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DM74ALS646 Folha de dados(PDF) 4 Page - Fairchild Semiconductor

Nome de Peças DM74ALS646
Descrição Electrónicos  Octal 3-STATE Bus Transceiver and Register
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Fabricante Electrônico  FAIRCHILD [Fairchild Semiconductor]
Página de início  http://www.fairchildsemi.com
Logo FAIRCHILD - Fairchild Semiconductor

DM74ALS646 Folha de dados(HTML) 4 Page - Fairchild Semiconductor

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4
Switching Characteristics
over recommended operating free air temperature range
Note 5: These parameters are measured with the internal output state of the storage register opposite to that of the bus input.
Symbol
Parameter
Conditions
From (Input)
Min
Max
Units
To (Output)
tPLH
Propagation Delay Time
VCC = 4.5V to 5.5V,
CBA or CAB
10
30
ns
LOW-to-HIGH Level Output
CL = 50 pF,
to A or B
tPHL
Propagation Delay Time
R1 = R2 = 500Ω,CBA or CAB
517
ns
HIGH-to-LOW Level Output
TA = Min to Max
to A or B
tPLH
Propagation Delay Time
A or B to
520
ns
LOW-to-HIGH Level Output
B or A
tPHL
Propagation Delay Time
A or B to
312
ns
HIGH-to-LOW Level Output
B or A
tPLH
Propagation Delay Time
SBA or SAB
LOW-to-HIGH Level Output
to A or B
12
35
ns
(with A or B LOW) (Note 5)
tPHL
Propagation Delay Time
SBA or SAB
HIGH-to-LOW Level Output
to A or B
5
20
ns
(with A or B LOW) (Note 5)
tPLH
Propagation Delay Time
SBA or SAB
LOW-to-HIGH Level Output
to A or B
6
25
ns
(with A or B HIGH) (Note 5)
tPHL
Propagation Delay Time
SBA or SAB
HIGH-to-LOW Level Output
to A or B
5
20
ns
(with A or B HIGH) (Note 5)
tPZH
Output Enable Time
G to
317
ns
to HIGH Level Output
A or B
tPZL
Output Enable Time
G to
520
ns
to LOW Level Output
A or B
tPHZ
Output Disable Time
G to
110
ns
from HIGH Level Output
A or B
tPLZ
Output Disable Time
G to
216
ns
from LOW Level Output
A or B
tPZH
Output Enable Time
DIR to
630
ns
to HIGH Level Output
A or B
tPZL
Output Enable Time
DIR to
525
ns
to LOW Level Output
A or B
tPHZ
Output Disable Time
DIR to
110
ns
from HIGH Level Output
A or B
tPLZ
Output Disable Time
DIR to
216
ns
from LOW Level Output
A or B


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