditions" is not
implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
NOTES:
1. The input and output voltage ratings may be exceeded if the input and output current ratings are observed.
2. The package thermal impedance is calculated in accordance with JESD 51.
recommended operating conditions (see Note 3)
SN54HCT14
SN74HCT14
UNIT
MIN
MAX
MIN
MAX
UNIT
VCC
Supply voltage
4.5
5.5
4.5
5.5
V
VI
Input voltage
0
VCC
0
VCC
V
VO
Output voltage
0
VCC
0
VCC
V
TA
Operating free-air temperature
55
125
40
85
C
NOTE 3: All unused inputs of the device must be held at VCC or GND to ensure proper device operation. Refer to the TI application report,
Implications of Slow or Floating CMOS Inputs, literature number SCBA004.
SN54HCT14, SN74HCT14
HEX SCHMITT-TRIGGER INVERTERS
SCLS225C JULY 1995 REVISED FEBRUARY 2000
3
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
PARAMETER
TEST CONDITIONS
VCC
TA = 25
C
SN54HCT14
SN74HCT14
UNIT
PARAMETER
TEST CONDITIONS
VCC
MIN
TYP
MAX
MIN
MAX
MIN
MAX
UNIT
VT+
Positive going
4.5 V
1.2
1.5
1.9
1.2
1.9
1.2
1.9
V
Positive-going
threshold
5.5 V
1.4
1.7
2.1
1.4
2.1
1.4
2.1
V
VT
Negative going
4.5 V
0.5
0.9
1.2
0.5
1.2
0.5
1.2
V
Negative-going
threshold
5.5 V
0.6
1
1.4
0.6
1.4
0.6
1.4
V
VT
Hysteresis
4.5 V
0.4
0.6
1.4
0.4
1.4
0.4
1.4
V
Hysteresis
(VT+ VT)
5.5 V
0.4
0.65
1.5
0.4
1.5
0.4
1.5
V
VOH
IOH = 20
A
4.5 V
4.4
4.49
4.4
4.4
V
VOH
IOH = 4 mA
4.5 V
3.98
4.3
3.7
3.84
V
VOL
IOL = 20
A
4.5 V
0.001
0.1
0.1
0.1
V
VOL
IOL = 4 mA
4.5 V
0.17
0.26
0.4
0.33
V
II
VI = VCC or GND
5.5 V
0.1
1
1
A
ICC
VI = VCC or GND,
IO = 0
5.5 V
2
40
20
A
ICC
One input at 0.5 V or 2.4 V,
Other inputs at GND or VCC
5.5 V
0.2
2.4
3
2.9
mA
Ci
VI = VCC or GND
5 V
3
10
10
10
pF
This is the increase in supply current for each input that is at one of the specified TTL voltage levels rather than 0 V or VCC.
switching characteristics over recommended operating free-air temperature range, C
L
= 50 pF
(unless otherwise noted) (see Figure 1)
PARAMETER
FROM
TO
VCC
TA = 25
C
SN54HCT14
SN74HCT14
UNIT
PARAMETER
(INPUT)
(OUTPUT)
VCC
MIN
TYP
MAX
MIN
MAX
MIN
MAX
UNIT
t d
A
Y
4.5 V
20
32
48
40
ns
tpd
A
Y
5.5 V
18
30
45
38
ns
tt
Y
4.5 V
7
15
22
19
ns
tt
Y
5.5 V
6
14
20
17
ns
operating characteristics, T
A
= 25
C
PARAMETER
TEST CONDITIONS
TYP
UNIT
Cpd
Power dissipation capacitance
No load
10
pF
SN54HCT14, SN74HCT14
HEX SCHMITT-TRIGGER INVERTERS
SCLS225C JULY 1995 REVISED FEBRUARY 2000
4
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
PARAMETER MEASUREMENT INFORMATION
VOLTAGE WAVEFORM
INPUT RISE AND FALL TIMES
VOLTAGE WAVEFORMS
PROPAGATION DELAY AND OUTPUT RISE AND FALL TIMES
1.3 V
1.3 V
1.3 V
10%
10%
90%
90%
3 V
VOH
VOL
0 V
tr
tf
Input
In-Phase
Output
1.3 V
tPLH
tPHL
1.3 V
1.3 V
10%
10%
90%
90%
VOH
VOL
tr
tf
tPHL
tPLH
Out-of-Phase
Output
Test
Point
From Output
Under Test
LOAD CIRCUIT
NOTES: A. CL includes probe and test-fixture capacitance.
B. Phase relationships between waveforms were chosen arbitrarily. All input pulses are supplied by generators having the following
characteristics: PRR
1 MHz, ZO = 50
, tr = 6 ns, tf = 6 ns.
C. The outputs are measured one at a time with one input transition per measurement.
D. tPLH and tPHL are the same as tpd.
CL = 50 pF
(see Note A)
1.3 V
1.3 V
10%
10%
90%
90%
VCC
0 V
tr
tf
Input
Figure 1. Load Circuit and Voltage Waveforms
SN54HCT14, SN74HCT14
HEX SCHMITT-TRIGGER INVERTERS
SCLS225C JULY 1995 REVISED FEBRUARY 2000
5
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
TYPICAL CHARACTERISTICS
0.25
0.2
0.1
0.05
0
0.45
0.15
0
0.45
0.9 1.35
1.8
2.26
2.7
Supply Current mA
0.35
0.3
0.4
SUPPLY CURRENT
vs
INPUT VOLTAGE
0.5
3.16 3.61
4
VI Input Voltage V
I CC
VI = 0 to VCC
VI = VCC to 0
VCC = 4.5 V
0.25
0.2
0.1
0.05
0
0.45
0.15
0
0.55
1.1 1.66
2.2
2.76
3.3
Supply Current mA
0.35
0.3
0.4
SUPPLY CURRENT
vs
INPUT VOLTAGE
0.5
3.86 4.4 4.97
VI Input Voltage V
I CC
VI = 0 to VCC
VI = VCC to 0
VCC = 5.5 V
0
0.75
1.5
2.27
Output V
oltage V
OUTPUT VOLTAGE
vs
INPUT VOLTAGE
3
3.77
6
5
4
3
2
1
0
1
V
O
VI Input Voltage V
VI = Down
VI = Up
VCC = 4.5 V
0
0.92
1.84
2.76
Output V
oltage V
OUTPUT VOLTAGE
vs
INPUT VOLTAGE
3.68
4.6
6
5
4
3
2
1
0
1
V
O
VI Input Voltage V
VI = Down
VI = Up
VCC = 5.5 V
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pertaining to warranty, patent infringement, and limitation of liability.
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accordance with TI's standard warranty. Testing and other quality control techniques are utilized to the extent
TI deems necessary to support this warranty. Specific testing of all parameters of each device is not necessarily
performed, except those mandated by government requirements.
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DEATH, PERSONAL INJURY, OR SEVERE PROPERTY OR ENVIRONMENTAL DAMAGE ("CRITICAL
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Copyright
2000, Texas Instruments Incorporated
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