ONSEMI SN74LS14

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.
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.
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LOW
POWER
SCHOTTKY
LOGIC AND CONNECTION DIAGRAMS
14
SN74LS14
VCC
1
14
13
12
11
10
9
8
1
2
3
4
5
6
7
PLASTIC
N SUFFIX
CASE 646
14
GND
1
SOIC
D SUFFIX
CASE 751A
GUARANTEED OPERATING RANGES
Symbol
VCC
Parameter
Supply Voltage
Min
Typ
Max
Unit
4.75
5.0
5.25
V
0
25
70
°C
TA
Operating Ambient
Temperature Range
IOH
Output Current − High
−0.4
mA
IOL
Output Current − Low
8.0
mA
© Semiconductor Components Industries, LLC, 2006
June, 2006 − Rev. 2
1
ORDERING INFORMATION
Device
Package
Shipping
SN74LS14N
14 Pin DIP
2000 Units/Box
SN74LS14D
SOIC−14
55 Units/Rail
SN74LS14DR2
SOIC−14
2500/Tape & Reel
Publication Order Number:
SN74LS14/D
SN74LS14
DC CHARACTERISTICS OVER OPERATING TEMPERATURE RANGE (unless otherwise specified)
Limits
Symbol
Min
Parameter
Typ
Max
Unit
Test Conditions
VT+
Positive-Going Threshold Voltage
1.5
2.0
V
VCC = 5.0 V
VT−
Negative-Going Threshold Voltage
0.6
1.1
V
VCC = 5.0 V
VT+ −VT−
Hysteresis
0.4
V
VCC = 5.0 V
VIK
Input Clamp Diode Voltage
V
VCC = MIN, IIN = − 18 mA
VOH
Output HIGH Voltage
V
VCC = MIN, IOH = − 400 μA, VIN = VIL
VOL
Output LOW Voltage
IT+
Input Current at Positive-Going Threshold
−0.14
mA
VCC = 5.0 V, VIN = VT+
IT−
Input Current at Negative-Going Threshold
−0.18
mA
VCC = 5.0 V, VIN = VT−
IIH
Input HIGH Current
IIL
Input LOW Current
IOS
Short Circuit Current (Note 1)
0.8
−0.65
2.7
0.25
0.4
V
VCC = MIN, IOL = 4.0 mA, VIN = 2.0 V
0.35
0.5
V
VCC = MIN, IOL = 8.0 mA, VIN = 2.0 V
1.0
−20
Power Supply Current
ICC
−1.5
3.4
20
μA
VCC = MAX, VIN = 2.7 V
0.1
mA
VCC = MAX, VIN = 7.0 V
−0.4
mA
VCC = MAX, VIN = 0.4 V
−100
mA
VCC = MAX, VOUT = 0 V
mA
VCC = MAX
8.6
16
12
21
Total, Output HIGH
Total, Output LOW
Note 1: Not more than one output should be shorted at a time, nor for more than 1 second.
AC CHARACTERISTICS (TA = 25°C)
Symbol
Parameter
Max
Unit
Test Conditions
VCC = 5.0 V
CL = 15 pF
tPLH
Propagation Delay, Input to Output
22
ns
tPHL
Propagation Delay, Input to Output
22
ns
3V
1.6 V
VIN
0.8 V
0V
tPHL
VOUT
tPLH
1.3 V
Figure 1. AC Waveforms
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2
1.3 V
SN74LS14
2
4
V T , THRESHOLD VOLTAGE (VOLTS)
Δ V T, HYSTERESIS (VOLTS)
VCC = 5 V
TA = 25°C
3
VT+
1.2
2
VT−
0.8
1
0
TA = 25°C
1.6
DVT
0.4
0
0.4
0.95
1.2
VIN, INPUT VOLTAGE (VOLTS)
1.8
0
4.5
2
Figure 2. VIN versus VOUT Transfer Function
4.75
5
5.25
VCC, POWER SUPPLY VOLTAGE (VOLTS)
Figure 3. Threshold Voltage and Hysteresis
versus Power Supply Voltage
1.9
V T , THRESHOLD VOLTAGE (VOLTS)
Δ V T, HYSTERESIS (VOLTS)
V O , OUTPUT VOLTAGE (VOLTS)
5
1.7
VT+
1.5
1.3
1.1
0.9
0.7
−55 °
VT−
Δ VT
0° 25°
75°
TA, AMBIENT TEMPERATURE (°C)
Figure 4. Threshold Voltage Hysteresis
versus Temperature
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3
125°
5.5
SN74LS14
PACKAGE DIMENSIONS
N SUFFIX
PLASTIC PACKAGE
CASE 646−06
ISSUE M
14
8
B
1
7
A
F
L
N
C
−T−
SEATING
PLANE
H
G
D 14 PL
J
K
0.13 (0.005)
M
M
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4
NOTES:
1. DIMENSIONING AND TOLERANCING PER ANSI
Y14.5M, 1982.
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.
DIM
A
B
C
D
F
G
H
J
K
L
M
N
INCHES
MIN
MAX
0.715
0.770
0.240
0.260
0.145
0.185
0.015
0.021
0.040
0.070
0.100 BSC
0.052
0.095
0.008
0.015
0.115
0.135
0.290
0.310
−−−
10_
0.015
0.039
MILLIMETERS
MIN
MAX
18.16
18.80
6.10
6.60
3.69
4.69
0.38
0.53
1.02
1.78
2.54 BSC
1.32
2.41
0.20
0.38
2.92
3.43
7.37
7.87
−−−
10_
0.38
1.01
SN74LS14
PACKAGE DIMENSIONS
D SUFFIX
PLASTIC SOIC PACKAGE
CASE 751A−03
ISSUE F
NOTES:
1. DIMENSIONING AND TOLERANCING PER ANSI
Y14.5M, 1982.
2. CONTROLLING DIMENSION: MILLIMETER.
3. DIMENSIONS A AND B DO NOT INCLUDE
MOLD PROTRUSION.
4. MAXIMUM MOLD PROTRUSION 0.15 (0.006)
PER SIDE.
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.
−A−
14
8
−B−
1
0.25 (0.010)
7
G
0.25 (0.010)
M
T B
B
M
F
J
M
K
D 14 PL
M
R X 45 _
C
−T−
SEATING
PLANE
P 7 PL
S
A
S
DIM
A
B
C
D
F
G
J
K
M
P
R
MILLIMETERS
MIN
MAX
8.55
8.75
3.80
4.00
1.35
1.75
0.35
0.49
0.40
1.25
1.27 BSC
0.19
0.25
0.10
0.25
0_
7_
5.80
6.20
0.25
0.50
INCHES
MIN
MAX
0.337
0.344
0.150
0.157
0.054
0.068
0.014
0.019
0.016
0.049
0.050 BSC
0.008
0.009
0.004
0.009
0_
7_
0.228
0.244
0.010
0.019
ON Semiconductor and
are registered 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 purpose, nor does SCILLC assume any liability
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operating parameters, including “Typicals” must be validated for each customer application by customer’s technical experts. SCILLC does not convey any license under its patent rights
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SN74LS14/D