74F257ASCX 查看數據表（PDF） - Fairchild Semiconductor
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74F257ASCX Datasheet PDF : 7 Pages
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Absolute Maximum Ratings(Note 1)
Storage Temperature
−65°C to +150°C
Ambient Temperature under Bias
−55°C to +125°C
Junction Temperature under Bias
−55°C to +150°C
VCC Pin Potential to Ground Pin
Input Voltage (Note 2)
−0.5V to +7.0V
−0.5V to +7.0V
Input Current (Note 2)
−30 mA to +5.0 mA
Voltage Applied to Output
in HIGH State (with VCC = 0V)
Standard Output
3-STATE Output
−0.5V to VCC
−0.5V to +5.5V
Current Applied to Output
in LOW State (Max)
twice the rated IOL (mA)
ESD Last Passing Voltage (Min)
4000V
Recommended Operating
Conditions
Free Air Ambient Temperature
Supply Voltage
0°C to +70°C
+4.5V to +5.5V
Note 1: Absolute maximum ratings are values beyond which the device
may be damaged or have its useful life impaired. Functional operation
under these conditions is not implied.
Note 2: Either voltage limit or current limit is sufficient to protect inputs.
DC Electrical Characteristics
Symbol
VIH
VIL
VCD
VOH
VOL
IIH
IBVI
ICEX
VID
IOD
IIL
IOZH
IOZL
IOS
IZZ
ICCH
ICCL
ICCZ
Parameter
Input HIGH Voltage
Input LOW Voltage
Input Clamp Diode Voltage
Output HIGH
Voltage
Output LOW Voltage
Input HIGH
10% VCC
10% VCC
5% VCC
5% VCC
10% VCC
Current
Input HIGH Current
Breakdown Test
Output HIGH
Leakage Current
Input Leakage
Test
Output Leakage
Circuit Current
Input LOW Current
Output Leakage Current
Output Leakage Current
Output Short-Circuit Current
Bus Drainage Test
Power Supply Current
Power Supply Current
Power Supply Current
Min
2.0
2.5
2.4
2.7
2.7
4.75
−60
Typ
9.0
14.5
15
Max
0.8
−1.2
0.5
5.0
7.0
50
3.75
−0.6
50
−50
−150
500
15
22
23
Units
V
V
V
V
V
µA
µA
µA
V
µA
mA
µA
µA
mA
µA
mA
mA
mA
VCC
Conditions
Recognized as a HIGH Signal
Recognized as a LOW Signal
Min IIN = −18 mA
IOH = −1 mA
Min
IOH = −3 mA
IOH = −1 mA
IOH = −3 mA
Min IOL = 24 mA
Max VIN = 2.7V
Max VIN = 7.0V
Max
0.0
0.0
Max
Max
Max
Max
0.0V
Max
Max
Max
VOUT = VCC
IID = 1.9 µA
All Other Pins Grounded
VIOD = 150 mV
All Other Pins Grounded
VIN = 0.5V
VOUT = 2.7V
VOUT = 0.5V
VOUT = 0V
VOUT = 5.25V
VO = HIGH
VO = LOW
VO = HIGH Z
3
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