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CD74HC670 Datasheet, PDF (5/9 Pages) Texas Instruments – High-Speed CMOS Logic 4x4 Register File
◁
CD74HC670, CD74HCT670
Prerequisite for Switching Specifications
PARAMETER
HC TYPES
Setup Time
Data to WE
Write to WE
Hold Time
Data to WE
Write to WE
Pulse Width WE
Latch Time WE to RA0,
RA1
HCT TYPES
Setup Time
Data to WE
Hold Time
Data to WE
Write to WE
Setup Time
Write to WE
Pulse Width WE
Latch Time WE to RA0,
RA1
SYMBOL VCC (V) MIN
tSU, th
2
60
4.5
12
6
10
tH, tW
2
5
4.5
5
6
5
tW
2
80
4.5
16
6
14
tLATCH
2
100
4.5
20
6
17
tSU, th
4.5
12
tH, tW
4.5
5
tSU
4.5
18
tW
4.5
20
tLATCH
4.5
25
25oC
TYP
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
MAX
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-40oC TO 85oC
MIN TYP MAX
75
-
-
15
-
-
13
-
-
5
-
-
5
-
-
5
-
-
100
-
-
20
-
-
17
-
-
125
-
-
25
-
-
21
-
-
15
-
-
5
-
-
23
-
-
25
-
-
31
-
-
-55oC TO 125oC
MIN TYP MAX UNITS
90
-
18
-
15
-
5
-
5
-
5
-
120
-
24
-
20
-
150
-
30
-
26
-
-
ns
-
ns
-
ns
-
ns
-
ns
-
ns
-
ns
-
ns
-
ns
-
ns
-
ns
-
ns
18
-
5
-
-
ns
-
ns
27
-
30
-
38
-
-
ns
-
ns
-
ns
Switching Specifications CL = 50pF, Input tr, tf = 6ns
PARAMETER
HC TYPES
Propagation Delay
Reading Any Word
Write Enable to Output
TEST
SYMBOL CONDITIONS VCC (V) MIN
tPLH, tPHL CL = 50pF
2
-
4.5
-
CL = 15pF
5
-
CL = 50pF
6
-
tPLH, tPHL CL = 50pF
2
-
4.5
-
CL = 15pF
5
-
CL = 50pF
6
-
25oC
TYP MAX
- 195
-
39
16
-
-
33
- 250
-
50
21
-
-
43
-40oC TO
85oC
MIN MAX
-
245
-
49
-
-
-
42
-
315
-
63
-
-
-
54
-55oC TO
125oC
MIN MAX UNITS
-
295 ns
-
59
ns
-
-
ns
-
50
ns
-
375 ns
-
75
ns
-
-
ns
-
64
ns
5
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