Philips Semiconductors
74HC244; 74HCT244
Octal buffer/line driver; 3-state
Pin description
…continued
Pin
15
16
17
18
19
20
Description
2 data input 1
1 bus output 1
2 data input 0
1 bus output 0
2 output enable input (active LOW)
supply voltage
Table 3:
Symbol
2A1
1Y1
2A0
1Y0
2OE
V
CC
7. Functional description
7.1 Function table
Table 4:
Control
nOE
L
H
[1]
H = HIGH voltage level;
L = LOW voltage level;
X = don’t care;
Z = high-impedance OFF-state.
Function table
Input
nAn
L
H
X
Output
nYn
L
H
Z
8. Limiting values
Table 5:
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
Parameter
supply voltage
input clamping current
output clamping current
output current
quiescent supply current
ground current
storage temperature
total power dissipation
DIP20 package
SO20 package
SSOP20 package
TSSOP20 package
DHVQFN20 package
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
V
O
=
−0.5
V to (V
CC
+ 0.5 V)
Min
−0.5
-
-
-
-
-
−65
-
-
-
-
-
Max
+7
±20
±20
±35
70
−70
+150
750
500
500
500
500
Unit
V
mA
mA
mA
mA
mA
°C
mW
mW
mW
mW
mW
74HC_HCT244_3
© Koninklijke Philips Electronics N.V. 2005. All rights reserved.
Product data sheet
Rev. 03 — 22 December 2005
5 of 22
PHILIPS [ NXP SEMICONDUCTORS ]
