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TC74HC257AF 数据表(PDF) 4 Page - Toshiba Semiconductor

部件名 TC74HC257AF
功能描述  Quad 2-Channel Multiplexer (3-state)
Download  8 Pages
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制造商  TOSHIBA [Toshiba Semiconductor]
网页  http://www.semicon.toshiba.co.jp/eng
标志 TOSHIBA - Toshiba Semiconductor

TC74HC257AF 数据表(HTML) 4 Page - Toshiba Semiconductor

  TC74HC257AF Datasheet HTML 1Page - Toshiba Semiconductor TC74HC257AF Datasheet HTML 2Page - Toshiba Semiconductor TC74HC257AF Datasheet HTML 3Page - Toshiba Semiconductor TC74HC257AF Datasheet HTML 4Page - Toshiba Semiconductor TC74HC257AF Datasheet HTML 5Page - Toshiba Semiconductor TC74HC257AF Datasheet HTML 6Page - Toshiba Semiconductor TC74HC257AF Datasheet HTML 7Page - Toshiba Semiconductor TC74HC257AF Datasheet HTML 8Page - 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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