74ACTQ821 Ver la hoja de datos (PDF) - Fairchild Semiconductor
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74ACTQ821 Datasheet PDF : 7 Pages
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DC Electrical Characteristics (Continued)
Note 2: All outputs loaded; thresholds on input associated with output under test.
Note 3: Maximum test duration 2.0 ms, one output loaded at a time.
Note 4: DIP package.
Note 5: Max number of outputs defined as (n). Data inputs are driven 0V to 3V. One output @ GND.
Note 6: Maximum number of data inputs (n) switching. (n−1) inputs switching 0V to 3V. Input-under-test switching: 3V to threshold (VILD),
0V to threshold (VIHD), f = 1 MHz.
AC Electrical Characteristics
VCC
TA = + 25°C
TA = − 40°C to + 85°C
Symbol
Parameter
(V)
CL = 50 pF
CL = 50 pF
Units
(Note 7)
Min
Typ
Max
Min
Max
fMAX
Maximum Clock
Frequency
5.0
120
110
MHz
tPLH
Propagation Delay
tPHL
CP to On
tPZH
Output Enable Time
tPZL
OE to On
tPHZ
Output Disable Time
tPLZ
OE to On
tOSLH
Output to Output Skew
tOSHL
CP to On (Note 8)
Note 7: Voltage Range 5.0 is 5.0V ± 0.5V
5.0
3.0
6.5
9.5
2.5
10.5
ns
5.0
3.0
7.5
10.5
2.5
11.5
ns
5.0
1.0
6.5
8.5
1.0
9.0
ns
5.0
0.5
1.0
1.0
ns
Note 8: 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
Symbol
Parameter
tS
Setup Time, HIGH or LOW
Dn to CP
tH
Hold Time, HIGH or LOW
Dn to CP
tH
CP Pulse Width
HIGH or LOW
Note 9: Voltage Range 5.0 is 5.0V ± 0.5V
VCC
(V)
(Note 9)
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
4.5
5.5
Units
ns
ns
ns
Capacitance
Symbol
CIN
CPD
Parameter
Input Capacitance
Power Dissipation Capacitance
Typ
Units
4.5
pF
55.0
pF
Conditions
VCC = OPEN
VCC = 5.0V
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