Philips Semiconductors
Product specification
Hex inverting Schmitt trigger
DC CHARACTERISTICS FOR 74HC
74HC/HCT14
For the DC characteristics see
“74HC/HCT/HCU/HCMOS Logic Family Specifications”.
Transfer characteristics are
given below.
Output capability: standard
I
CC
category: SSI
Transfer characteristics for 74HC
Voltages are referenced to GND (ground = 0 V)
T
amb
(°C)
74HC
SYMBOL PARAMETER
+25
min.
V
T
+
positive-going
threshold
negative-going
threshold
hysteresis
(V
T
+
−
V
T
−)
0.7
1.7
2.1
0.3
0.9
1.2
0.2
0.4
0.6
typ.
1.18
2.38
3.14
0.52
1.40
1.89
0.66
0.98
1.25
max.
1.5
3.15
4.2
0.90
2.00
2.60
1.0
1.4
1.6
−40
to +85
min.
0.7
1.7
2.1
0.3
0.90
1.20
0.2
0.4
0.6
max.
1.5
3.15
4.2
0.90
2.00
2.60
1.0
1.4
1.6
−40
to +125
min.
0.7
1.7
2.1
0.30
0.90
1.2
0.2
0.4
0.6
max.
1.5
3.15
4.2
0.90
2.00
2.60
1.0
1.4
1.6
V
2.0
4.5
6.0
2.0
4.5
6.0
2.0
4.5
6.0
Figs 6 and 7
UNIT
V
CC
WAVEFORMS
(V)
TEST CONDITIONS
V
T
−
V
Figs 6 and 7
V
H
V
Figs 6 and 7
AC CHARACTERISTICS FOR 74HC
GND = 0 V; t
f
= t
f
= 6 ns; C
L
= 50 pF
T
amb
(°C)
74HC
SYMBOL PARAMETER
+25
min.
t
PHL
/ t
PLH
propagation delay
nA to nY
output transition
time
typ.
41
15
12
19
7
6
max.
125
25
21
75
15
13
−40
to +85
min.
max.
155
31
26
95
19
15
−40
to +125
min.
max.
190
38
32
110
22
19
ns
2.0
4.5
6.0
2.0
4.5
6.0
Fig.8
UNIT
V
CC
WAVEFORMS
(V)
TEST CONDITIONS
t
THL
/ t
TLH
ns
Fig.8
September 1993
4
PHILIPS [ NXP SEMICONDUCTORS ]
