NXP Semiconductors
74LVC244A; 74LVCH244A
Octal buffer/line driver; 3-state
6. Functional description
Table 3.
Control
nOE
L
L
H
[1]
Function table
Input
nAn
L
H
X
Output
nYn
L
H
Z
H = HIGH voltage level; L = LOW voltage level; X = don’t care; Z = high-impedance OFF-state.
7. Limiting values
Table 4.
Limiting values
In accordance with the Absolute Maximum Rating System (IEC 60134). Voltages are referenced to GND (ground = 0 V).
Symbol
V
CC
I
IK
V
I
I
OK
V
O
I
O
I
CC
I
GND
T
stg
P
tot
[1]
[2]
[3]
Parameter
supply voltage
input clamping current
input voltage
output clamping current
output voltage
output current
supply current
ground current
storage temperature
total power dissipation
Conditions
V
I
< 0 V
Min
−0.5
−50
−0.5
-
Max
+6.5
-
+6.5
±50
V
CC
+ 0.5
+6.5
±50
100
-
+150
500
Unit
V
mA
V
mA
V
V
mA
mA
mA
°C
mW
V
O
> V
CC
or V
O
< 0 V
output HIGH or LOW
output 3-state
V
O
= 0 V to V
CC
−0.5
−0.5
-
-
−100
−65
T
amb
=
−40 °C
to +125
°C
-
The minimum input voltage ratings may be exceeded if the input current ratings are observed.
The output voltage ratings may be exceeded if the output current ratings are observed.
For SO20 packages: above 70
°C
derate linearly with 8 mW/K.
For (T)SSOP20 packages: above 60
°C
derate linearly with 5.5 mW/K.
For DHVQFN20 and DHXQFN20U packages: above 60
°C
derate linearly with 4.5 mW/K.
74LVC_LVCH244A_6
© NXP B.V. 2009. All rights reserved.
Product data sheet
Rev. 06 — 13 August 2009
5 of 18
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