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M54HC157 数据表(PDF) 6 Page - STMicroelectronics

部件名 M54HC157
功能描述  HC158 QUAD 2 CHANNEL MULTIPLEXER INV. HC157 QUAD 2 CHANNEL MULTIPLEXER
PDF  11 Pages
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制造商  STMICROELECTRONICS [STMicroelectronics]
网页  http://www.st.com
标志 STMICROELECTRONICS - STMicroelectronics

M54HC157 数据表(HTML) 6 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)
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
30
75
95
110
ns
4.5
8
151922
6.0
7
131619
tPLH
tPHL
Propagation
Delay Time
(A, B - Y)
2.0
30
100
125
150
ns
4.5
12
20
25
30
6.0
10
17
21
26
tPLH
tPHL
Propagation
Delay Time
(SELECT - Y)
2.0
50
125
155
190
ns
4.5
16
25
31
38
6.0
14
21
26
32
tPLH
tPHL
Propagation
Delay Time
(STROBE - Y)
2.0
36
115
145
175
ns
4.5
12
23
29
35
6.0
10
20
25
30
CIN
Input Capacitance
5
10
10
10
pF
CPD (*)
Power Dissipation
Capacitance
47
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/4 (per channel)
SWITCHING CHARACTERISTICS TEST CIR-
CUIT
TEST CIRCUIT ICC (Opr.)
INPUT WAVEFORM IS THE SAME AS THAT IN CASE OF
SWITCHING CHARACTERISTICS TEST.
M54/M74HC157 M54/M74HC158
6/11



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