MC74HC244A(2012) Ver la hoja de datos (PDF) - ON Semiconductor
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MC74HC244A Datasheet PDF : 9 Pages
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MC74HC244A
MAXIMUM RATINGS
Symbol
Parameter
Value
Unit
VCC DC Supply Voltage (Referenced to GND)
Vin DC Input Voltage (Referenced to GND)
Vout DC Output Voltage (Referenced to GND)
Iin
DC Input Current, per Pin
Iout DC Output Current, per Pin
ICC DC Supply Current, VCC and GND Pins
IIK
Input Clamp Current (VI < 0 or VI > VCC)
IOK Output Clamp Current (VO < 0 or VO > VCC)
PD Power Dissipation in Still Air, Plastic DIP†
SOIC Package†
TSSOP Package†
– 0.5 to + 7.0
V
– 0.5 to VCC + 0.5 V
– 0.5 to VCC + 0.5 V
± 20
mA
± 35
mA
± 75
mA
± 20
mA
± 20
mA
750
mW
500
450
Tstg Storage Temperature
– 65 to + 150
_C
TL
Lead Temperature, 1 mm from Case for 10 Seconds
_C
(Plastic DIP, SOIC, SSOP or TSSOP
260
Package)
Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress
ratings only. Functional operation above the Recommended Operating Conditions is not implied.
Extended exposure to stresses above the Recommended Operating Conditions may affect device
reliability.
†Derating — Plastic DIP: – 10 mW/_C from 65_ to 125_C
SOIC Package: – 7 mW/_C from 65_ to 125_C
TSSOP Package: − 6.1 mW/_C from 65_ to 125_C
This device contains protection
circuitry to guard against damage
due to high static voltages or electric
fields. However, precautions must
be taken to avoid applications of any
voltage higher than maximum rated
voltages to this high−impedance cir-
cuit. For proper operation, Vin and
Vout should be constrained to the
range GND v (Vin or Vout) v VCC.
Unused inputs must always be
tied to an appropriate logic voltage
level (e.g., either GND or VCC).
Unused outputs must be left open.
RECOMMENDED OPERATING CONDITIONS
Symbol
Parameter
Min Max Unit
VCC DC Supply Voltage (Referenced to GND)
2.0
6.0
V
Vin, Vout DC Input Voltage, Output Voltage (Referenced to GND) 0
VCC
V
TA
Operating Temperature, All Package Types
– 55 + 125 _C
tr, tf Input Rise and Fall Time
VCC = 2.0 V
(Figure 1)
VCC = 4.5 V
VCC = 6.0 V
0
1000 ns
0
500
0
400
DC ELECTRICAL CHARACTERISTICS (Voltages Referenced to GND)
Symbol
VIH
Parameter
Minimum High−Level Input Voltage
Test Conditions
Vout = VCC – 0.1 V
|Iout| v 20 mA
VIL Maximum Low−Level Input Voltage Vout = 0.1 V
|Iout| v 20 mA
VOH Minimum High−Level Output
Voltage
Vin = VIH
|Iout| v 20 mA
Vin = VIH |Iout| v 2.4 mA
|Iout| v 6.0 mA
|Iout| v 7.8 mA
Guaranteed Limit
VCC – 55 to
V
25_C v 85_C v 125_C Unit
2.0
1.5
1.5
1.5
V
3.0
2.1
2.1
2.1
4.5
3.15
3.15
3.15
6.0
4.2
4.2
4.2
2.0
0.5
0.5
0.5
V
3.0
0.9
0.9
0.9
4.5
1.35
1.35
1.35
6.0
1.8
1.8
1.8
2.0
1.9
1.9
1.9
V
4.5
4.4
4.4
4.4
6.0
5.9
5.9
5.9
3.0
2.48
2.34
2.2
4.5
3.98
3.84
3.7
6.0
5.48
5.34
5.2
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