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TC74HC640AF Datasheet(PDF) 5 Page - Toshiba Semiconductor

Part # TC74HC640AF
Description  Octal Bus Transceiver
PDF  8 Pages
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Manufacturer  TOSHIBA [Toshiba Semiconductor]
Direct Link  http://www.semicon.toshiba.co.jp/eng
Logo TOSHIBA - Toshiba Semiconductor

TC74HC640AF Datasheet(HTML) 5 Page - Toshiba Semiconductor

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TC74HC245AP/AF,640AP/AF
2007-10-01
5
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
⎯
⎯
⎯
52
7
6
60
12
10
⎯
⎯
⎯
75
15
13
ns
50
2.0
4.5
6.0
⎯
⎯
⎯
33
12
10
90
18
15
⎯
⎯
⎯
115
23
20
Propagation delay
time
tpLH
tpHL
⎯
150
2.0
4.5
6.0
⎯
⎯
⎯
48
16
14
120
24
20
⎯
⎯
⎯
150
30
26
ns
50
2.0
4.5
6.0
⎯
⎯
⎯
48
16
14
150
30
26
⎯
⎯
⎯
190
38
32
3-state output enable
time
tpZL
tpZH
RL = 1kΩ
150
2.0
4.5
6.0
⎯
⎯
⎯
63
21
18
180
36
31
⎯
⎯
⎯
225
45
38
ns
3-state output disable
time
tpLZ
tpHZ
RL = 1kΩ
50
2.0
4.5
6.0
⎯
⎯
⎯
37
17
15
150
30
26
⎯
⎯
⎯
190
38
32
ns
Input capacitance
CIN
DIR, G
⎯
5
10
⎯
10
pF
Bus input capacitance
COUT
An, Bn
⎯
13
⎯
⎯
⎯
pF
TC74HC245A
⎯
39
⎯
⎯
⎯
Power dissipation
capacitance
CPD
(Note) TC74HC640A
⎯
37
⎯
⎯
⎯
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/8 (per bit)



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