TECHNICAL DATA
1
Hex Schmitt-Trigger Inverter
This device contains six independent gates each of which performs
the logic INVERT function. Each input has hysteresis which increases
the noise immunity and transforms a slowly changing input signal to a
fast changing, jitter free output.
IN74LS14
ORDERING INFORMATION
IN74LS14N Plastic
IN74LS14D SOIC
T
A
= 0
to 70
C for all
packages
LOGIC DIAGRAM
PIN 14 =V
CC
PIN 7 = GND
PIN ASSIGNMENT
FUNCTION TABLE
Inputs
Output
A
Y
L
H
H
L
IN74LS14
2
MAXIMUM RATINGS
*
Symbol
Parameter
Value
Unit
V
CC
Supply Voltage
7.0
V
V
IN
Input Voltage
7.0
V
V
OUT
Output Voltage
5.5
V
Tstg
Storage Temperature Range
-65 to +150
C
*
Maximum Ratings are those values beyond which damage to the device may occur.
Functional operation should be restricted to the Recommended Operating Conditions.
RECOMMENDED OPERATING CONDITIONS
Symbol
Parameter
Min
Max
Unit
V
CC
Supply Voltage
4.75
5.25
V
I
OH
High Level Output Current
-15
mA
I
OL
Low Level Output Current
24
mA
T
A
Ambient Temperature Range
0
+70
C
DC ELECTRICAL CHARACTERISTICS over full operating conditions
Guaranteed Limit
Symbol
Parameter
Test Conditions
Min
Max
Unit
V
T+
-
Positive-Going Input Threshold
Voltage
V
CC
= 5 V
0.5
1
V
V
T-
-
Negative-Going Input Threshold
Voltage
V
CC
= 5 V
1.4
1.9
V
V
T+
- V
T-
Hysteresis
V
CC
= 5 V
0.4
V
V
IK
Input Clamp Voltage
V
CC
= min, I
IN
= -18 mA
-1.5
V
V
OH
High Level Output Voltage
V
CC
= min, I
OH
= -0.4 mA,
V
I
=0.5 V
2.7
V
V
OL
Low Level Output Voltage
V
CC
= min, I
OL
= 4 mA
V
I
=1.9 V
0.4
V
V
CC
= min, I
OL
= 8 mA
V
I
=1.9 V
0.5
I
IH
High Level Input Current
V
CC
= max, V
IN
= 2.7 V
20
A
V
CC
= max, V
IN
= 7.0 V
0.1
mA
I
IL
Low Level Input Current
V
CC
= max, V
IN
= 0.4 V
-0.4
mA
I
O
Output Short Circuit Current
V
CC
= max, V
O
=0 V
(Note 1)
-20
-100
mA
I
CC
Supply Current
Total with
outputs high
V
CC
= max
16
mA
Total with
outputs low
21
Note 1: Not more than one output should be shorted at a time, and the duration should not exceed one second.
IN74LS14
3
AC ELECTRICAL CHARACTERISTICS
(T
A
= 25
C, V
CC
= 5.0 V, C
L
= 15 pF,
R
L
= 2 k
, t
r
= 15 ns, t
f
= 6.0 ns)
Symbol
Parameter
Min
Max
Unit
t
PLH
Propagation Delay, Input A to Output Y
22
ns
t
PHL
Propagation Delay, Input A to Output Y
22
ns
Figure 1. Switching Waveforms
NOTES A. C
L
includes probe and jig capacitance.
B. All diodes are 1N916 or 1N3064.
Figure 2. Test Circuit
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