HD74LS244
Function Table
Note:
Inputs
G
A
H
X
L
H
L
L
H; high level, L; low level, X; irrelevant, Z; off (high-impedance) state of a 3-state output
Output
Y
Z
H
L
Block Diagram (1/2)
A1
Y1
A2
Y2
A3
Y3
A4
Y4
G
Absolute Maximum Ratings
Item
Symbol
Ratings
Unit
Supply voltage
VCC
7
V
Input voltage
VIN
7
V
Power dissipation
Storage temperature
PT
Tstg
400
mW
–65 to +150
°C
Note: Voltage value, unless otherwise noted, are with respect to network ground terminal.
Recommended Operating Conditions
Item
Supply voltage
Output current
Operating temperature
Symbol
VCC
IOH
IOL
Topr
Min
4.75
—
—
–20
Typ
5.00
—
—
25
Max
5.25
–15
24
75
Unit
V
mA
mA
°C
Rev.2.00, Feb.18.2005, page 2 of 5
