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M74HC640 数据表(PDF) 5 Page - STMicroelectronics

部件名 M74HC640
功能描述  OCTAL BUS TRANSCEIVER WITH 3 STATE OUTPUTS (INVERTING)
PDF  11 Pages
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制造商  STMICROELECTRONICS [STMicroelectronics]
网页  http://www.st.com
标志 STMICROELECTRONICS - STMicroelectronics

M74HC640 数据表(HTML) 5 Page - STMicroelectronics

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AC ELECTRICAL CHARACTERISTICS (CL = 50 pF, Input tr = tf = 6ns)
CAPACITIVE CHARACTERISTICS
1) CPD is defined as the value of the IC’s internal equivalent capacitance which is calculated from the operating current consumption without
load. (Refer to Test Circuit). Average operating current can be obtained by the following equation. ICC(opr) = CPD x VCC x fIN + ICC/8 (per circuit)
Symbol
Parameter
Test Condition
Value
Unit
VCC
(V)
CL
(pF)
TA = 25°C
-40 to 85°C
-55 to 125°C
Min.
Typ.
Max.
Min.
Max.
Min.
Max.
tTLH tTHL Output Transition
Time
2.0
50
25
60
75
90
ns
4.5
7
121918
6.0
6
101315
tPLH tPHL Propagation Delay
Time
2.0
50
33
90
115
135
ns
4.5
12
18
23
27
6.0
10
15
20
23
2.0
150
48
120
150
180
ns
4.5
16
24
30
36
6.0
14
20
26
31
tPZL tPZH High Impedance
Output Enable
Time
2.0
50
RL = 1 KΩ
48
150
190
225
ns
4.5
16
30
38
45
6.0
14
26
32
38
2.0
150
RL = 1 KΩ
63
180
225
270
ns
4.5
21
36
45
54
6.0
18
31
38
46
tPLZ tPHZ High Impedance
Output Disable
Time
2.0
50
RL = 1 KΩ
37
150
190
225
ns
4.5
17
30
38
45
6.0
15
26
32
38
Symbol
Parameter
Test Condition
Value
Unit
VCC
(V)
TA = 25°C
-40 to 85°C
-55 to 125°C
Min.
Typ.
Max.
Min.
Max.
Min.
Max.
CIN
Input Capacitance
DIR, G
5
101010
pF
CI/OUT
Output
Capacitance
An, Bn
13
pF
CPD
Power Dissipation
Capacitance (note
1)
37
pF



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