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74AC157 データシート(PDF) 5 Page - STMicroelectronics

部品番号 74AC157
部品情報  QUAD 2 CHANNEL MULTIPLEXER
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メーカー  STMICROELECTRONICS [STMicroelectronics]
ホームページ  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

74AC157 データシート(HTML) 5 Page - STMicroelectronics

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AC ELECTRICAL CHARACTERISTICS (CL = 50 pF, RL = 500 Ω, Input tr = tf = 3ns)
(*) Voltage range is 3.3V
± 0.3V
(**) Voltage range is 5.0V
± 0.5V
CAPACITIVE CHARACTERISTICS
1) 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 operating current can be obtained by the following equation. ICC(opr) = CPD x VCC x fIN + ICC/n (per circuit)
TEST CIRCUIT
CL = 50pF or equivalent (includes jig and probe capacitance)
RL = R1 = 500Ω or equivalent
RT = ZOUT of pulse generator (typically 50Ω)
Symbol
Parameter
Test Condition
Value
Unit
VCC
(V)
TA = 25°C
-40 to 85°C
-55 to 125°C
Min.
Typ.
Max.
Min.
Max.
Min.
Max.
tPLH tPHL Propagation Delay
Time
SELECT to Y
3.3(*)
1.5
6.5
11.0
1.5
12.0
1.5
12.0
ns
5.0(**)
1.5
5.0
8.5
1.5
9.5
1.5
9.5
tPLH tPHL Propagation Delay
Time
STROBE to Y
3.3(*)
1.5
6.5
11.0
1.5
12.0
1.5
12.0
ns
5.0(**)
1.5
5.5
9.0
1.5
10.0
1.5
10.0
tPLH tPHL Propagation Delay
Time
A, B to Y
3.3(*)
1.5
5.0
8.0
1.5
9.0
1.5
9.0
ns
5.0(**)
1.5
4.0
6.5
1.5
7.0
1.5
7.0
Symbol
Parameter
Test Condition
Value
Unit
VCC
(V)
TA = 25°C
-40 to 85°C
-55 to 125°C
Min.
Typ.
Max.
Min.
Max.
Min.
Max.
CIN
Input Capacitance
5.0
5
pF
CPD
Power Dissipation
Capacitance
(note 1)
5.0
fIN = 10MHz
33
pF


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