Philips Semiconductors
Product speci铿乧ation
Quad bus transceiver; 3-state
DC CHARACTERISTICS FOR 74HC
For the DC characteristics see
鈥?4HC/HCT/HCU/HCMOS Logic Family Specifications鈥?
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
(掳C)
74HC
SYMBOL PARAMETER
min.
74HC/HCT243
TEST CONDITIONS
UNIT V
WAVEFORMS
CC
(V)
ns
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
+25
鈭?0
to
+85
鈭?0
to
+125
min.
max.
135
27
23
225
45
38
250
50
43
90
18
15
typ. max. min. max.
t
PHL
/ t
PLH
propagation delay
A
n
to B
n
;
B
n
to A
n
3-state output enable time
OE
A
to A
n
or B
n;
OE
B
to A
n
or B
n
3-state output disable time
OE
A
to A
n
or B
n;
OE
B
to A
n
or B
n
output transition time
22
8
6
50
18
14
61
22
18
14
5
4
90
18
15
150
30
26
165
33
28
60
12
10
115
23
20
190
38
33
205
41
35
75
15
13
t
PZH
/ t
PZL
ns
Figs 6 and 7
t
PHZ
/ t
PLZ
ns
Figs 6 and 7
t
THL
/ t
TLH
ns
Fig.5
December 1990
5