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HC257 Scheda tecnica(PDF) 5 Page - STMicroelectronics

Il numero della parte HC257
Spiegazioni elettronici  QUAD 2 CHANNEL MULTIPLEXER 3-STATE
PDF  14 Pages
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Produttore elettronici  STMICROELECTRONICS [STMicroelectronics]
Homepage  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

HC257 Scheda tecnica(HTML) 5 Page - STMicroelectronics

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Table 7: AC Electrical Characteristics (Input tr = tf = 3ns)
(*) Voltage range is 3.3V
± 0.3V
(**) Voltage range is 5.0V
± 0.5V
Table 8: 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/4 (per
channel)
Symbol
Parameter
Test Condition
Value
Unit
VCC
(V)
CL
(pF)
TA = 25°C
-40 to 85°C
-55 to 125°C
Min.
Typ.
Max.
Min.
Max.
Min.
Max.
tPLH
tPHL
Propagation Delay
Time A, B to Y
3.3(*)
15
5.8
9.3
1.0
11.0
1.0
11.0
ns
3.3(*)
50
8.3
12.8
1.0
14.5
1.0
14.5
5.0(**)
15
3.6
5.9
1.0
7.0
1.0
7.0
5.0(**)
50
5.1
7.9
1.0
9.0
1.0
9.0
tPLH
tPHL
Propagation Delay
Time
SELECT to Y
3.3(*)
15
7.0
11.0
1.0
13.0
1.0
13.0
ns
3.3(*)
50
9.5
14.5
1.0
16.5
1.0
16.5
5.0(**)
15
4.0
6.8
1.0
8.0
1.0
8.0
5.0(**)
50
5.5
8.8
1.0
10.0
1.0
10.0
tPZL
tPZH
Output Enable
Time
3.3(*)
15
RL = 1KΩ
6.7
10.5
1.0
12.5
1.0
12.5
ns
3.3(*)
50
RL = 1KΩ
9.2
14.0
1.0
16.0
1.0
16.0
5.0(**)
15
RL = 1KΩ
3.6
6.8
1.0
8.0
1.0
8.0
5.0(**)
50
RL = 1KΩ
5.1
8.8
1.0
10.0
1.0
10.0
tPLZ
tPHZ
Output Disable
Time
3.3(*)
50
RL = 1KΩ
8.6
12.0
1.0
13.5
1.0
13.5
ns
5.0(**)
50
RL = 1KΩ
5.7
7.9
1.0
9.0
1.0
9.0
Symbol
Parameter
Test Condition
Value
Unit
TA = 25°C
-40 to 85°C
-55 to 125°C
Min.
Typ.
Max.
Min.
Max.
Min.
Max.
CIN
Input Capacitance
610
10
10
pF
COUT
Output
Capacitance
8pF
CPD
Power Dissipation
Capacitance
(note 1)
18
pF



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