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M74HCT643 データシート(PDF) 5 Page - STMicroelectronics

部品番号 M74HCT643
部品情報  OCTAL BUS TRANSCEIVER3-STATE: HCT245 NON INVERTING HCT640 INVERTING, HCT643 INVERTING/NON INVERTING
PDF  11 Pages
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メーカー  STMICROELECTRONICS [STMicroelectronics]
ホームページ  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

M74HCT643 データシート(HTML) 5 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
54HC and 74HC
-40 to 85
oC
74HC
-55 to 125
oC
54HC
Min.
Typ.
Max.
Min.
Max.
Min.
Max.
tTLH
tTHL
Output Transition
Time
4.5
50
7
12
15
18
ns
tPLH
tPHL
Propagation
Delay Time
4.5
50
13
22
28
33
ns
4.5
150
18
30
38
45
ns
tPZL
tPZH
Output Enable
Time
4.5
50
RL =1K
Ω
19
30
38
45
ns
4.5
150
RL =1K
Ω
24
38
48
57
ns
tPLZ
tPHZ
Output Disable
Time
4.5
50
RL =1K
Ω
17
30
38
45
ns
CIN
Input Capacitance
DIR, G
5
10
10
10
pF
CI/OUT
Output
Capacitance
An, Bn
13
pF
CPD (*)
Power Dissipation
Capacitance
HCT245
HCT640/643
41
39
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 circuit)
SWITCHING CHARACTERISTICS TEST WAVEFORM
M54/M74HCT245/640/643
5/11



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