MM74HC245A 查看數據表（PDF） - Fairchild Semiconductor
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MM74HC245A Datasheet PDF : 8 Pages
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Absolute Maximum Ratings(Note 1)
(Note 2)
Supply Voltage (VCC)
DC Input Voltage DIR and G pins (VIN)
DC Input/Output Voltage (VIN, VOUT)
Clamp Diode Current (ICD)
DC Output Current, per pin (IOUT)
DC VCC or GND Current, per pin (ICC)
Storage Temperature Range (TSTG)
Power Dissipation (PD)
(Note 3)
S.O. Package only
Lead Temperature (TL)
(Soldering 10 seconds)
0.5 to 7.0V
1.5 to VCC 1.5V
0.5 to VCC 0.5V
r20 mA
r35 mA
r70 mA
65qC to 150qC
600 mW
500 mW
260qC
Recommended Operating
Conditions
Min Max Units
Supply Voltage (VCC)
DC Input or Output Voltage
2
6
V
(VIN, VOUT)
0
VCC
V
Operating Temperature Range (TA) 40 85
qC
Input Rise/Fall Times
(tr, tf) VCC 2.0V
1000 ns
VCC 4.5V
500
ns
VCC 6.0V
400
ns
Note 1: Maximum Ratings are those values beyond which damage to the
device may occur.
Note 2: Unless otherwise specified all voltages are referenced to ground.
Note 3: Power Dissipation temperature derating — plastic “N” package:
12 mW/qC from 65qC to 85qC.
DC Electrical Characteristics (Note 4)
Symbol
Parameter
Conditions
VCC
TA 25qC
TA 40 to 85qC TA 55 to 125qC
Units
Typ
Guaranteed Limits
VIH
Minimum HIGH Level Input
Voltage
2.0V
4.5V
1.5
1.5
3.15
3.15
1.5
V
3.15
V
6.0V
4.2
4.2
4.2
V
VIL
Maximum LOW Level Input
Voltage
2.0V
4.5V
0.5
0.5
1.35
1.35
0.5
V
1.35
V
6.0V
1.8
1.8
1.8
V
VOH
Minimum HIGH Level Output VIN VIH or VIL
Voltage
|IOUT| d 20 PA
2.0V
2.0
1.9
1.9
4.5V
4.5
4.4
4.4
1.9
V
4.4
V
6.0V
6.0
5.9
5.9
5.9
V
VIN VIH or VIL
|IOUT| d 6.0 mA
|IOUT| d 7.8 mA
VOL
Maximum LOW Level Output VIN VIH or VIL
Voltage
|IOUT| d 20 PA
4.5V
4.2
3.98
3.84
6.0V
5.7
5.48
5.34
2.0V
0
0.1
0.1
4.5V
0
0.1
0.1
3.7
V
5.2
V
0.1
V
0.1
V
6.0V
0
0.1
0.1
0.1
V
IIN
Input Leakage
Current (G and DIR)
VIN VIH or VIL
|IOUT| d 6.0 mA
|IOUT| d 7.8 mA
VIN VCC to GND
4.5V
0.2
0.26
0.33
6.0V
0.2
0.26
0.33
6.0V
r0.1
r1.0
0.4
V
0.4
V
r1.0
PA
IOZ
Maximum 3-STATE Output VOUT VCC or GND
6.0V
r0.5
r5.0
r10
PA
Leakage Current
Enable G VIH
ICC
Maximum Quiescent Supply VIN VCC or GND
6.0V
8.0
80
160
PA
Current
IOUT 0 PA
Note 4: For a power supply of 5V r10% the worst case output voltages (VOH, and VOL) occur for HC at 4.5V. Thus the 4.5V values should be used when
designing with this supply. Worst case VIH and VIL occur at VCC 5.5V and 4.5V respectively. (The VIH value at 5.5V is 3.85V.) The worst case leakage cur-
rent (IIN, ICC, and IOZ) occur for CMOS at the higher voltage and so the 6.0V values should be used.
3
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