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參數(shù)資料
| 型號： | SNJ54HCT646FK |
| 廠商： | Texas Instruments, Inc. |
| 元件分類： | 通用總線功能 |
| 英文描述： | OCTAL BUS TRANSCEIVERS AND REGISTERS WITH 3-STATE OUTPUTS |
| 中文描述： | 八路總線收發(fā)器和寄存器具有三態(tài)輸出 |
| 文件頁數(shù)： | 6/11頁 |
| 文件大?。?/td> | 261K |
| 代理商： | SNJ54HCT646FK |
SN54HCT646, SN74HCT646
OCTAL BUS TRANSCEIVERS AND REGISTERS
WITH 3-STATE OUTPUTS
SCLS178C
–
MARCH 1984
–
REVISED MARCH 2003
6
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
switching characteristics over recommended operating free-air temperature range, C
L
= 50 pF
(unless otherwise noted) (see Figure 2)
PARAMETER
FROM
(INPUT)
TO
VCC
TA = 25
°
C
TYP
SN54HCT646
MIN
22
SN74HCT646
MIN
27
UNIT
(OUTPUT)
MIN
31
MAX
MAX
MAX
fmax
4.5 V
54
MHz
5.5 V
36
64
24
29
CLKBA or CLKAB
A or B
4.5 V
18
36
54
45
5.5 V
16
32
49
41
td
tpd
A or B
B or A
4.5 V
14
27
41
34
ns
5.5 V
12
24
37
31
SBA or SAB
A or B
4.5 V
20
38
57
48
5.5 V
17
34
51
43
ten
OE
A or B
4.5 V
25
49
74
61
ns
5.5 V
22
44
67
55
tdis
OE
A or B
4.5 V
25
49
74
61
ns
5.5 V
22
44
67
55
ten
DIR
A or B
4.5 V
25
49
74
61
ns
5.5 V
22
44
67
55
tdis
DIR
A or B
4.5 V
25
49
74
61
ns
5.5 V
22
44
67
55
tt
Any
4.5 V
5.5 V
9
7
12
11
18
16
15
14
ns
These parameters are measured with the internal output state of the storage register opposite that of the bus input.
switching characteristics over recommended operating free-air temperature range, C
L
= 150 pF
(unless otherwise noted) (see Figure 2)
PARAMETER
FROM
(INPUT)
TO
VCC
TA = 25
°
C
TYP
SN54HCT646
MIN
SN74HCT646
MIN
UNIT
(OUTPUT)
MIN
MAX
MAX
MAX
CLKBA or CLKAB
A or B
4.5 V
24
53
80
66
5.5 V
22
47
52
60
td
tpd
A or B
B or A
4.5 V
22
44
67
55
ns
5.5 V
20
39
60
50
SBA or SAB
A or B
4.5 V
26
55
83
69
5.5 V
24
49
74
62
OE
A or B
4.5 V
33
66
100
87
ten
5.5 V
22
59
90
74
ns
DIR
A or B
4.5 V
33
66
100
87
5.5 V
22
59
90
74
tt
Any
4.5 V
5.5 V
17
14
42
38
63
57
53
48
ns
These parameters are measured with the internal output state of the storage register opposite that of the bus input.
operating characteristics, T
A
= 25
°
C
PARAMETER
TEST CONDITIONS
TYP
UNIT
Cpd
Power dissipation capacitance
No load
50
pF
PRODUCT PREVIEW information concerns products in the formative or
design phase of development. Characteristic data and other
specifications are design goals. Texas Instruments reserves the right to
change or discontinue these products without notice.
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