Philips Semiconductors
Product specification
Octal buffer/line driver; 3-state
DC CHARACTERISTICS FOR 74HC
For the DC characteristics see
“74HC/HCT/HCU/HCMOS Logic Family Specifications”.
Output capability: bus driver
I
CC
category: MSI
AC CHARACTERISTICS FOR 74HC
GND = 0 V; t
r
= t
f
= 6 ns; C
L
= 50 pF
T
amb
(°C)
74HC
SYMBOL
PARAMETER
+25
−40
to
+85
−40
to
+125
max.
165
33
28
225
45
38
225
45
38
90
18
15
ns
74HC/HCT244
TEST CONDITIONS
UNIT V
WAVEFORMS
CC
(V)
2.0
4.5
6.0
2.0
4.5
6.0
2.0
4.5
6.0
2.0
4.5
6.0
Fig.5
min. typ. max. min. max. min.
t
PHL
/ t
PLH
propagation delay
1A
n
to 1Y
n;
2A
n
to 2Y
n
3-state output enable time
1OE to 1Y
n;
2OE to 2Y
n
3-state output disable time
1OE to 1Y
n;
2OE to 2Y
n
output transition time
30
11
9
36
13
10
39
14
11
14
5
4
110
22
19
150
30
26
150
30
26
60
12
10
145
28
24
190
38
33
190
38
33
75
15
13
t
PZH
/ t
PZL
ns
Fig.6
t
PHZ
/ t
PLZ
ns
Fig.6
t
THL
/ t
TLH
ns
Fig.5
December 1990
5
PHILIPS [ NXP SEMICONDUCTORS ]
