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74ACT244 Datasheet(PDF) 2 Page - STMicroelectronics

Part No. 74ACT244
Description  OCTAL BUS BUFFER WITH 3 STATE OUTPUTS NON INVERTED
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Maker  STMICROELECTRONICS [STMicroelectronics]
Homepage  http://www.st.com
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74ACT244 Datasheet(HTML) 2 Page - STMicroelectronics

   
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INPUT AND OUTPUT EQUIVALENT CIRCUIT
TRUTH TABLE
INPUT
OUTPUT
GAn
Yn
LLL
LH
H
HX
Z
X:”H” or ”L”
Z: High impedance
PIN DESCRIPTION
PIN No
SYMBOL
NAME AND FUNCT ION
1
1G
Output Enable Input
2, 4,6, 8
1A1 to 1A4
Data Inputs
9, 7,5, 3
2Y1 to 2Y4
Data Outputs
11, 13, 15, 17
2A1 to 2A4
Data Inputs
18, 16, 14, 12
1Y1 to 1Y4
Data Outputs
19
2G
Output Enabel Input
10
GND
Ground (0V)
20
VCC
Positive Supply Voltage
ABSOLUTE MAXIMUM RATINGS
Symbol
Parameter
Val ue
Unit
VCC
Supply Voltage
-0.5 to +7
V
VI
DC Input Voltage
-0.5 to VCC +0.5
V
VO
DC Output Voltage
-0.5 to VCC +0.5
V
IIK
DC Input Diode Current
± 20
mA
IOK
DC Output Diode Current
± 20
mA
IO
DC Output Current
± 50
mA
ICC orIGND
DC VCC or Ground Current
± 400
mA
Tstg
Storage Temperature
-65 to +150
oC
TL
Lead Temperature (10 sec)
300
oC
Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these condition is not implied.
RECOMMENDED OPERATING CONDITIONS
Symbol
Parameter
Value
Unit
VCC
Supply Voltage
4.5 to 5.5
V
VI
Input Voltage
0 to VCC
V
VO
Output Voltage
0 to VCC
V
Top
Operating Temperature:
-40 to +85
oC
dt/dv
Input Rise and Fall Time VCC = 4.5 to 5.5V (note 1)
8
ns/V
1) VIN from 0.8 V to 2.0 V
74ACT244
2/9


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