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M74HC646 Datasheet(PDF) 7 Page - STMicroelectronics

No. de pieza M74HC646
Descripción Electrónicos  HC648 OCTAL BUS TRANSCEIVER/REGISTER 3-STATE, INV. HC646 OCTAL BUS TRANSCEIVER/REGISTER 3-STATE
PDF  12 Pages
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Fabricante Electrónico  STMICROELECTRONICS [STMicroelectronics]
Página de inicio  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

M74HC646 Datasheet(HTML) 7 Page - STMicroelectronics

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AC ELECTRICAL CHARACTERISTICS (CL =50 pF, Input tr =tf =6 ns)
Symbol
Parameter
Test Conditions
Value
Unit
VCC
(V)
CL
(pF)
TA =25
oC
-40 to 85
oC
Min.
Typ.
Max.
Min.
Max.
tPLH
tPHL
Propagation Delay Time
(SELECT - BUS)
2.0
50
81
170
215
ns
4.5
23
34
43
6.0
20
29
37
2.0
150
98
210
265
ns
4.5
28
42
53
6.0
24
36
45
tPZL
tPZH
3-State Output Enable Time
(G, DIR)
2.0
50
RL =1 K
Ω
84
175
220
ns
4.5
24
35
44
6.0
20
30
37
2.0
150
RL =1 K
Ω
102
215
270
ns
4.5
29
43
54
6.0
25
37
46
tPLZ
tPHZ
Output Disable Time
(G, DIR)
2.0
50
RL =1 K
Ω
60
175
220
ns
4.5
23
35
44
6.0
20
30
37
fMAX
Maximum Clock Frequency
2.0
50
6
19
4.8
MHz
4.5
30
67
24
6.0
35
79
28
tW(H)
tW(L)
Minimum Clock Pulse Width
2.0
50
30
75
95
ns
4.5
7
15
19
6.0
6
13
16
ts
Minimum Set-up Time
2.0
50
16
50
65
ns
4.5
4
10
13
6.0
3
9
11
th
Minimum Hold Time
2.0
50
55
ns
4.5
5
5
6.0
5
5
CIN
Input Capacitance
5
10
10
pF
CI/O
Bus Terminal Capacitance
10
pF
CPD (*)
Power Dissipation Capacitance
for HC646
for HC648
39
38
pF
(*) 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 operting current can be obtained by the following equation. ICC(opr) = CPD
•VCC •fIN +ICC/8 (per bit)
M74HC646/648
7/12



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