MC74ACT244 查看數據表（PDF） - Motorola => Freescale
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MC74ACT244 Datasheet PDF : 6 Pages
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MC74AC244 MC74ACT244
AC CHARACTERISTICS (For Figures and Waveforms — See Section 3)
74AC
74AC
Symbol
Parameter
VCC*
(V)
TA = +25°C
CL = 50 pF
TA = –40°C
to +85°C
CL = 50 pF
Unit
Fig.
No.
Min Typ Max Min Max
tPLH
tPHL
tPZH
Propagation Delay
Data to Output
Propagation Delay
Data to Output
Output Enable Time
tPZL
Output Enable Time
tPHZ
Output Disable Time
tPLZ
Output Disable Time
* Voltage Range 3.3 V is 3.3 V ±0.3 V.
Voltage Range 5.0 V is 5.0 V ±0.5 V.
DC CHARACTERISTICS
3.3 2.0 6.5 9.0 1.5 10.0
ns
3-5
5.0 1.5 5.0 7.0 1.0 7.5
3.3 2.0 6.5 9.0 2.0 10.0
ns
3-5
5.0 1.5 5.0 7.0 1.0 7.5
3.3 2.0 6.0 10.5 1.5 11.0
ns
3-7
5.0 1.5 5.0 7.0 1.5 8.0
3.3 2.5 7.5 10.0 2.0 11.0
ns
3-8
5.0 1.5 5.5 8.0 1.5 8.5
3.3 3.0 7.0 10.0 1.5 10.5
ns
3-7
5.0 2.5 6.5 9.0 1.0 9.5
3.3 2.5 7.5 10.5 2.5 11.5
ns
3-8
5.0 2.0 6.5 9.0 2.0 9.5
74ACT
74ACT
Symbol
Parameter
VCC
(V)
TA = +25°C
TA =
–40°C to +85°C
Unit
Conditions
Typ Guaranteed Limits
VIH
VIL
VOH
Minimum High Level
Input Voltage
Maximum Low Level
Input Voltage
Minimum High Level
Output Voltage
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
V
VOUT = 0.1 V
or VCC – 0.1 V
V
VOUT = 0.1 V
or VCC – 0.1 V
V
IOUT = –50 µA
VOL
Maximum Low Level
Output Voltage
4.5
3.86
3.76
5.5
4.86
4.76
4.5 0.001 0.1
0.1
5.5 0.001 0.1
0.1
*VIN = VIL or VIH
V
IOH
–24 mA
–24 mA
V
IOUT = 50 µA
IIN
Maximum Input
Leakage Current
*VIN = VIL or VIH
4.5
5.5
0.36
0.44
0.36
0.44
V
IOL
24 mA
24 mA
5.5
±0.1
±1.0
µA
VI = VCC, GND
∆ICCT
IOZ
IOLD
IOHD
ICC
Additional Max. ICC/Input
Maximum
3-State
Current
†Minimum Dynamic
Output Current
Maximum Quiescent
Supply Current
5.5
0.6
1.5
5.5
±0.5
±5.0
5.5
75
5.5
–75
5.5
8.0
80
mA
VI = VCC – 2.1 V
VI (OE) = VIL, VIH
µA
VI = VCC, GND
VO = VCC, GND
mA
VOLD = 1.65 V Max
mA
VOHD = 3.85 V Min
µA
VIN = VCC or GND
* All outputs loaded; thresholds on input associated with output under test.
† Maximum test duration 2.0 ms, one output loaded at a time.
FACT DATA
5-4
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