74ACT257B Просмотр технического описания (PDF) - STMicroelectronics
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74ACT257B Datasheet PDF : 11 Pages
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74ACT257
DC SPECIFICATIONS
Test Condition
Value
Symbol
Parameter
VCC
(V)
TA = 25°C
Min. Typ. Max.
VIH High Level Input
4.5
VO = 0.1 V or
Voltage
5.5
VCC-0.1V
VIL Low Level Input
Voltage
4.5
VO = 0.1 V or
5.5
VCC-0.1V
VOH High Level Output 4.5
Voltage
5.5
IO=-50 µA
IO=-50 µA
4.5
IO=-24 mA
5.5
IO=-24 mA
VOL Low Level Output 4.5
Voltage
5.5
IO=50 µA
IO=50 µA
4.5
IO=24 mA
5.5
IO=24 mA
II
Input Leakage Cur-
rent
5.5
VI = VCC or GND
IOZ High Impedance
Output Leakege
Current
5.5
VI = VIH or VIL
VO = VCC or GND
ICCT Max ICC/Input
5.5 VI = VCC - 2.1V
ICC
Quiescent Supply
Current
5.5 VI = VCC or GND
IOLD
IOHD
Dynamic Output
Current (note 1, 2)
5.5 VOLD = 1.65 V max
VOHD = 3.85 V min
1) Maximum test duration 2ms, one output loaded at time
2.0
2.0
4.4
5.4
3.86
4.86
1.5
1.5
1.5
1.5
4.49
5.49
0.001
0.001
0.6
0.8
0.8
0.1
0.1
0.36
0.36
± 0.1
± 0.5
4
2) Incident wave switching is guaranteed on trasmission lines with impedances as low as 50Ω
-40 to 85°C -55 to 125°C
Min. Max. Min. Max.
2.0
2.0
2.0
2.0
0.8
0.8
0.8
0.8
4.4
4.4
5.4
5.4
3.76
3.7
4.76
4.7
0.1
0.1
0.1
0.1
0.44
0.5
0.44
0.5
±1
±1
±5
±5
1.5
1.6
40
80
75
50
-75
-50
Unit
V
V
V
µA
mA
mA
µA
mA
mA
AC ELECTRICAL CHARACTERISTICS (CL = 50 pF, RL = 500 Ω, Input tr = tf = 3ns)
Test Condition
Value
Symbol
Parameter
VCC
(V)
tPLH tPHL Propagation Delay
Time A, B to Y
tPLH tPHL Propagation Delay
Time SELECT to Y
tPZL tPZH Output Enable
Time
tPLZ tPHZ Output Disable
Time
5.0(*)
5.0(*)
5.0(*)
5.0(*)
TA = 25°C
-40 to 85°C -55 to 125°C Unit
Min. Typ. Max. Min. Max. Min. Max.
5.0 8.0
9.0
9.0 ns
6.0 9.0
10.0
10.0 ns
5.0 8.0
9.0
9.0 ns
6.0 9.0
10.0
10.0 ns
(*) Voltage range is 5.0V ± 0.5V
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