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參數(shù)資料
| 型號： | M54HC643B1R |
| 廠商： | 意法半導(dǎo)體 |
| 英文描述： | OCTAL BUS TRANSCEIVER 3-STATE: HC245 NON INVERTING HC640 INVERTING, HC643 INVERTING/NON INVERTING |
| 中文描述： | 八路總線收發(fā)器3種狀態(tài)：HC245非反相HC640反轉(zhuǎn)，HC643反向/非反相 |
| 文件頁數(shù)： | 5/11頁 |
| 文件大?。?/td> | 266K |
| 代理商： | M54HC643B1R |
AC ELECTRICAL CHARACTERISTICS
(C
L
= 50 pF, Input t
r
= t
f
= 6 ns)
Symbol
Parameter
Test Conditions
Value
-40 to 85
o
C
74HC
Min.
Unit
V
CC
(V)
C
L
(pF)
T
A
= 25
o
C
54HC and 74HC
Min.
Typ.
25
-55 to 125
o
C
54HC
Min.
Max.
60
12
10
90
18
15
120
24
20
150
30
26
180
36
31
150
30
26
10
Max.
75
19
13
115
23
20
150
30
26
190
38
32
225
45
38
190
38
32
10
Max.
90
18
15
135
27
23
180
36
31
225
45
38
270
54
46
225
45
38
10
t
TLH
t
THL
Output Transition
Time
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
ns
7
6
t
PLH
t
PHL
Propagation
Delay Time
50
33
12
10
48
16
14
48
16
14
63
21
18
37
17
15
5
13
ns
150
ns
t
PZL
t
PZH
Output Enable
Time
50
R
L
= 1K
ns
150
R
L
= 1K
ns
t
PLZ
t
PHZ
Output Disable
Time
50
R
L
= 1K
ns
C
IN
C
I/OUT
Input Capacitance
Output
Capacitance
Power Dissipation
Capacitance
DIR, G
An, Bn
pF
pF
C
PD
(*)
HC245
HC640/643
39
37
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 circuit)
M54/M74HC245/640/643
5/11
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