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74VHC157 Scheda tecnica(PDF) 4 Page - STMicroelectronics

Il numero della parte 74VHC157
Spiegazioni elettronici  QUAD 2 CHANNEL MULTIPLEXER
PDF  9 Pages
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Produttore elettronici  STMICROELECTRONICS [STMicroelectronics]
Homepage  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

74VHC157 Scheda tecnica(HTML) 4 Page - STMicroelectronics

  74VHC157 Datasheet HTML 1Page - STMicroelectronics 74VHC157 Datasheet HTML 2Page - STMicroelectronics 74VHC157 Datasheet HTML 3Page - STMicroelectronics 74VHC157 Datasheet HTML 4Page - STMicroelectronics 74VHC157 Datasheet HTML 5Page - STMicroelectronics 74VHC157 Datasheet HTML 6Page - STMicroelectronics 74VHC157 Datasheet HTML 7Page - STMicroelectronics 74VHC157 Datasheet HTML 8Page - STMicroelectronics 74VHC157 Datasheet HTML 9Page - STMicroelectronics  
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CAPACITIVE CHARACTERISTICS
Symb ol
Parameter
T est Cond ition s
Val ue
Un it
TA =25
oC
-40 to 85
oC
Min.
Typ .
Max.
Min .
Max.
CIN
Input Capacitance
4
10
10
pF
CPD
Power Dissipation
Capacitance (note 1)
20
pF
1) CPD isdefined as the value of the IC’sinternal equivalent capacitance which is calculated fromthe operating current consumption without load. (Referto
Test Circuit).Average operating current can be obtained by the following equation. ICC(opr) = CPD
• VCC • fIN +ICC/4 (per Channel)
AC ELECTRICAL CHARACTERISTICS (Input tr =tf =3 ns)
Symb ol
Parameter
Test Co nditi on
Val ue
Un it
VCC
(V)
CL
(pF )
TA =25
oC
-40 to 85
oC
Min.
Typ .
Max.
Min .
Max.
tPLH
tPHL
Propagation Delay
Time
A, B to Y
3.3
(*)
15
6.2
9.7
1.0
11.5
ns
3.3
(*)
50
8.7
13.2
1.0
15.0
5.0
(**)
15
4.1
6.4
1.0
7.5
5.0
(**)
50
5.6
8.4
1.0
9.5
tPLH
tPHL
Propagation Delay
Time
SELECT to Y
3.3
(*)
15
8.4
13.2
1.0
15.5
ns
3.3
(*)
50
10.9
16.7
1.0
19.0
5.0
(**)
15
5.3
8.1
1.0
9.5
5.0
(**)
50
6.8
10.1
1.0
11.5
tPLH
tPHL
Propagation Delay
Time
STROBE to Y
3.3
(*)
15
8.7
13.6
1.0
16.0
ns
3.3
(*)
50
11.2
17.1
1.0
19.5
5.0
(**)
15
5.6
8.6
1.0
10.0
5.0
(**)
50
7.1
10.6
1.0
12.0
(*) Voltage range is 3.3V
± 0.3V
(**) Voltage range is 5V
± 0.5V
74VHC157
4/9



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