74ACT244 Datasheet, PDF (2/9 Pages) STMicroelectronics – OCTAL BUS BUFFER WITH 3 STATE OUTPUTS NON INVERTED

74ACT244
INPUT AND OUTPUT EQUIVALENT CIRCUIT
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
V_CC
Positive Supply Voltage
TRUTH TABLE
G
L
L
H
X:”H” or ”L”
Z: High impedance
INPUT
An
L
H
X
OUTPUT
Yn
L
H
Z
ABSOLUTE MAXIMUM RATINGS
Symbol
Parameter
Value
Unit
V_CC Supply Voltage
-0.5 to +7
V
V_I
DC Input Voltage
-0.5 to V_CC + 0.5
V
V_O
DC Output Voltage
-0.5 to V_CC + 0.5
V
I_IK
DC Input Diode Current
± 20
mA
I_OK DC Output Diode Current
± 20
mA
IO
DC Output Current
± 50
mA
I_CC orI_GND DC V_CC or Ground Current
± 400
mA
T_stg Storage Temperature
-65 to +150
o_C
T_L
Lead Temperature (10 sec)
300
o_C
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
Pa ram et er
V_CC Supply Voltage
V_I
Input Voltage
V_O
Output Voltage
T_op Operating Temperature:
dt/dv Input Rise and Fall Time V_CC = 4.5 to 5.5V (note 1)
1) VIN from 0.8 V to 2.0 V
Value
4.5 to 5.5
0 to V_CC
0 to V_CC
-40 to +85
8
Unit
V
V
V
o_C
ns/V
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