74ACQ646SCX 查看數據表（PDF） - Fairchild Semiconductor
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74ACQ646SCX Datasheet PDF : 10 Pages
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AC Electrical Characteristics for ACTQ
VCC
TA = +25°C
TA = −40°C to +85°C
Symbol
Parameter
(V)
CL = 50 pF
CL = 50 pF
Units
(Note 17)
Min
Typ
Max
Min
Max
tPLH
tPHL
tPLH
tPHL
tPLH
tPHL
tPZH
tPZL
tPHZ
tPLZ
tPZH
tPZL
tPHZ
tPLZ
tOSHL
tOSLH
Propagation Delay
Clock to Bus
Propagation Delay
Bus to Bus
Propagation Delay
SBA or SAB to An or Bn
(w/An or Bn HIGH or LOW)
Enable Time
G to An or Bn
Disable Time
G to An or Bn
Enable Time
DIR to An or Bn
Disable Time
DIR to An or Bn
Output to Output
Skew (Note 18) Select to Bus
or Clock to Bus
5.0
2.5
8.5
10.5
2.5
11.0
ns
5.0
2.0
8.0
10.0
2.0
10.5
ns
5.0
2.5
8.5
10.5
2.5
11.0
ns
5.0
2.5
10.0
12.0
2.5
12.5
ns
5.0
1.0
7.0
8.5
1.0
9.0
ns
5.0
2.5
10.0
12.0
2.5
12.5
ns
5.0
1.0
7.0
8.5
1.0
9.0
ns
5.0
0.5
1.0
1.0
ns
tOSHL
tOSLH
Output to Output
Skew (Note 18)
Bus to Bus
5.0
1.0
1.5
1.5
ns
Note 17: Voltage Range 5.0 is 5.0V ± 0.5V
Note 18: Skew is defined as the absolute value of the difference between the actual propagation delay for any two outputs within the same packaged device.
The specification applies to any outputs switching in the same direction, either HIGH-to-LOW (tOSHL) or LOW-to-HIGH (tOSLH). Parameter guaranteed by
design. Not tested.
AC Operating Requirements for ACTQ
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 19: Voltage Range 5.0 is 5.0V ± 0.5V
VCC
(V)
(Note 19)
5.0
5.0
5.0
TA = +25°C
CL = 50 pF
Typ
TA = −40°C to +85°C
CL = 50 pF
Guaranteed Minimum
3.0
3.0
1.5
1.5
4.0
4.0
Units
ns
ns
ns
Capacitance
Symbol
CIN
CI/O
CPD
Parameter
Input Capacitance
Input/Output Capacitance
Power Dissipation Capacitance
Typ
4.5
15.0
90.0
Units
pF
pF
pF
VCC = OPEN
VCC = 5.0V
VCC = 5.0V
Conditions
7
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