74AC646 Ver la hoja de datos (PDF) - Fairchild Semiconductor
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74AC646 Datasheet PDF : 9 Pages
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AC Electrical Characteristics for ACT
Symbol
Parameter
tPLH
Propagation Delay
Clock to Bus
tPHL
Propagation Delay
Clock to Bus
tPLH
Propagation Delay
Bus to Bus
tPHL
Propagation Delay
Bus to Bus
tPLH
Propagation Delay
SBA or SAB to An to Bn
(w/An or Bn, HIGH or LOW)
tPHL
Propagation Delay
SBA or SAB to An to Bn
(w/An or Bn, HIGH or LOW)
tPZH
Enable Time
G to An or Bn
tPZL
Enable Time
G to An or Bn
tPHZ
Disable Time
G to An or Bn
tPLZ
Disable Time
G to An or Bn
tPZH
Enable Time
DIR to An or Bn
tPZL
Enable Time
DIR to An or Bn
tPHZ
Disable Time
DIR to An or Bn
tPLZ
Disable Time
DIR to An or Bn
Note 10: Voltage Range 5.0 is 5.0V ± 0.5V
VCC
(V)
(Note 10)
Min
5.0
3.5
5.0
4.0
5.0
3.0
5.0
2.5
5.0
3.0
5.0
3.0
5.0
2.0
5.0
3.5
5.0
5.0
5.0
3.5
5.0
2.0
5.0
3.5
5.0
5.0
5.0
3.5
AC Operating Requirements for ACT
Symbol
Parameter
tS
Setup Time, HIGH or LOW
BUS to Clock
tH
Hold Time, HIGH or LOW
Bus to Clock
tW
Clock Pulse Width
HIGH or LOW
Note 11: Voltage Range 5.0 is 5.0V ± 0.5V
VCC
(V)
(Note 11)
5.0
5.0
5.0
Capacitance
Symbol
Parameter
Typ
CIN
Input Capacitance
4.5
CI/O
Input/Output Capacitance
15.0
CPD
Power Dissipation Capacitance
60.0
TA = +25°C
CL = 50 pF
Typ
12.0
Max
14.5
12.0
14.5
8.5
10.5
8.5
10.5
TA = −40°C to +85°C
CL = 50 pF
Min
Max
3.0
16.0
3.5
16.0
2.5
11.5
2.0
11.5
9.5
11.5
2.5
12.5
9.5
11.5
2.5
12.5
9.0
11.0
1.5
12.0
9.0
11.0
3.0
12.0
10.5
13.0
4.5
14.5
10.0
12.5
3.0
14.0
6.5
10.5
1.5
11.5
6.5
10.5
3.0
11.5
8.5
12.5
4.5
13.5
8.5
12.5
3.0
13.5
TA = +25°C
CL = 50 pF
Typ
TA = −40°C to +85°C
CL = 50 pF
Guaranteed Minimum
2.5
7.0
8.0
0
2.5
2.5
4.5
7.0
8.0
Units
pF
pF
pF
VCC = OPEN
VCC = 5.0V
VCC = 5.0V
Conditions
Units
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
Units
ns
ns
ns
7
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