SN74HCT14DB [TI]
HEX SCHMITT-TRIGGER INVERTERS; 六角施密特触发反相器
| 型号： | SN74HCT14DB |
| 厂家： | 
TEXAS INSTRUMENTS |
| 描述： | HEX SCHMITT-TRIGGER INVERTERS |
| 文件： | 总6页 (文件大小：88K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
SN54HCT14, SN74HCT14
HEX SCHMITT-TRIGGER INVERTERS
SCLS225C – JULY 1995 – REVISED FEBRUARY 2000
SN54HCT14 . . . J OR W PACKAGE
SN74HCT14 . . . D, DB, DGV, N, OR PW PACKAGE
(TOP VIEW)
Inputs Are TTL-Voltage Compatible
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
1A
1Y
V
CC
1
2
3
4
5
6
7
14
13
12
11
6A
6Y
5A
2A
2Y
3A
10 5Y
9
8
3Y
4A
4Y
description
GND
The ’HCT14 devices contain six independent
inverters. The devices perform the Boolean
function Y = A in positive logic.
SN54HCT14 . . . FK PACKAGE
(TOP VIEW)
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.
3
2
1
20 19
18
6Y
NC
5A
2A
NC
2Y
4
5
6
7
8
17
16
FUNCTION TABLE
(each inverter)
15 NC
14
9 10 11 12 13
NC
3A
INPUT
A
OUTPUT
Y
5Y
H
L
L
H
NC – No internal connection
†
logic symbol
2
1
1Y
1A
2A
3A
4A
5A
6A
3
4
2Y
6
5
3Y
8
9
4Y
11
13
10
5Y
12
6Y
†
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.
Copyright 2000, Texas Instruments Incorporated
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.
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.
1
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
SN54HCT14, SN74HCT14
HEX SCHMITT-TRIGGER INVERTERS
SCLS225C – JULY 1995 – REVISED FEBRUARY 2000
†
absolute maximum ratings over operating free-air temperature range
Supply voltage range, V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.5 V to 7 V
CC
Input voltage range, V (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.5 V to V
+0.5 V
+0.5 V
I
CC
CC
Output voltage range, V (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.5 V to V
O
Input clamp current, I (V < 0 or V > V ) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±20 mA
IK
I
I
CC
Output clamp current, I
(V < 0 or V > V ) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±20 mA
OK
O O CC
Continuous output current, I (V = 0 to V ) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±25 mA
Continuous current through V
Package thermal impedance, θ (see Note 2): D package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86°C/W
O
O
CC
CC
or GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±50 mA
JA
DB package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96°C/W
DGV package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 127°C/W
N package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80°C/W
PW package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113°C/W
Storage temperature range, T
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –65°C to 150°C
stg
†
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
4.5
0
MAX
MIN
4.5
0
MAX
V
V
V
Supply voltage
5.5
5.5
V
V
CC
Input voltage
V
V
V
V
I
CC
CC
Output voltage
0
0
V
O
CC
CC
85
T
A
Operating free-air temperature
–55
125
–40
°C
NOTE 3: All unused inputs of the device must be held at V
or GND to ensure proper device operation. Refer to the TI application report,
CC
Implications of Slow or Floating CMOS Inputs, literature number SCBA004.
2
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
SN54HCT14, SN74HCT14
HEX SCHMITT-TRIGGER INVERTERS
SCLS225C – JULY 1995 – REVISED FEBRUARY 2000
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
T
A
= 25°C
SN54HCT14
SN74HCT14
PARAMETER
TEST CONDITIONS
V
CC
UNIT
MIN
TYP
MAX
MIN
MAX
MIN
MAX
V
4.5 V
5.5 V
4.5 V
5.5 V
4.5 V
5.5 V
1.2
1.5
1.7
0.9
1
1.9
1.2
1.9
1.2
1.9
T+
V
Positive-going
threshold
1.4
0.5
0.6
0.4
0.4
2.1
1.2
1.4
1.4
1.5
1.4
0.5
0.6
0.4
0.4
2.1
1.2
1.4
1.4
1.5
1.4
0.5
0.6
0.4
0.4
2.1
1.2
1.4
1.4
1.5
V
T–
V
V
Negative-going
threshold
∆V
Hysteresis
(V – V
T+
0.6
0.65
T
)
T–
I
I
I
I
= –20 µA
4.5 V
4.5 V
4.5 V
4.5 V
5.5 V
5.5 V
4.4
4.49
4.3
4.4
3.7
4.4
OH
OH
OL
OL
V
V
V
V
OH
= –4 mA
= 20 µA
= 4 mA
3.98
3.84
0.001
0.17
0.1
0.26
±0.1
2
0.1
0.4
±1
0.1
0.33
±1
OL
I
I
V = V
or GND
or GND,
µA
µA
I
I
CC
CC
V = V
I = 0
O
40
20
CC
I
One input at 0.5 V or 2.4 V,
Other inputs at GND or V
†
∆I
CC
5.5 V
5 V
0.2
3
2.4
10
3
2.9
10
mA
pF
CC
C
VI = V
CC
or GND
10
i
†
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 V
CC
.
switching characteristics over recommended operating free-air temperature range, C = 50 pF
L
(unless otherwise noted) (see Figure 1)
T
A
= 25°C
TYP
20
SN54HCT14
SN74HCT14
FROM
(INPUT)
TO
(OUTPUT)
PARAMETER
V
UNIT
ns
CC
MIN
MAX
32
MIN
MAX
48
MIN
MAX
40
4.5 V
5.5 V
4.5 V
5.5 V
t
A
Y
Y
pd
t
18
30
45
38
7
15
22
19
t
ns
6
14
20
17
operating characteristics, T = 25°C
A
PARAMETER
TEST CONDITIONS
TYP
UNIT
C
Power dissipation capacitance
No load
10
pF
pd
3
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
SN54HCT14, SN74HCT14
HEX SCHMITT-TRIGGER INVERTERS
SCLS225C – JULY 1995 – REVISED FEBRUARY 2000
PARAMETER MEASUREMENT INFORMATION
3 V
0 V
From Output
Under Test
Test
Point
Input
1.3 V
1.3 V
C
= 50 pF
L
t
t
PLH
PHL
90%
(see Note A)
V
V
OH
In-Phase
Output
90%
t
1.3 V
10%
1.3 V
10%
LOAD CIRCUIT
OL
t
r
f
f
t
t
PLH
PHL
90%
V
CC
V
V
OH
90%
t
90%
90%
t
Input
1.3 V
10%
1.3 V
10%
Out-of-Phase
Output
1.3 V
10%
1.3 V
10%
0 V
OL
t
t
r
r
f
VOLTAGE WAVEFORM
INPUT RISE AND FALL TIMES
VOLTAGE WAVEFORMS
PROPAGATION DELAY AND OUTPUT RISE AND FALL TIMES
NOTES: A.
B. Phase relationships between waveforms were chosen arbitrarily. All input pulses are supplied by generators having the following
characteristics: PRR ≤ 1 MHz, Z = 50 Ω, t = 6 ns, t = 6 ns.
C includes probe and test-fixture capacitance.
L
O
r
f
C. The outputs are measured one at a time with one input transition per measurement.
D. and t are the same as t
t
.
pd
PLH
PHL
Figure 1. Load Circuit and Voltage Waveforms
4
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
SN54HCT14, SN74HCT14
HEX SCHMITT-TRIGGER INVERTERS
SCLS225C – JULY 1995 – REVISED FEBRUARY 2000
TYPICAL CHARACTERISTICS
SUPPLY CURRENT
vs
SUPPLY CURRENT
vs
INPUT VOLTAGE
INPUT VOLTAGE
0.5
0.45
0.4
0.5
0.45
0.4
V
CC
= 4.5 V
V
CC
= 5.5 V
V = 0 to V
I
CC
0.35
0.3
0.35
0.3
V = V
I
to 0
CC
V = 0 to V
I
CC
0.25
0.2
0.25
0.2
V = V
I
to 0
CC
0.15
0.15
0.1
0.05
0
0.1
0.05
0
0
0.45 0.9 1.35 1.8 2.26 2.7 3.16 3.61
4
0
0.55 1.1 1.66 2.2 2.76 3.3 3.86 4.4 4.97
V – Input Voltage – V
I
V – Input Voltage – V
I
OUTPUT VOLTAGE
vs
OUTPUT VOLTAGE
vs
INPUT VOLTAGE
INPUT VOLTAGE
6
5
6
5
V
CC
= 4.5 V
V
CC
= 5.5 V
4
3
2
4
3
2
V = Down
V = Down
I
I
V = Up
I
V = Up
I
1
0
1
0
–1
–1
0
0.75
1.5
2.27
3
3.77
0
0.92
1.84
2.76
3.68
4.6
V – Input Voltage – V
I
V – Input Voltage – V
I
5
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
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any product or service without notice, and advise customers to obtain the latest version of relevant information
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subject to the terms and conditions of sale supplied at the time of order acknowledgement, including those
pertaining to warranty, patent infringement, and limitation of liability.
TI warrants performance of its semiconductor products to the specifications applicable at the time of sale in
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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safeguards must be provided by the customer to minimize inherent or procedural hazards.
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Copyright 2000, Texas Instruments Incorporated
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