74AC244(1997) データシートの表示（PDF） - STMicroelectronics
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74AC244 Datasheet PDF : 8 Pages
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74AC244
INPUT AND OUTPUT EQUIVALENT CIRCUIT
PIN DESCRIPTION
PIN No
1
2, 4, 6, 8
9, 7, 5, 3
11, 13, 15, 17
18, 16, 14, 12
19
10
20
SYMBOL
1G
1A1 to 1A4
2Y1 to 2Y4
2A1 to 2A4
1Y1 to 1Y4
2G
GND
VCC
NAME AND FUNCTION
Output Enable Input
Data Inputs
Data Outputs
Data Inputs
Data Outputs
Output Enabel Input
Ground (0V)
Positive Supply Voltage
TRUTH TABLE
G
L
L
H
X: ”H” or ”L”
Z: High impedance
I N PU T
An
L
H
X
OUT PUT
Yn
L
H
Z
ABSOLUTE MAXIMUM RATINGS
Sy mb o l
Parameter
Value
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 or IGND 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
Sy mb o l
Parameter
VCC Supply Voltage
VI
Input Voltage
VO
Output Voltage
Top Operating Temperature:
dt/dv Input Rise and Fall Time VCC = 3.0, 4.5 or 5.5 V(note 1)
1) VIN from 30% to 70% of VCC
Value
2 to 6
0 to VCC
0 to VCC
-40 to +85
8
Un it
V
V
V
oC
ns/V
2/8
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