74AC257SC Просмотр технического описания (PDF) - Fairchild Semiconductor
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74AC257SC Datasheet PDF : 9 Pages
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DC Electrical Characteristics for ACT
Symbol
Parameter
VIH
Minimum HIGH Level
Input Voltage
VIL
Maximum LOW Level
Input Voltage
VOH
Minimum HIGH Level
Output Voltage
VCC
TA = +25°C
TA = −40°C to +85°C
(V)
Typ
Guaranteed Limits
4.5
1.5
2.0
2.0
5.5
1.5
2.0
2.0
4.5
1.5
0.8
0.8
5.5
1.5
0.8
0.8
4.5
4.49
4.4
4.4
5.5
5.49
5.4
5.4
VOL
Maximum LOW Level
Output Voltage
4.5
3.86
5.5
4.86
4.5
0.001
0.1
5.5
0.001
0.1
3.76
4.76
0.1
0.1
4.5
0.36
5.5
0.36
IIN
Maximum Input
5.5
±0.1
Leakage Current
IOZ
Maximum 3-STATE
5.5
Leakage Current
± 0.5
ICCT
IOLD
IOHD
ICC
Maximum
ICC/Input
Dynamic Output Current
Minimum (Note 6)
Maximum Quiescent
Supply Current
5.5
0.6
5.5
5.5
5.5
4.0
Note 5: All outputs loaded; thresholds on input associated with output under test.
Note 6: Maximum test duration 2.0 ms, one output loaded at a time.
0.44
0.44
±1.0
± 5.0
1.5
75
−75
40.0
Units
Conditions
V
VOUT = 0.1V
or VCC − 0.1V
V
VOUT = 0.1V
or VCC − 0.1V
V
IOUT = −50 µA
VIN = VIL or VIH
V
IOH = −24 mA
IOH = −24 mA (Note 5)
V
IOUT = 50 µA
VIN = VIL or VIH
V
IOL = 24 mA
IOL = 24 mA (Note 5)
µA VI = VCC, GND
µA
VI = VIL, VIH
VO = VCC, GND
mA VI = VCC − 2.1V
mA VOLD = 1.65V Max
mA VOHD = 3.85V Min
µA
VIN = VCC
or GND
AC Electrical Characteristics for AC
Symbol
Parameter
Propagation Delay
tPLH
In to Zn
tPHL
Propagation Delay
In to Zn
tPLH
Propagation Delay
S to Zn
tPHL
Propagation Delay
S to Zn
Output Enable Time
tPZH
Output Enable Time
tPZL
Output Disable Time
tPHZ
Output Disable Time
tPLZ
Note 7: Voltage Range 3.3 is 3.0V ± 0.3V
Voltage Range 5.0 is 5.0V ± 0.5V
VCC
(V)
(Note 7)
3.3
5.0
3.3
5.0
3.3
5.0
3.3
5.0
3.3
5.0
3.3
5.0
3.3
5.0
3.3
5.0
TA = +25°C
TA = −40°C to +85°C
CL = 50 pF
CL = 50 pF
Min Typ
Max
Min Max
1.5
5.0
8.5
1.0
9.0
1.5
4.0
6.0
1.0
7.0
1.5
6.0
8.5
1.0
9.0
1.5
4.5
6.0
1.0
7.0
1.5
7.0
10.5
1.5
11.5
1.5
5.0
7.5
1.0
8.5
1.5
7.5
10.5
1.5
11.5
1.5
5.5
7.5
1.0
8.5
1.5
6.5
9.5
1.0
10.5
1.5
5.0
7.5
1.0
8.5
1.5
5.5
9.0
1.0
10.0
1.5
5.0
8.5
1.0
9.5
1.5
5.5
10.0
1.0
11.0
1.5
5.0
9.0
1.0
10.0
1.5
5.5
9.0
1.0
10.0
1.5
5.0
8.0
1.0
9.0
Units
ns
ns
ns
ns
ns
ns
ns
ns
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