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부품번호 | MC74AC244 기능 |
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기능 | OCTAL BUFFER/LINE DRIVER WITH 3-STATE OUTPUTS | ||
제조업체 | Motorola Semiconductors | ||
로고 | |||
전체 6 페이지수
( DataSheet : www.DataSheet4U.com )
MC74AC244
MC74ACT244
Octal Buffer/Line Driver
with 3ĆState Outputs
The MC74AC244/74ACT244 is an octal buffer and line driver designed to be
employed as a memory address driver, clock driver and bus oriented transmitter/
receiver which provides improved PC board density.
• 3-State Outputs Drive Bus Lines or Buffer Memory Address Registers
• Outputs Source/Sink 24 mA
• ′ACT244 Has TTL Compatible Inputs
VCC OE2
20 19 18 17 16 15 14 13 12 11
OCTAL BUFFER/LINE
DRIVER WITH
3-STATE OUTPUTS
N SUFFIX
CASE 738-03
PLASTIC
1 2 3 4 5 6 7 8 9 10
OE1 GND
DW SUFFIX
CASE 751D-04
PLASTIC
TRUTH TABLE
Inputs
Outputs
OE1
L
L
H
D
L
H
X
(Pins 12, 14, 16, 18)
L
H
Z
H = HIGH Voltage Level
L = LOW Voltage Level
X = Immaterial
Z = High Impedance
TRUTH TABLE
Inputs
Outputs
OE2
L
L
H
D
L
H
X
(Pins 3, 5, 7, 9)
L
H
Z
H = HIGH Voltage Level
L = LOW Voltage Level
X = Immaterial
Z = High Impedance
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FACT DATA
5-1
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MC74AC244 MC74ACT244
AC CHARACTERISTICS (For Figures and Waveforms — See Section 3)
74AC
Symbol
Parameter
VCC*
(V)
TA = +25°C
CL = 50 pF
Min Typ Max
74AC
TA = –40°C
to +85°C
CL = 50 pF
Min Max
Unit
Fig.
No.
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
5.0 1.5 5.0 7.0 1.0 7.5
3.3 2.0 6.5 9.0 2.0 10.0
5.0 1.5 5.0 7.0 1.0 7.5
3.3 2.0 6.0 10.5 1.5 11.0
5.0 1.5 5.0 7.0 1.5 8.0
3.3 2.5 7.5 10.0 2.0 11.0
5.0 1.5 5.5 8.0 1.5 8.5
3.3 3.0 7.0 10.0 1.5 10.5
5.0 2.5 6.5 9.0 1.0 9.5
3.3 2.5 7.5 10.5 2.5 11.5
5.0 2.0 6.5 9.0 2.0 9.5
ns
ns
ns
ns
ns
ns
3-5
3-5
3-7
3-8
3-7
3-8
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
5.5 1.5 2.0
4.5 1.5 0.8
5.5 1.5 0.8
4.5 4.49 4.4
5.5 5.49 5.4
2.0
2.0
0.8
0.8
4.4
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
5.5 4.86
4.5 0.001 0.1
5.5 0.001 0.1
3.76
4.76
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
5.5 ±0.5
5.5
5.5
5.5 8.0
1.5
±5.0
75
–75
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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부품번호 | 상세설명 및 기능 | 제조사 |
MC74AC240 | OCTAL BUFFER/LINE DRIVER WITH 3-STATE OUTPUTS | Motorola Semiconductors |
MC74AC240 | Octal Buffer/Line Driver | ON Semiconductor |
DataSheet.kr | 2020 | 연락처 | 링크모음 | 검색 | 사이트맵 |