NXP Semiconductors
74HC14; 74HCT14
Hex inverting Schmitt trigger
Table 9.
Type
74HC14
74HCT14
Test data
Input
V
I
V
CC
3.0 V
t
r
, t
f
6.0 ns
6.0 ns
Load
C
L
15 pF, 50 pF
15 pF, 50 pF
t
PLH
, t
PHL
t
PLH
, t
PHL
Test
13. Transfer characteristics
Table 10. Transfer characteristics
At recommended operating conditions; voltages are referenced to GND (ground = 0 V); see
and
Symbol Parameter
Conditions
T
amb
= 25
C
Min
74HC14
V
T+
positive-going
threshold
voltage
V
CC
= 2.0 V
V
CC
= 4.5 V
V
CC
= 6.0 V
0.7
1.7
2.1
0.3
0.9
1.2
0.2
0.4
0.6
1.2
1.4
0.5
0.6
0.4
0.4
1.18
2.38
3.14
0.52
1.4
1.89
0.66
0.98
1.25
1.41
1.59
0.85
0.99
0.56
0.6
1.5
3.15
4.2
0.9
2.0
2.6
1.0
1.4
1.6
1.9
2.1
1.2
1.4
-
-
0.7
1.7
2.1
0.3
0.9
1.2
0.2
0.4
0.6
1.2
1.4
0.5
0.6
0.4
0.4
1.5
3.15
4.2
0.9
2.0
2.6
1.0
1.4
1.6
1.9
2.1
1.2
1.4
-
-
0.7
1.7
2.1
0.3
0.9
1.2
0.2
0.4
0.6
1.2
1.4
0.5
0.6
0.4
0.4
1.5
3.15
4.2
0.9
2.0
2.6
1.0
1.4
1.6
1.9
2.1
1.2
1.4
-
-
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
Typ
Max
T
amb
=
40 C
to +85
C
Min
Max
T
amb
=
40 C
to +125
C
Min
Max
Unit
V
T
negative-going V
CC
= 2.0 V
threshold
V
CC
= 4.5 V
voltage
V
CC
= 6.0 V
hysteresis
voltage
V
CC
= 2.0 V
V
CC
= 4.5 V
V
CC
= 6.0 V
V
H
74HCT14
V
T+
positive-going
threshold
voltage
V
CC
= 4.5 V
V
CC
= 5.5 V
V
T
negative-going V
CC
= 4.5 V
threshold
V
CC
= 5.5 V
voltage
hysteresis
voltage
V
CC
= 4.5 V
V
CC
= 5.5 V
V
H
14. Transfer characteristics waveforms
V
O
V
T+
V
I
V
T−
V
H
V
H
V
T−
V
T+
V
I
mna207
V
O
mna208
Fig 8.
74HC_HCT14
Transfer characteristics
Fig 9.
Transfer characteristics definitions
© NXP B.V. 2012. All rights reserved.
All information provided in this document is subject to legal disclaimers.
Product data sheet
Rev. 6 — 19 September 2012
8 of 21
PHILIPS [ NXP SEMICONDUCTORS ]
