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TC74HC257AP Folha de dados(PDF) 4 Page - Toshiba Semiconductor

Nome de Peças TC74HC257AP
Descrição Electrónicos  Quad 2-Channel Multiplexer (3-state)
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Fabricante Electrônico  TOSHIBA [Toshiba Semiconductor]
Página de início  http://www.semicon.toshiba.co.jp/eng
Logo TOSHIBA - Toshiba Semiconductor

TC74HC257AP Folha de dados(HTML) 4 Page - Toshiba Semiconductor

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TC74HC257AP/AF/AFN
2007-10-01
4
AC Characteristics (input: tr = tf = 6 ns)
Test Condition
Ta
= 25°C
Ta
= −40~85°C
Characteristics
Symbol
CL
(pF)
VCC
(V)
Min
Typ.
Max
Min
Max
Unit
Output transition time
tTLH
tTHL
50
2.0
4.5
6.0
20
6
5
60
12
10
75
15
13
ns
50
2.0
4.5
6.0
45
13
11
100
20
17
125
25
21
Propagation delay
time
(A, B-Y,
Y)
tpLH
tpHL
150
2.0
4.5
6.0
62
18
15
140
28
24
175
35
30
ns
50
2.0
4.5
6.0
45
13
11
100
20
17
125
25
21
Propagation delay
time
(SELECT-Y, Y)
tpLH
tpHL
150
2.0
4.5
6.0
62
18
15
140
28
24
175
35
30
ns
50
2.0
4.5
6.0
40
12
10
110
22
19
140
28
24
3-state output enable
time
tpZL
tpZH
RL = 1kΩ
150
2.0
4.5
6.0
57
17
14
150
30
26
190
38
33
ns
3-state output disable
time
tpLZ
tpHZ
RL = 1kΩ
50
2.0
4.5
6.0
28
14
13
140
28
24
175
35
30
ns
Input capacitance
CIN
5
10
10
pF
Output capacitance
COUT
10
pF
Power dissipation
capacitance
CPD
(Note)
47
pF
Note:
CPD is defined as the value of the internal equivalent capacitance which is calculated from the operating
current consumption without load.
Average operating current can be obtained by the equation:
ICC (opr) = CPD・VCC・fIN + ICC/4 (per bit)


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