December 1990 5
Philips Semiconductors Product specification
Nine wide Schmitt trigger buffer;
open drain outputs
74HC/HCT9115
DC CHARACTERISTICS FOR 74HC
For the DC characteristics see
“74HC/HCT/HCU/HCMOS Logic Family Specifications”
.
Transfer characteristics are given below.
Output capability: standard
I
CC
category: MSI
TRANSFER CHARACTERISTICS FOR 74HC
Voltages are referred to GND (ground = 0 V)
AC CHARACTERISTICS FOR 74HC
GND = 0 V; t
r
=t
f
= 6 ns; C
L
= 50 pF
SYMBOL PARAMETER
T
amb
(°C)
UNIT
TEST CONDITIONS
74HC
V
CC
(V)
WAVEFORMS+25 −40 to +85 −40 to +125
min. typ. max. min. max. min. max.
V
T+
positive-going threshold 0.70
1.75
2.30
1.13
2.37
3.11
1.50
3.15
4.20
0.70
1.75
2.30
1.50
3.15
4.20
0.70
1.75
2.30
1.50
3.15
4.20
V 2.0
4.5
6.0
Fig.6
V
T−
negative-going threshold 0.30
1.35
1.80
0.70
1.80
2.43
1.10
2.40
3.30
0.30
1.35
1.80
1.10
2.40
3.30
0.30
1.35
1.80
1.10
2.40
3.30
V 2.0
4.5
6.0
Fig.6
V
H
hysteresis (V
T+
− V
T−
) 0.2
0.4
0.5
0.43
0.57
0.68
0.80
1.00
1.10
0.18
0.40
0.50
0.80
1.00
1.10
0.15
0.40
0.50
0.80
1.00
1.10
V 2.0
4.5
6.0
Fig.6
SYMBOL PARAMETER
T
amb
(°C)
UNIT
TEST CONDITIONS
74HC
V
CC
(V)
WAVEFORMS+25 −40 to +85 −40 to +125
min. typ. max. min. max. min. max.
t
PHL
/ t
PLZ
propagation delay
A
n
to Y
n
36
13
10
115
22
19
140
28
24
165
33
28
ns 2.0
4.5
6.0
Fig.7
t
THL
output transition time 19
7
6
75
15
13
95
19
16
110
22
19
ns 2.0
4.5
6.0
Fig.7
