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參數(shù)資料
| 型號(hào)： | M74HC648B1R |
| 廠商： | 意法半導(dǎo)體 |
| 元件分類： | 通用總線功能 |
| 英文描述： | CAP 68NF 305VAC EMI SUPPRESSN |
| 中文描述： | HC648八路總線收發(fā)器/注冊(cè)三態(tài)，刑事調(diào)查。 HC646八路總線收發(fā)器/注冊(cè)三態(tài) |
| 文件頁數(shù)： | 7/12頁 |
| 文件大?。?/td> | 202K |
| 代理商： | M74HC648B1R |
AC ELECTRICAL CHARACTERISTICS
(C
L
= 50 pF, Input t
r
= t
f
= 6 ns)
Symbol
Parameter
Test Conditions
V
CC
(V)
(pF)
Value
Unit
C
L
T
A
= 25
o
C
Min.
Typ.
-40 to 85
o
C
Min.
Max.
170
34
29
210
42
36
175
35
30
215
43
37
175
35
30
Max.
215
43
37
265
53
45
220
44
37
270
54
46
220
44
37
t
PLH
t
PHL
Propagation Delay Time
(SELECT - BUS)
2.0
4.5
6.0
2.0
4.5
6.0
2.0
4.5
6.0
2.0
4.5
6.0
2.0
4.5
6.0
2.0
4.5
6.0
2.0
4.5
6.0
2.0
4.5
6.0
2.0
4.5
6.0
50
81
23
20
98
28
24
84
24
20
102
29
25
60
23
20
19
67
79
30
7
6
16
4
3
ns
150
ns
t
PZL
t
PZH
3-State Output Enable Time
(G, DIR)
50
R
L
= 1 K
ns
150
R
L
= 1 K
ns
t
PLZ
t
PHZ
Output Disable Time
(G, DIR)
50
R
L
= 1 K
ns
f
MAX
Maximum Clock Frequency
50
6
30
35
4.8
24
28
MHz
t
W(H)
t
W(L)
Minimum Clock Pulse Width
50
75
15
13
50
10
9
5
5
5
10
95
19
16
65
13
11
5
5
5
10
ns
t
s
Minimum Set-up Time
50
ns
t
h
Minimum Hold Time
50
ns
C
IN
C
I/O
C
PD
(*)
Input Capacitance
Bus Terminal Capacitance
Power Dissipation Capacitance
5
pF
pF
10
39
38
for HC646
for HC648
pF
(*) C
PD
isdefined asthe value ofthe IC’sinternal equivalent capactance which is calculated from the operating current consumption without load.
(Refer to Test Circuit).Average operting current can be obtained by thefollowingequation. I
CC
(opr) = C
PD
V
CC
f
IN
+ I
CC
/8(per bit)
M74HC646/648
7/12
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