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SN74LVC244A
OCTAL BUFFER/DRIVER
WITH 3-STATE OUTPUTS
SCAS414X – NOVEMBER 1992 – REVISED MARCH 2005
LOGIC DIAGRAM (POSITIVE LOGIC)
1OE
1
2OE
19
1A1
2
18
1Y1
2A1
11
9
2Y1
1A2
4
16
1Y2
2A2
13
7
2Y2
1A3
6
14
1Y3
2A3
15
5
2Y3
1A4
8
12
1Y4
2A4
17
3
2Y4
Pin numbers shown are for the DB, DGV, DW, N, NS, PW, and RGY packages.
Absolute Maximum Ratings
(1)
over operating free-air temperature range (unless otherwise noted)
MIN
V
CC
V
I
V
O
V
O
I
IK
I
OK
I
O
Supply voltage range
Input voltage range
(2)
Voltage range applied to any output in the high-impedance or power-off
Voltage range applied to any output in the high or low state
(2) (3)
Input clamp current
Output clamp current
Continuous output current
Continuous current through V
CC
or GND
DB package
(4)
DGV
package
(4)
DW package
(4)
θ
JA
Package thermal impedance
GQN/ZQN package
(4)
N package
(4)
NS package
(4)
PW
T
stg
P
tot
(1)
(2)
(3)
(4)
(5)
(6)
(7)
Storage temperature range
Power dissipation
T
A
= –40°C to 125°C
(6) (7)
package
(4)
–65
RGY package
(5)
V
I
< 0
V
O
< 0
state
(2)
–0.5
–0.5
–0.5
–0.5
MAX
6.5
6.5
6.5
V
CC
+ 0.5
–50
–50
±50
±100
70
92
58
78
69
60
83
37
150
500
°C
mW
°C/W
UNIT
V
V
V
V
mA
mA
mA
mA
Stresses beyond those listed under "absolute maximum ratings" may cause permanent damage to the device. These are stress ratings
only, and functional operation of the device at these or any other conditions beyond those indicated under "recommended operating
conditions" is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
The input and output negative-voltage ratings may be exceeded if the input and output current ratings are observed.
The value of V
CC
is provided in the recommended operating conditions table.
The package thermal impedance is calculated in accordance with JESD 51-7.
The package thermal impedance is calculated in accordance with JESD 51-5.
For the DW package: above 70°C the value of P
tot
derates linearly with 8 mW/K.
For the DB, DGV, N, NS, and PW packages: above 60°C the value of P
tot
derates linearly with 5.5 mW/K.
3
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