CD54HC670, CD74HC670, CD74HCT670
Switching Specifications
C
L
= 50pF, Input t
r
, t
f
= 6ns
(Continued)
25
o
C
V
CC
(V)
2
4.5
C
L
= 15pF
C
L
= 50pF
Output Disable Time
t
PLZ
, t
PHZ
C
L
= 50pF
5
6
2
4.5
C
L
= 15pF
C
L
= 50pF
Output Enable Time
t
PZL
, t
PZH
C
L
= 50pF
5
6
2
4.5
C
L
= 15pF
C
L
= 50pF
Output Transition Time
t
THL
, t
TLH
C
L
= 50pF
5
6
2
4.5
6
Input Capacitance
Three-State Output
Capacitance
Power Dissipation Capacitance
(Notes 5, 6)
HCT TYPES
Propagation Delay
Reading Any Word
t
PHL,
t
PLH
C
L
= 50pF
C
L
= 15pF
Write Enable to Output
t
PHL,
t
PLH
C
L
= 50pF
C
L
= 15pF
Data to Output
t
PHL,
t
PLH
C
L
= 50pF
C
L
= 15pF
Output Disable Time
t
PLZ
, t
PHZ
C
L
= 50pF
C
L
= 15pF
Output Enable Time
t
PZL
, t
PZH
C
L
= 50pF
C
L
= 15pF
Output Transition Time
Input Capacitance
Three-State Output
Capacitance
Power Dissipation Capacitance
(Notes 5, 6)
NOTES:
5. C
PD
is used to determine the dynamic power consumption, per output.
6. P
D
= C
PD
V
CC2
f
i
+
∑
C
L
V
CC2
f
O
where f
i
= Input Frequency, f
O
= Output Frequency, C
L
= Output Load Capacitance, V
CC
= Supply
Voltage.
t
TLH
, t
THL
C
I
C
O
C
PD
C
L
= 50pF
C
L
= 50pF
-
C
L
= 15pF
4.5
5
4.5
5
4.5
5
4.5
5
4.5
5
4.5
-
-
5
-
-
-
-
-
-
-
-
-
-
-
10
20
-
-
17
-
21
-
21
-
14
-
16
-
-
-
66
40
-
50
-
50
-
35
-
38
-
15
10
20
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
50
-
63
-
63
-
44
-
48
-
19
10
20
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
53
-
75
-
75
-
53
-
57
-
22
10
20
-
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
pF
pF
pF
C
I
C
O
C
PD
C
L
= 50pF
-
C
L
= 15pF
-
-
5
MIN
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
10
20
-
TYP
-
-
21
-
-
-
12
-
-
-
12
-
-
-
-
-
-
59
MAX
256
50
-
43
150
30
-
26
150
30
-
26
75
15
13
10
20
-
-40
o
C TO
85
o
C
MIN
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
MAX
315
63
-
54
190
38
-
33
190
38
-
33
95
19
10
10
20
-
-55
o
C TO
125
o
C
MIN
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
MAX
375
75
-
64
225
45
-
38
225
45
-
38
110
22
19
10
20
-
UNITS
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
pF
pF
pF
PARAMETER
Data to Output
SYMBOL
t
PLH
, t
PHL
TEST
CONDITIONS
C
L
= 50pF
6
TAOS [ TEXAS ADVANCED OPTOELECTRONIC SOLUTIONS ]
