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74LVQ157 Datasheet(PDF) 4 Page - STMicroelectronics

Part No. 74LVQ157
Description  LOW VOLTAGE QUAD 2 CHANNEL MULTIPLEXER
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Maker  STMICROELECTRONICS [STMicroelectronics]
Homepage  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

74LVQ157 Datasheet(HTML) 4 Page - STMicroelectronics

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CAPACITIVE CHARACTERISTICS
Symb ol
Parameter
Test Co nditi ons
Valu e
Un it
VCC
(V)
TA =25
oC
-40 to 85
oC
Min.
T yp.
Max.
Mi n.
Max.
CIN
Input Capacitance
3.3
5
pF
CPD
Power Dissipation
Capacitance (note 1)
3.3
fIN =10 MHz
24
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 operting current can be obtained by the following equation. ICC(opr) = CPD
• VCC • fIN +ICC/4(per channel)
TEST CIRCUIT
AC ELECTRICAL CHARACTERISTICS (CL = 50 pF, RL = 500
Ω, Input tr =tf =3 ns)
Symb ol
Parameter
T est Con ditio n
Valu e
Un it
VCC
(V)
TA =25
oC
-40 to 85
oC
Min.
T yp.
Max.
Mi n.
Max.
tPLH
tPHL
Propagation Delay Time
(SELECT-Y)
2.7
7.5
15
17
ns
3.3
(*)
6.5
11
12
tPLH
tPHL
Propagation Delay Time
(STROBE-Y)
2.7
7
15
17
ns
3.3
(*)
611
12
tPLH
tPHL
Propagation Delay Time
(A,B-Y)
2.7
6
11
13
ns
3.3
(*)
58
9
tOSLH
tOSHL
Output to Output Skew
Time (note 1, 2)
2.7
0.5
1.5
1.5
ns
3.3
(*)
0.5
1.5
1.5
1) Skew is defined as the absolute value of the difference between the actual propagation delay for any twooutputs of the same device switching in the
same direction, either HIGH or LOW (tOSLH =|tPLHm -tPLHn|, tOSHL =|tPHLm -tpHLn|)
2) Parameter guaranteed by design
(*) Voltage range is 3.3V
± 0.3V
CL = 50 pF or equivalent (includes jigand probe capacitance)
RL =R1 =500
Ω orequivalent
RT =ZOUT of pulse generator (typically 50
Ω)
74LVQ157
4/8


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