M74HC244
2/10
INPUT AND OUTPUT EQUIVALENT CIRCUIT PIN DESCRIPTION
TRUTH TABLE
X : Don’t Care
Z : High Impedance
ABSOLUTE MAXIMUM RATINGS
Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these conditions is
not implied
(*) 500mW at 65
°C
; derate to 300mW by 10mW/
°C
from 65
°C to 85°C
RECOMMENDED OPERATING CONDITIONS
PIN No SYMBOL NAME AND FUNCTION
11G
Output Enable Input
2, 4, 6, 8 1A1 to 1A4 Data Inputs
9, 7, 5, 3 2Y1 to 2Y4 Data Outputs
11, 13, 15,
17
2A1 to 2A4 Data Inputs
18, 16, 14,
12
1Y1 to 1Y4 Data Outputs
19 2G
Output Enable Input
10 GND Ground (0V)
20 V
CC
Positive Supply Voltage
INPUTS OUTPUT
G
An Yn
LLL
LHH
HXZ
Symbol Parameter Value Unit
V
CC
Supply Voltage
-0.5 to +7 V
V
I
DC Input Voltage -0.5 to V
CC
+ 0.5
V
V
O
DC Output Voltage -0.5 to V
CC
+ 0.5
V
I
IK
DC Input Diode Current
± 20 mA
I
OK
DC Output Diode Current
± 20 mA
I
O
DC Output Current
± 35 mA
I
CC
or I
GND
DC V
CC
or Ground Current
± 70 mA
P
D
Power Dissipation
500(*) mW
T
stg
Storage Temperature
-65 to +150 °C
T
L
Lead Temperature (10 sec)
300 °C
Symbol Parameter Value Unit
V
CC
Supply Voltage
2 to 6 V
V
I
Input Voltage 0 to V
CC
V
V
O
Output Voltage 0 to V
CC
V
T
op
Operating Temperature
-55 to 125 °C
t
r
, t
f
Input Rise and Fall Time V
CC
= 2.0V
0 to 1000 ns
V
CC
= 4.5V
0 to 500 ns
V
CC
= 6.0V
0 to 400 ns
Obsolete Product(s) - Obsolete Product(s)
