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SN54ACT14, SN74ACT14
HEX SCHMITT TRIGGER INVERTER
SCAS557H − DECEMBER 1995 − REVISED NOVEMBER 2004
D
4.5-V to 5.5-V V
CC
Operation
D
Inputs Accept Voltages to 5.5 V
SN54ACT14 . . . J OR W PACKAGE
SN74ACT14 . . . D, DB, N, NS. OR PW PACKAGE
(TOP VIEW)
D
Max t
pd
of 11 ns at 5 V
D
Inputs Are TTL-Voltage Compatible
SN54ACT14 . . . FK PACKAGE
(TOP VIEW)
1A
1Y
2A
2Y
3A
3Y
GND
1
2
3
4
5
6
7
14
13
12
11
10
9
8
V
CC
6A
6Y
5A
5Y
4A
4Y
1Y
1A
NC
V
CC
6A
2A
NC
2Y
NC
3A
4
5
6
7
8
3 2 1 20 19
18
17
16
15
14
9 10 11 12 13
6Y
NC
5A
NC
5Y
NC − No internal connection
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
PDIP − N
SOIC − D
−40°C to 85 C
−40 C 85°C
SOP − NS
SSOP − DB
TSSOP − PW
CDIP − J
−55°C to 125 C
−55 C 125°C
CFP − W
LCCC − FK
PACKAGE†
Tube
Tube
Tape and reel
Tape and reel
Tape and reel
Tube
Tape and reel
Tube
Tube
Tube
ORDERABLE
PART NUMBER
SN74ACT14N
SN74ACT14D
SN74ACT14DR
SN74ACT14NSR
SN74ACT14DBR
SN74ACT14PW
SN74ACT14PWR
SNJ54ACT14J
SNJ54ACT14W
SNJ54ACT14FK
AD14
SNJ54ACT14J
SNJ54ACT14W
SNJ54ACT14FK
ACT14
ACT14
AD14
TOP-SIDE
MARKING
SN74ACT14N
† Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are
available at www.ti.com/sc/package.
FUNCTION TABLE
(each inverter)
INPUT
A
H
L
OUTPUT
Y
L
H
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.
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.
Copyright
2004, Texas Instruments Incorporated
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3Y
GND
NC
4Y
4A
1
SN54ACT14, SN74ACT14
HEX SCHMITT TRIGGER INVERTER
SCAS557H − DECEMBER 1995 − REVISED NOVEMBER 2004
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,
θ
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)
SN54ACT14
MIN
VCC
VI
VO
IOH
IOL
TA
Supply voltage
Input voltage
Output voltage
High-level output current
Low-level output current
Operating free-air temperature
−55
4.5
0
0
MAX
5.5
VCC
VCC
−24
24
125
−40
SN74ACT14
MIN
4.5
0
0
MAX
5.5
VCC
VCC
−24
24
85
UNIT
V
V
V
mA
mA
°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.
2
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SN54ACT14, SN74ACT14
HEX SCHMITT TRIGGER INVERTER
SCAS557H − DECEMBER 1995 − REVISED NOVEMBER 2004
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
PARAMETER
VT+
Positive-going threshold
VT−
Negative-going threshold
∆V
T
Hysteresis (VT+ − VT−)
IOH = −50
µA
A
VOH
IOH = −24 mA
IOH = −50 mA†
IOH = −75 mA†
IOL = 50
µA
A
VOL
IOL = 24 mA
IOL = 50 mA†
IOL = 75 mA†
II
ICC
∆I
CC‡
Ci
VI = VCC or GND
VI = VCC or GND,
IO = 0
TEST CONDITIONS
VCC
4.5 V
5.5 V
4.5 V
5.5 V
4.5 V
5.5 V
4.5 V
5.5 V
4.5 V
5.5 V
5.5 V
5.5 V
4.5 V
5.5 V
4.5 V
5.5 V
5.5 V
5.5 V
5.5 V
5.5 V
5.5 V
0.6
±0.1
2
±1
40
1.6
0.001
0.001
0.1
0.1
0.36
0.36
0.1
0.1
0.5
0.5
1.65
1.65
±1
20
1.5
µA
µA
mA
pF
TA = 25°C
MIN
TYP
MAX
1.2
1.4
0.5
0.6
0.4
0.4
4.4
5.4
3.86
4.86
1.5
1.7
0.9
1
0.6
0.6
4.49
5.49
1.9
2.1
1.2
1.4
1.4
1.5
SN54ACT14
MIN
1.2
1.4
0.5
0.6
0.4
0.4
4.4
5.4
3.7
4.7
3.85
3.85
0.1
0.1
0.44
0.44
V
MAX
1.9
2.1
1.2
1.4
1.4
1.5
SN74ACT14
MIN
1.2
1.4
0.5
0.6
0.4
0.4
4.4
5.4
3.76
4.76
V
MAX
1.9
2.1
1.2
1.4
1.4
1.5
V
V
V
UNIT
One input at 3.4 V,
Other inputs at GND or VCC
VI = VCC or GND
5V
4.5
† Not more than one output should be tested at a time, and the duration of the test should not exceed 2 ms.
‡ 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,
V
CC
= 5 V
±
0.5 V (unless otherwise noted) (see Figure 1)
PARAMETER
tPLH
tPHL
FROM
(INPUT)
A
TO
(OUTPUT)
Y
TA = 25°C
MIN
MAX
1.5
1.5
11.5
10
SN54ACT14
MIN
1
1
MAX
14
13
SN74ACT14
MIN
1
1
MAX
12.5
11
UNIT
ns
operating characteristics, V
CC
= 5 V, T
A
= 25°C
PARAMETER
Cpd
Power dissipation capacitance
TEST CONDITIONS
CL = 50 pF,
f = 1 MHz
TYP
20
UNIT
pF
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3
SN54ACT14, SN74ACT14
HEX SCHMITT TRIGGER INVERTER
SCAS557H − DECEMBER 1995 − REVISED NOVEMBER 2004
PARAMETER MEASUREMENT INFORMATION
TEST
tPLH/tPHL
S1
Open
2
×
VCC
From Output
Under Test
CL = 50 pF
(see Note A)
500
Ω
S1
Open
Input
(see Note B)
tPLH
In-Phase
Output
tPHL
Out-of-Phase
Output
LOAD CIRCUIT
50% VCC
VOLTAGE WAVEFORMS
50% VCC
3V
1.5 V
1.5 V
0V
tPHL
VOH
50% VCC
VOL
tPLH
VOH
50% VCC
VOL
500
Ω
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
Ω,
tr
≤
2.5 ns, tf
≤
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
4
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