UNISONIC TECHNOLOGIES CO., LTD
U74LVC244
OCTAL BUFFER/DRIVER WITH
3-STATE OUTPUTS
DESCRIPTION
CMOS IC
The UTC
U74LVC244
contains two 4-bit line drivers with
separate output-enable (
OE
) inputs. When
OE
is low, the
device passes data from the A to the Y. When
OE
is high, the
outputs are in the high-impedance state.
The UTC
U74LVC244
can be used in a mixed 3.3V/5V system
environment.
FEATURES
* Operate From 1.65V to 3.6V
* Input Accept Voltages to 5.5V
* Partial-Power-Down Mode Operation
* Max tpd is 5.9ns at 3.3V
ORDERING INFORMATION
Ordering Number
Lead Free
U74LVC244L-D20-T
U74LVC244L-S20-R
U74LVC244L-P20-R
Halogen Free
U74LVC244G-D20-T
U74LVC244G-S20-R
U74LVC244G-P20-R
Package
DIP-20
SOP-20
TSSOP-20
Packing
Tube
Tape Reel
Tape Reel
MARKING
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Copyright © 2016 Unisonic Technologies Co., Ltd
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QW-R502-245.E
U74LVC244
PIN CONFIGURATION
1OE
1A1
2Y4
1A2
2Y3
1A3
2Y2
1A4
2Y1
GND
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
V
CC
2OE
1Y1
2A4
1Y2
2A3
1Y3
2A2
1Y4
2A1
CMOS IC
FUNCTION TABLE
(each gate)
INPUT(
OE
)
H
L
L
INPUT(A)
X
H
L
OUTPUT(Y)
Z
H
L
LOGIC DIAGRAM
(Positive Logic)
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QW-R502-245.E
U74LVC244
ABSOLUTE MAXIMUM RATINGS
SYMBOL
V
CC
V
IN
V
OUT
CONDITIONS
RATINGS
-0.5 ~ 6.5
-0.5 ~ 6.5
-0.5 ~ 6.5
PARAMETER
Supply Voltage
Input Voltage
Output Voltage
CMOS IC
UNIT
V
V
V
-0.5 ~ V
CC
+0.5
V
Input Clamp Current
I
IK
-50
mA
Output Clamp Current
I
OK
-50
mA
Output Current
I
OUT
±50
mA
V
CC
or GND Current
I
CC
±100
mA
Operating Temperature
T
OPR
-40 ~ +125
°C
Storage Temperature
T
STG
-65 ~ +150
°C
Notes: 1. Absolute maximum ratings are those values beyond which the device could be permanently damaged.
Absolute maximum ratings are stress ratings only and functional device operation is not implied.
2. The input and output voltage ratings may be exceeded if the input and output current ratings are observed.
Output in high-impedance or
power-off state
Output in high or low state
THERMAL DATA
PARAMETER
SYMBOL
DIP-20
SOP-20
TSSOP-20
θ
JA
RATINGS
69
58
83
UNIT
°C/W
°C/W
°C/W
Junction to Ambient
RECOMMENDED OPERATING CONDITIONS
PARAMETER
SYMBOL
V
CC
V
IN
V
OUT
V
IH
V
CC
=1.65V to 1.95V
V
CC
=2.3V to 2.7V
V
CC
=2.7V to 3.6V
V
CC
=1.65V to 1.95V
V
CC
=2.3V to 2.7V
V
CC
=2.7V to 3.6V
V
CC
=1.65V
V
CC
=2.3V
V
CC
=2.7V
V
CC
=3V
V
CC
=1.65V
V
CC
=2.3V
V
CC
=2.7V
V
CC
=3V
V
CC
=1.65V to 2.7V
V
CC
=2.7V to 3.6V
CONDITIONS
Operating
Data retention only
MIN
1.65
1.5
0
0
0.65×V
CC
1.7
2
TYP
MAX
3.6
5.5
V
CC
UNIT
V
V
V
V
V
V
V
V
V
V
mA
mA
mA
mA
mA
mA
mA
mA
ns/V
ns/V
Supply Voltage
Input Voltage
Output Voltage
High-Level Input Voltage
Low-Level Input Voltage
V
IL
High-Level Output Current
I
OH
Low-Level Output Current
I
OL
Input Rise and Fall Times
t
r
/ t
f
0
0
0.35×V
CC
0.7
0.8
-4
-8
-12
-24
4
8
12
24
20
10
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QW-R502-245.E
U74LVC244
ELECTRICAL CHARACTERISTICS
PARAMETER
SYMBOL
TEST CONDITIONS
V
CC
=1.65V to 3.6V, I
OH
=-100uA
V
CC
=1.65V, I
OH
=-4mA
V
CC
=2.3V, I
OH
=-8mA
V
CC
=2.7V, I
OH
=-12mA
V
CC
=3V, I
OH
=-12mA
V
CC
=3V, I
OH
=-24mA
V
CC
=1.65V to 3.6V, I
OL
=100uA
V
CC
= 1.65V, I
OL
=4mA
V
CC
=2.3V, I
OL
=8mA
V
CC
=2.7V, I
OL
=12mA
V
CC
=3V, I
OL
=24mA
V
CC
=3.6V, V
IN
=5.5 V or GND
V
CC
=0V, V
IN
or V
OUT
=5.5V
V
CC
=3.6V, V
OUT
=0 or 5.5V
V
CC
=3.6V ,V
IN
=V
CC
or GND, I
OUT
=0
V
CC
=3.6V ,3.6V≦V
IN
≦5.5V,
I
OUT
=0
V
CC
=2.7V to 3.6V, One input at
V
CC
-0.6V,Other inputs at V
CC
or GND
V
CC
=3.3V, V
IN
=V
CC
or GND
V
CC
=3.3V, V
OUT
=V
CC
or GND
MIN
TYP
V
CC
-0.2
1.29
1.9
2.2
2.4
2.3
CMOS IC
MAX
High-Level Output Voltage
V
OH
Low-Level Output Voltage
V
OL
Input Leakage Current
Power OFF Leakage Current
Output OFF-State Current
Quiescent Supply Current
Additional Quiescent Supply
Current
Input Capacitance
Output Capacitance
I
I(LEAK)
I
OFF
I
OZ
I
Q
I
Q
C
I
C
O
0.1
0.24
0.3
0.4
0.55
±1
±1
±1
1
1
500
4
5.5
UNIT
V
V
V
V
V
V
V
V
V
V
V
μA
μA
μA
μA
μA
μA
pF
pF
SWITCHING CHARACTERISTICS
PARAMETER
SYMBOL
TEST CONDITIONS
V
CC
=1.5V
V
CC
=1.8V±0.15V
V
CC
=2.5V±0.2V
V
CC
=2.7V
V
CC
=3.3V±0.3V
V
CC
=1.5V
V
CC
=1.8V±0.15V
V
CC
=2.5V±0.2V
V
CC
=2.7V
V
CC
=3.3V±0.3V
V
CC
=1.5V
V
CC
=1.8V±0.15 V
V
CC
=2.5V±0.2V
V
CC
=2.7V
V
CC
=3.3V±0.3V
MIN
1
1
1
1
1.5
1
1
1
1
1.5
1
1
1
1
1.5
TYP
7
5.9
4.2
4.2
3.9
8.3
6.4
4.6
5
4.5
7.2
5.8
3.7
3.8
3.8
MAX
14.4
10.4
7.4
6.7
5.7
17.8
12.1
9.1
8.4
7.4
15.6
11.6
7.3
6.6
6.3
UNIT
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
From Input(A) to Output(Y)
t
pd
From Input( OE ) to Output(Y)
t
en
From Input( OE ) to Output(Y)
t
dis
OPERATING CHARACTERISTICS
PARAMETER
SYMBOL
TEST CONDITIONS
OE
=0, f=10MHz, V
CC
=1.8V
OE
=0, f=10MHz, V
CC
=2.5V
OE
=0, f=10MHz, V
CC
=3.3V
OE
=1, f=10MHz, V
CC
=1.8V
OE
=1, f=10MHz, V
CC
=2.5V
OE
=1, f=10MHz, V
CC
=3.3V
MIN
TYP
43
43
44
1
1
2
MAX
UNIT
pF
pF
pF
pF
pF
pF
Power Dissipation Capacitance
C
PD
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QW-R502-245.E
U74LVC244
TEST CIRCUIT AND WAVEFORMS
CMOS IC
V
CC
1.5V
1.8V±0.15V
2.5V±0.2V
2.7V
3.3V±0.3V
V
IN
V
CC
V
CC
V
CC
2.7V
2.7V
t
R
/t
F
≤2ns
≤2ns
≤2ns
≤2.5ns
≤2.5ns
V
M
V
CC
/2
V
CC
/2
V
CC
/2
1.5V
1.5V
V△
0.1V
0.15V
0.15V
0.3V
0.3V
C
L
15pF
30pF
30pF
50pF
50pF
R
L
2KΩ
1KΩ
500Ω
500Ω
500Ω
t
PLH
/t
PHL
OPEN
OPEN
OPEN
OPEN
OPEN
V
EXT
t
PZH
/t
PHZ
GND
GND
GND
GND
GND
t
PZL
/t
PLZ
2*V
CC
2*V
CC
2*V
CC
6V
6V
Fig-1 Load circuitry
Fig-2 Propagation delay waves
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QW-R502-245.E
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