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M74HCT368 데이터시트(PDF) 5 Page - STMicroelectronics

부품명 M74HCT368
상세설명  HEX BUS BUFFER 3-STATE HCT367 NONINVERTING, HCT368 INVERTING
PDF  11 Pages
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제조업체  STMICROELECTRONICS [STMicroelectronics]
홈페이지  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

M74HCT368 데이터시트(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
2.0
50
7
12
15
18
ns
tPLH
tPHL
Propagation
Delay Time
(for HCT367 only)
2.0
50
14
22
28
33
ns
2.0
150
18
28
35
42
tPLH
tPHL
Propagation
Delay Time
(for HCT368 only)
2.0
50
15
24
30
36
ns
2.0
150
19
30
38
45
tPZL
tPZH
Output Enable
Time
2.0
50
16
25
31
38
ns
2.0
150
20
31
39
47
tPLZ
tPHZ
Output Disable
Time
2.0
50
18
25
31
38
ns
CIN
Input Capacitance
5
10
10
10
pF
CPD (*)
Power Dissipation
Capacitance
fot HCT367
for HCT368
47
55
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/6 (per Channel)
TEST CIRCUIT ICC (Opr.)
* INPUT WAVEFORM IS THE SAME AS THAT IN CASE OF
SWITCHING CHARACTERISTICS TEST.
CPD CALCULATION
CPD is to be calculated with the following
formula by using the measured value of
ICC (opr.) in the test circuit opposite.
CPD =
ICC (opr)
fIN
× VCC
In determining the typical value of CPD,a
relatively high frequency of 1 MHz was ap-
plied to fIN, in order to eliminate any error
caused by the quiescent supply current.
M54/M74HCT367/368
5/11



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