TC74HC245APF 查看數據表（PDF） - Toshiba
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TC74HC245APF Datasheet PDF : 8 Pages
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TC74HC245AP/AF,640AP/AF
AC Characteristics (input: tr = tf = 6 ns)
Characteristics
Symbol
Output transition time
tTLH
tTHL
Test Condition
Ta = 25°C
Ta = −40~85°C
Unit
CL (pF) VCC (V) Min Typ. Max Min Max
2.0
⎯
52
60
⎯
75
⎯
50
4.5
⎯
7
12
⎯
15
ns
6.0
⎯
6
10
⎯
13
Propagation delay
tpLH
time
tpHL
2.0
⎯
33
90
⎯
115
50
4.5
⎯
12
18
⎯
23
6.0
⎯
10
15
⎯
20
⎯
ns
2.0
⎯
48
120
⎯
150
150
4.5
⎯
16
24
⎯
30
6.0
⎯
14
20
⎯
26
3-state output enable
time
tpZL
tpZH
RL = 1kΩ
2.0
⎯
48
150
⎯
190
50
4.5
⎯
16
30
⎯
38
6.0
⎯
14
26
⎯
32
ns
2.0
⎯
63
180
⎯
225
150
4.5
⎯
21
36
⎯
45
6.0
⎯
18
31
⎯
38
3-state output disable
time
tpLZ
tpHZ
RL = 1kΩ
2.0
⎯
37
150
⎯
190
50
4.5
⎯
17
30
⎯
38
ns
6.0
⎯
15
26
⎯
32
Input capacitance
Bus input capacitance
Power dissipation
capacitance
CIN
DIR, G
COUT
An, Bn
CPD
TC74HC245A
(Note) TC74HC640A
⎯
5
10
⎯
10
pF
⎯
13
⎯
⎯
⎯
pF
⎯
39
⎯
⎯
⎯
pF
⎯
37
⎯
⎯
⎯
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/8 (per bit)
5
2007-10-01
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