CD54HC670, CD74HC670, CD74HCT670
Prerequisite for Switching Specifications
o
o
o
o
o
25 C
-40 C TO 85 C
-55 C TO 125 C
PARAMETER
HC TYPES
SYMBOL
V
(V) MIN
TYP
MAX
MIN
TYP
MAX
MIN
TYP
MAX UNITS
CC
Setup Time
Data to WE
Write to WE
t
, t
2
60
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
75
15
13
5
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
90
18
15
5
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
SU
h
4.5
6
12
10
5
Hold Time
Data to WE
Write to WE
t , t
2
H
W
4.5
6
5
5
5
5
5
5
Pulse Width WE
t
2
80
16
14
100
20
17
100
20
17
125
25
21
120
24
20
150
30
26
W
4.5
6
Latch Time WE to RA0,
RA1
t
2
LATCH
4.5
6
HCT TYPES
Setup Time
Data to WE
t
, t
4.5
4.5
12
5
-
-
-
-
15
5
-
-
-
-
18
5
-
-
-
-
ns
ns
SU
h
Hold Time
Data to WE
Write to WE
t , t
H W
Setup Time
Write to WE
t
4.5
18
-
-
23
-
-
27
-
-
ns
SU
Pulse Width WE
t
4.5
4.5
20
25
-
-
-
-
25
31
-
-
-
-
30
38
-
-
-
-
ns
ns
W
Latch Time WE to RA0,
RA1
t
LATCH
Switching Specifications C = 50pF, Input t , t = 6ns
L
r f
o
o
-40 C TO
-55 C TO
o
o
o
25 C
TYP MAX
85 C
125 C
TEST
SYMBOL CONDITIONS
PARAMETER
HC TYPES
V
(V) MIN
MIN
MAX
MIN
MAX UNITS
CC
Propagation Delay
Reading Any Word
t
, t
PLH PHL
C
= 50pF
L
2
-
-
-
195
39
-
-
-
-
-
-
-
-
-
245
49
-
-
-
-
-
-
-
-
-
295
59
-
ns
ns
ns
ns
ns
ns
ns
ns
4.5
5
-
-
-
-
-
-
-
C
C
C
= 15pF
= 50pF
= 50pF
16
-
L
L
L
6
33
250
50
-
42
315
63
-
50
375
75
-
Write Enable to Output
t
, t
PLH PHL
2
-
4.5
5
-
C
C
= 15pF
= 50pF
21
-
L
6
43
54
64
L
5
TAOS [ TEXAS ADVANCED OPTOELECTRONIC SOLUTIONS ]
