SN74LS14 [ONSEMI]
Schmitt Triggers Dual Gate/Hex Inverter; 施密特触发器双栅极/六反相器
| 型号： | SN74LS14 |
| 厂家： | 
ONSEMI |
| 描述： | Schmitt Triggers Dual Gate/Hex Inverter |
| 文件： | 总4页 (文件大小：52K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
SN74LS14
Schmitt Triggers
Dual Gate/Hex Inverter
The SN74LS14 contains logic gates/inverters which accept
standard TTL input signals and provide standard TTL output levels.
They are capable of transforming slowly changing input signals into
sharply defined, jitter-free output signals. Additionally, they have
greater noise margin than conventional inverters.
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Each circuit contains a Schmitt trigger followed by a Darlington
level shifter and a phase splitter driving a TTL totem pole output. The
Schmitt trigger uses positive feedback to effectively speed-up slow
input transitions, and provide different input threshold voltages for
positive and negative-going transitions. This hysteresis between the
positive-going and negative-going input thresholds (typically
800 mV) is determined internally by resistor ratios and is essentially
insensitive to temperature and supply voltage variations.
LOW
POWER
SCHOTTKY
LOGIC AND CONNECTION DIAGRAMS
SN74LS14
14
1
V
CC
PLASTIC
N SUFFIX
CASE 646
14
13
12
11
10
9
8
14
1
2
3
4
5
6
7
1
GND
SOIC
D SUFFIX
CASE 751A
GUARANTEED OPERATING RANGES
Symbol
Parameter
Supply Voltage
Min
4.75
0
Typ
Max
5.25
70
Unit
V
V
CC
5.0
25
T
A
Operating Ambient
Temperature Range
°C
ORDERING INFORMATION
I
Output Current – High
Output Current – Low
–0.4
8.0
mA
mA
OH
Device
Package
14 Pin DIP
SOIC–14
Shipping
I
OL
SN74LS14N
SN74LS14D
SN74LS14DR2
2000 Units/Box
55 Units/Rail
SOIC–14 2500/Tape & Reel
Semiconductor Components Industries, LLC, 2001
1
Publication Order Number:
October, 2001 – Rev. 1
SN74LS14/D
SN74LS14
DC CHARACTERISTICS OVER OPERATING TEMPERATURE RANGE (unless otherwise specified)
Limits
Min
1.5
0.6
0.4
Typ
Max
2.0
Symbol
Parameter
Positive-Going Threshold Voltage
Negative-Going Threshold Voltage
Hysteresis
Unit
V
Test Conditions
= 5.0 V
V
T+
V
V
V
V
V
V
V
V
V
V
V
V
V
CC
CC
CC
CC
CC
CC
CC
CC
CC
CC
CC
CC
CC
V
V
V
V
1.1
V
= 5.0 V
= 5.0 V
T–
–V
0.8
–0.65
3.4
V
T+ T–
Input Clamp Diode Voltage
Output HIGH Voltage
–1.5
V
= MIN, I = –18 mA
IN
IK
2.7
V
= MIN, I
= MIN, I
= MIN, I
= –400 µA, V = V
IN IL
OH
OH
OL
OL
0.25
0.35
–0.14
–0.18
1.0
0.4
0.5
V
= 4.0 mA, V = 2.0 V
IN
V
OL
Output LOW Voltage
V
= 8.0 mA, V = 2.0 V
IN
I
I
Input Current at Positive-Going Threshold
Input Current at Negative-Going Threshold
mA
mA
µA
= 5.0 V, V = V
IN
T+
T+
= 5.0 V, V = V
IN
T–
T–
20
0.1
= MAX, V = 2.7 V
IN
I
Input HIGH Current
IH
mA
mA
mA
= MAX, V = 7.0 V
IN
I
I
Input LOW Current
–0.4
–100
16
= MAX, V = 0.4 V
IN
IL
Short Circuit Current (Note 1)
Power Supply Current
–20
= MAX, V
= 0 V
OUT
OS
8.6
12
Total, Output HIGH
I
mA
V
CC
= MAX
CC
21
Total, Output LOW
Note 1: Not more than one output should be shorted at a time, nor for more than 1 second.
AC CHARACTERISTICS (T = 25°C)
A
Symbol
Parameter
Max
22
Unit
ns
Test Conditions
t
Propagation Delay, Input to Output
Propagation Delay, Input to Output
PLH
V = 5.0 V
CC
= 15 pF
C
L
t
22
ns
PHL
3 V
1.6 V
t
V
IN
0.8 V
t
0 V
PHL
PLH
1.3 V
1.3 V
V
OUT
Figure 1. AC Waveforms
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2
SN74LS14
5
4
2
1.6
1.2
0.8
0.4
0
T
A
= 25°C
V
T
= 5 V
CC
= 25°C
V
T+
A
3
2
1
0
V
T-
DV
T
0
0.4
0.95
1.2
1.8
2
4.5
4.75
5
5.25
5.5
V , INPUT VOLTAGE (VOLTS)
IN
V , POWER SUPPLY VOLTAGE (VOLTS)
CC
Figure 2. V versus V
IN
Transfer Function
Figure 3. Threshold Voltage and Hysteresis
versus Power Supply Voltage
OUT
1.9
1.7
V
T+
1.5
1.3
1.1
V
T-
0.9
0.7
∆V
T
-ā55°
0° 25°
75°
125°
T , AMBIENT TEMPERATURE (°C)
A
Figure 4. Threshold Voltage Hysteresis
versus Temperature
PACKAGE DIMENSIONS
N SUFFIX
PLASTIC PACKAGE
CASE 646–06
ISSUE M
NOTES:
1. DIMENSIONING AND TOLERANCING PER ANSI
Y14.5M, 1982.
14
1
8
7
2. CONTROLLING DIMENSION: INCH.
3. DIMENSION L TO CENTER OF LEADS WHEN
FORMED PARALLEL.
4. DIMENSION B DOES NOT INCLUDE MOLD FLASH.
5. ROUNDED CORNERS OPTIONAL.
B
INCHES
DIM MIN MAX
MILLIMETERS
A
F
MIN
18.16
6.10
3.69
0.38
1.02
MAX
18.80
6.60
4.69
0.53
1.78
A
B
C
D
F
0.715
0.240
0.145
0.015
0.040
0.770
0.260
0.185
0.021
0.070
L
N
C
G
H
J
0.100 BSC
2.54 BSC
0.052
0.008
0.115
0.290
---
0.095
0.015
0.135
0.310
10
1.32
0.20
2.92
7.37
---
2.41
0.38
3.43
7.87
10
–T–
SEATING
PLANE
K
L
J
K
M
N
_
_
0.015
0.039
0.38
1.01
D 14 PL
H
G
M
M
0.13 (0.005)
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3
SN74LS14
PACKAGE DIMENSIONS
D SUFFIX
PLASTIC SOIC PACKAGE
CASE 751A–03
NOTES:
1. DIMENSIONING AND TOLERANCING PER ANSI
Y14.5M, 1982.
ISSUE F
–A–
2. CONTROLLING DIMENSION: MILLIMETER.
3. DIMENSIONS A AND B DO NOT INCLUDE
MOLD PROTRUSION.
14
8
7
4. MAXIMUM MOLD PROTRUSION 0.15 (0.006)
PER SIDE.
–B–
5. DIMENSION D DOES NOT INCLUDE DAMBAR
PROTRUSION. ALLOWABLE DAMBAR
PROTRUSION SHALL BE 0.127 (0.005) TOTAL
IN EXCESS OF THE D DIMENSION AT
MAXIMUM MATERIAL CONDITION.
P 7 PL
M
M
B
0.25 (0.010)
1
MILLIMETERS
DIM MIN MAX
INCHES
MIN
G
MAX
0.344
0.157
0.068
0.019
0.049
F
R X 45
_
C
A
B
C
D
F
8.55
3.80
1.35
0.35
0.40
8.75 0.337
4.00 0.150
1.75 0.054
0.49 0.014
1.25 0.016
–T–
SEATING
PLANE
J
M
G
J
1.27 BSC
0.050 BSC
K
D 14 PL
0.19
0.10
0
0.25 0.008
0.25 0.004
0.009
0.009
7
M
S
S
0.25 (0.010)
T
B
A
K
M
P
R
7
0
_
_
_
_
5.80
0.25
6.20 0.228
0.50 0.010
0.244
0.019
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are trademarks of Semiconductor Components Industries, LLC (SCILLC). SCILLC reserves the right to make changes
without further notice to any products herein. SCILLC makes no warranty, representation or guarantee regarding the suitability of its products for any particular
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SN74LS14/D
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