74HC244; 74HCT244
Philips Semiconductors
Octal buffer/line driver; 3-state
Table 3:
Symbol
2A1
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
1Y1
2A0
1Y0
2OE
2 output enable input (active LOW)
supply voltage
VCC
7. Functional description
7.1 Function table
Table 4:
Control
nOE
Function table[1]
Input
nAn
L
Output
nYn
L
L
H
H
H
X
Z
[1] H = HIGH voltage level;
L = LOW voltage level;
X = don’t care;
Z = high-impedance OFF-state.
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 Parameter
Conditions
Min
Max Unit
VCC
IIK
supply voltage
−0.5 +7
V
input clamping current
output clamping current
VI < −0.5 V or VI > VCC + 0.5 V
-
-
±20
mA
mA
IOK
VO < −0.5 V or
±20
VO > VCC + 0.5 V
IO
output current
VO = −0.5 V to (VCC + 0.5 V)
-
±35
70
mA
mA
mA
ICC
IGND
Tstg
Ptot
quiescent supply current
ground current
-
-
−70
storage temperature
total power dissipation
DIP20 package
−65
+150 °C
[1]
[2]
[3]
[3]
[4]
-
-
-
-
-
750
500
500
500
500
mW
SO20 package
mW
mW
mW
mW
SSOP20 package
TSSOP20 package
DHVQFN20 package
74HC_HCT244_3
© Koninklijke Philips Electronics N.V. 2005. All rights reserved.
Product data sheet
Rev. 03 — 22 December 2005
5 of 22
NXP [ NXP ]
