NXP Semiconductors
74HC244-Q100; 74HCT244-Q100
Octal buffer/line driver; 3-state
5.2 Pin description
Table 2.
Symbol
1OE, 2OE
1A0, 1A1, 1A2, 1A3
2Y0, 2Y1, 2Y2, 2Y3
GND
2A0, 2A1, 2A2, 2A3
1Y0, 1Y1, 1Y2, 1Y3
V
CC
Pin description
Pin
1, 19
2, 4, 6, 8
3, 5, 7, 9
10
17, 15, 13, 11
18, 16, 14, 12
20
Description
output enable input (active LOW)
data input
bus output
ground (0 V)
data input
bus output
supply voltage
6. Functional description
Table 3.
Input
nOE
L
L
H
[1]
Function table
Output
nAn
L
H
X
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
I
OK
I
O
I
CC
I
GND
T
stg
P
tot
[1]
Parameter
supply voltage
input clamping current
output clamping current
output current
supply current
ground current
storage temperature
total power dissipation
Conditions
V
I
<
0.5
V or V
I
> V
CC
+ 0.5 V
V
O
<
0.5
V or V
O
> V
CC
+ 0.5 V
0.5
V < V
O
< V
CC
+ 0.5 V
Min
0.5
-
-
-
-
70
65
Max
+7
20
20
35
70
-
+150
500
Unit
V
mA
mA
mA
mA
mA
C
mW
-
For SO20 packages: above 70
C,
P
tot
derates linearly with 8 mW/K.
For TSSOP20 package: above 60
C,
P
tot
derates linearly with 5.5 mW/K.
For DHVQFN20 packages: above 60
C,
P
tot
derates linearly with 4.5 mW/K.
74HC_HCT244_Q100
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© NXP B.V. 2012. All rights reserved.
Product data sheet
Rev. 1. — 7 August 2012
4 of 17
PHILIPS [ NXP SEMICONDUCTORS ]
