SN54AC14, SN74AC14
HEX SCHMITT TRIGGER INVERTERS
SCAS522F - AUGUST 1995 - REVISED OCTOBER 2003
1
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
D
2-V to 6-V V
CC
Operation
D
Inputs Accept Voltages to 6 V
D
Max t
pd
of 9.5 ns at 5 V
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
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
SN54AC14 . . . FK PACKAGE
(TOP VIEW)
1Y
A1
NC
4Y
4A
V
6A
3Y
GND
NC
NC - No internal connection
CC
SN54AC14 . . . J OR W PACKAGE
SN74AC14 . . . D, DB, N, NS, OR PW PACKAGE
(TOP VIEW)
description/ordering information
These Schmitt-trigger devices contain six independent inverters. They perform the Boolean function Y = A.
Because of the Schmitt action, they have different input threshold levels for positive-going (V
T+
) and for
negative-going (V
T-
) signals.
These circuits are temperature compensated and can be triggered from the slowest of input ramps and still give
clean, jitter-free output signals. They also have a greater noise margin than conventional inverters.
ORDERING INFORMATION
TA
PACKAGE
ORDERABLE
PART NUMBER
TOP-SIDE
MARKING
PDIP - N
Tube
SN74AC14N
SN74AC14N
SOIC - D
Tube
SN74AC14D
AC14
SOIC - D
Tape and reel
SN74AC14DR
AC14
-40
C to 85
C
SOP - NS
Tape and reel
SN74AC14NSR
AC14
-40 C to 85 C
SSOP - DB
Tape and reel
SN74AC14DBR
AC14
TSSOP - PW
Tube
SN74AC14PW
AC14
TSSOP - PW
Tape and reel
SN74AC14PWR
AC14
CDIP - J
Tube
SNJ54AC14J
SNJ54AC14J
-55
C to 125
C
CFP - W
Tube
SNJ54AC14W
SNJ54AC14W
-55 C to 125 C
LCCC - FK
Tube
SNJ54AC14FK
SNJ54AC14FK
Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are
available at www.ti.com/sc/package.
Copyright
2003, 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.
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.
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.
SN54AC14, SN74AC14
HEX SCHMITT TRIGGER INVERTERS
SCAS522F - AUGUST 1995 - REVISED OCTOBER 2003
2
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
FUNCTION TABLE
(each inverter)
INPUT
OUTPUT
INPUT
A
OUTPUT
Y
H
L
L
H
logic diagram, each inverter (positive logic)
A
Y
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
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
)
50 mA
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Continuous current through V
CC
or GND
200 mA
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Package thermal impedance,
JA
(see Note 2): D package
86
C/W
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DB package
96
C/W
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
N package
80
C/W
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
NS package
76
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 51-7.
recommended operating conditions (see Note 3)
SN54AC14
SN74AC14
UNIT
MIN
MAX
MIN
MAX
UNIT
VCC
Supply voltage
2
6
2
6
V
VI
Input voltage
0
VCC
0
VCC
V
VO
Output voltage
0
VCC
0
VCC
V
VCC = 3 V
-12
-12
IOH
High-level output current
VCC = 4.5 V
-24
-24
mA
IOH
High-level output current
VCC = 5.5 V
-24
-24
mA
VCC = 3 V
12
12
IOL
Low-level output current
VCC = 4.5 V
24
24
mA
IOL
Low-level output current
VCC = 5.5 V
24
24
mA
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.
SN54AC14, SN74AC14
HEX SCHMITT TRIGGER INVERTERS
SCAS522F - AUGUST 1995 - REVISED OCTOBER 2003
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
SN54AC14
SN74AC14
UNIT
PARAMETER
TEST CONDITIONS
VCC
MIN
TYP
MAX
MIN
MAX
MIN
MAX
UNIT
VT+
3 V
0.8
1.8
2.2
0.8
2.2
0.8
2.2
VT+
Positive-going
threshold
4.5 V
1.5
2.6
3.2
1.5
3.2
1.5
3.2
V
Positive-going
threshold
5.5 V
1.6
3.2
3.9
1.6
3.9
1.6
3.9
V
VT-
3 V
0.5
0.8
1
0.5
1
0.5
1
VT-
Negative-going
threshold
4.5 V
0.9
1.4
1.8
0.9
1.8
0.9
1.8
V
Negative-going
threshold
5.5 V
1.1
1.8
2.3
1.1
2.3
1.1
2.3
V
VT
3 V
0.3
1
1.2
0.3
1.2
0.3
1.2
VT
Hysteresis
(V
- V
)
4.5 V
0.4
1.2
1.4
0.4
1.4
0.4
1.4
V
Hysteresis
(VT+ - VT-)
5.5 V
0.5
1.4
1.6
0.5
1.6
0.5
1.6
V
3 V
2.9
2.9
2.9
IOH = -50
A
4.5 V
4.4
4.4
4.4
IOH = -50
A
5.5 V
5.4
5.4
5.4
VOH
IOH = -12 mA
3 V
2.56
2.4
2.48
V
VOH
IOH = -24 mA
4.5 V
3.86
3.7
3.8
V
IOH = -24 mA
5.5 V
4.86
4.7
4.8
IOH = -50 mA
5.5 V
3.85
IOH = -75 mA
5.5 V
3.85
3 V
0.002
0.1
0.1
0.1
IOL = 50
A
4.5 V
0.001
0.1
0.1
0.1
IOL = 50
A
5.5 V
0.001
0.1
0.1
0.1
VOL
IOL = 12 mA
3 V
0.36
0.5
0.44
V
VOL
IOL = 24 mA
4.5 V
0.36
0.5
0.44
V
IOL = 24 mA
5.5 V
0.36
0.5
0.44
IOL = 50 mA
5.5 V
1.65
IOL = 75 mA
5.5 V
1.65
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
Ci
VI = VCC or GND
5 V
4.5
pF
Not more than one output should be tested at a time, and the duration of the test should not exceed 10 ms.
switching characteristics over recommended operating free-air temperature range,
V
CC
= 3.3 V
"
0.3 V (unless otherwise noted) (see Figure 1)
PARAMETER
FROM
TO
TA = 25
C
SN54AC14
SN74AC14
UNIT
PARAMETER
FROM
(INPUT)
TO
(OUTPUT)
MIN
TYP
MAX
MIN
MAX
MIN
MAX
UNIT
tPLH
A
Y
1.5
6
13.5
1
16
1.5
15
ns
tPHL
A
Y
1.5
6
11.5
1
14
1.5
13
ns
SN54AC14, SN74AC14
HEX SCHMITT TRIGGER INVERTERS
SCAS522F - AUGUST 1995 - REVISED OCTOBER 2003
4
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
switching characteristics over recommended operating free-air temperature range,
V
CC
= 5 V
"
0.5 V (unless otherwise noted) (see Figure 1)
PARAMETER
FROM
TO
TA = 25
C
SN54AC14
SN74AC14
UNIT
PARAMETER
FROM
(INPUT)
TO
(OUTPUT)
MIN
TYP
MAX
MIN
MAX
MIN
MAX
UNIT
tPLH
A
Y
1.5
5
10
1.5
12
1.5
11
ns
tPHL
A
Y
1.5
5
8.5
1.5
10
1.5
9.5
ns
operating characteristics, V
CC
= 5 V, T
A
= 25
C
PARAMETER
TEST CONDITIONS
TYP
UNIT
Cpd
Power dissipation capacitance
CL = 50 pF,
f = 1 MHz
25
pF
PARAMETER MEASUREMENT INFORMATION
S1
TEST
tPLH/tPHL
Open
50% VCC
tPLH
tPHL
tPHL
tPLH
VOH
VOH
VOL
VOL
50% VCC
50% VCC
VCC
0 V
50% VCC
50% VCC
Input
(see Note B)
Out-of-Phase
Output
In-Phase
Output
50% VCC
VOLTAGE WAVEFORMS
From Output
Under Test
CL = 50 pF
(see Note A)
LOAD CIRCUIT
S1
2
VCC
500
500
OPEN
NOTES: A. CL includes probe and jig capacitance.
B. All input pulses are supplied by generators having the following characteristics: PRR
1 MHz, ZO = 50
, tr
v
2.5 ns, tf
v
2.5 ns.
C. The outputs are measured one at a time with one input transition per measurement.
Figure 1. Load Circuit and Voltage Waveforms
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