
Philips Semiconductors 
Product specification
74F14
Hex inverter Schmitt trigger
November 26, 1990
4
DC ELECTRICAL CHARACTERISTICS
(Over recommended operating free-air temperature range unless otherwise noted.)
SYMBOL
PARAMETER
TEST CONDITIONS
1
LIMITS
TYP
2
UNIT
MIN
MAX
V
T+
V
T–
V
T
V
OH
Positive-going threshold
V
CC
 = 5.0V
V
CC
 = 5.0V
V
CC
 = 5.0V
V
CC
 = MIN, V
I
 = V
T–MIN
,
I
OH
 = MAX
V
CC
 = MIN, V
I
 = V
T+MAX
,
I
OL 
= MAX
V
CC
 = MIN, I
I
 = I
IK
V
CC
 = 5.0V, V
I
 = V
T+
V
CC
 = 5.0V, V
I
 = V
T–
V
CC
 = MAX, V
I
 = 7.0V
V
CC
 = MAX, V
I
 = 2.7V
V
CC
 = MAX, V
I
 = 0.5V
V
CC
 = MAX
V
CC
 = MAX
V
CC
 = MAX
1.4
1.7
2.0
V
Negative-going threshold
0.7
0.9
1.1
V
Hysteresis (V
T+ 
– V
T–
)
High-level output voltage
0.4
0.8
V
±
10%V
CC
±
5%V
CC
±
10%V
CC
±
5%V
CC
2.5
V
2.7
3.4
V
V
OL
Low-level output voltage
0.30
0.50
V
0.30
0.50
V
V
IK
I
T+
I
T–
I
I
I
IH
I
IL
I
OS
I
CC
Input clamp voltage
-0.73
-1.2
V
Input current at positive-going threshold
0
μ
A
μ
A
μ
A
Input current at negative-going threshold
–175
Input current at maximum input voltage
100
High-level input current
20
μ
A
Low-level input current
Short-circuit output current
3
-0.6
mA
-60
-150
mA
Supply current (total)
I
CCH
I
CCL
V
IN
 = GND
V
IN
 = 4.5V
13
22
mA
23
32
mA
NOTES:
1
For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions for the applicable type.
2
All typical values are at V
CC
 = 5V, T
amb
 = 25
°
C.
3
Not more than one output should be shorted at a time. For testing I
OS
, the use of high-speed test apparatus and/or sample-and-hold
techniques are preferable in order to minimize internal heating and more accurately reflect operational values. Otherwise, prolonged shorting
of a high output may raise the chip temperature well above normal and thereby cause invalid readings in other parameter tests. In any
sequence of parameter tests, I
OS
 tests should be performed last.
AC ELECTRICAL CHARACTERISTICS
LIMITS
SYMBOL
PARAMETER
TEST
 CONDITION
V
CC
 = +5.0V
T
amb
 = +25
°
C
C
L
= 50pF, R
L
 = 500
V
CC
 = +5.0V 
±
10%
T
amb
 = 0
°
C to +70
°
C
C
L
 = 50pF, R
L
 = 500
V
CC
 = +5.0V 
±
10%
T
amb
 = –40
°
C to +85
°
C
C
L
 = 50pF, R
L
 = 500
UNIT
MIN
TYP
MAX
MIN
MAX
MIN
MAX
t
PLH
t
PHL
Propagation delay
Dn to Qn
Waveform 1
4.0
3.5
6.5
5.0
8.5
6.5
4.0
3.5
9.5
7.0
3.0
3.5
10.5
9.0
ns