UTC-IC U74LVC244

UNISONIC TECHNOLOGIES CO., LTD
U74LVC244
CMOS IC
OCTAL BUFFER/DRIVER WITH
3-STATE OUTPUTS
„
DESCRIPTION
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
Halogen Free
U74LVC244L-S20-R
U74LVC244G-S20-R
U74LVC244L-P20-R
U74LVC244G-P20-R
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Copyright © 2011 Unisonic Technologies Co., Ltd
Package
Packing
SOP-20
TSSOP-20
Tape Reel
Tape Reel
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U74LVC244
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„
PIN CONFIGURATION
1OE
1
20
VCC
1A1
2
19
2OE
2Y4
3
18
1Y1
1A2
4
17
2A4
2Y3
5
16
1Y2
1A3
6
15
2A3
2Y2
7
14
1Y3
1A4
8
13
2A2
2Y1
9
12
1Y4
GND
10
11
2A1
FUNCTION TABLE (each gate)
INPUT(OE )
H
L
L
„
CMOS IC
INPUT(A)
X
H
L
OUTPUT(Y)
Z
H
L
LOGIC DIAGRAM (Positive Logic)
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CMOS IC
ABSOLUTE MAXIMUM RATINGS
PARAMETER
SYMBOL
RATINGS
UNIT
Supply Voltage
VCC
-0.5~6.5
V
Input Voltage
VIN
-0.5~ 6.5
V
Voltage applied to output in high-impedance or power-off state
-0.5~6.5
VOUT
V
-0.5~VCC+0.5
Voltage applied to output in high or low state
Input Clamp Current
IIK
-50
mA
Output Clamp Current
IOK
-50
mA
Output Current
IOUT
±50
mA
VCC or GND Current
ICC
±100
mA
SOP-20
500
Power dissipation
mW
TSSOP-20
450
PD
SOP-20
7
mW/K
Derate above Ta>60°C
6.1
TSSOP-20
Operating Temperature
TOPR
-40~ +125
°C
Storage Temperature
-65 ~ +150
°C
TSTG
Note: 1. The input and output voltage ratings may be exceeded if the input and output current ratings are observed.
2. 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.
„
RECOMMENDED OPERATING CONDITIONS
PARAMETER
SYMBOL
Supply Voltage
VCC
Input Voltage
Output Voltage
VIN
VOUT
High-Level Input Voltage
VIH
CONDITIONS
Operating
Data retention only
VCC=1.65V to 1.95V
VCC=2.3V to 2.7V
VCC=2.7V to 3.6V
VCC=1.65V to 1.95V
Low-Level Input Voltage
High-Level Output Current
Low-Level Output Current
VIL
IOH
IOL
TYP
MAX
3.6
UNIT
V
V
V
V
V
V
5.5
VCC
2
V
0.35×VCC
V
VCC=2.3V to 2.7V
0.7
V
VCC=2.7V to 3.6V
VCC=1.65V
0.8
-4
mA
VCC=2.3V
-8
mA
VCC=2.7V
-12
mA
VCC=3V
VCC=1.65V
VCC=2.3V
VCC=2.7V
VCC=3V
-24
mA
mA
mA
mA
mA
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MIN
1.65
1.5
0
0
0.65×VCC
1.7
4
8
12
24
V
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CMOS IC
ELECTRICAL CHARACTERISTICS
PARAMETER
SYMBOL
High-Level Output Voltage
VOH
Low-Level Output Voltage
VOL
Input Leakage Current
Power OFF Leakage Current
Output OFF-State Current
II(LEAK)
IOFF
IOZ
Quiescent Supply Current
IQ
Additional Quiescent Supply
Current
Input Capacitance
Output Capacitance
„
ΔIQ
CI
CO
MIN
TYP
VCC-0.2
1.29
1.9
2.2
2.4
2.3
MAX
V
0.1
0.24
0.3
0.4
0.55
±1
±1
±1
1
1
VCC=2.7V to 3.6V, One input at
VCC-0.6V,Other inputs at VCC or GND
VCC=3.3V, VIN=VCC or GND
VCC=3.3V, VOUT=VCC or GND
UNIT
500
4
5.5
V
uA
uA
uA
uA
uA
pF
pF
SWITCHING CHARACTERISTICS
PARAMETER
SYMBOL
From Input(A) to Output(Y)
tpd
From Input(OE ) to Output(Y)
ten
From Input(OE ) to Output(Y)
tdis
„
TEST CONDITIONS
VCC=1.65V to 3.6V, IOH=-100uA
VCC=1.65V, IOH=-4mA
VCC=2.3V, IOH=-8mA
VCC=2.7V, IOH=-12mA
VCC=3V, IOH=-12mA
VCC=3V, IOH=-24mA
VCC=1.65V to 3.6V, IOH=100uA
VCC= 1.65V, IOH=4mA
VCC=2.3V, IOH=8mA
VCC=2.7V, IOH=12mA
VCC=3V, IOH=24mA
VCC=3.6V, VIN=5.5 V or GND
VCC=0V, VIN or VOUT=5.5V
VCC=3.6V, VOUT=0 or GND
VCC=3.6V ,VIN=VCC or GND, IOUT=0
VCC=3.6V ,3.6V≦VIN≦5.5V, IOUT=0
TEST CONDITIONS
VCC=1.5V
VCC=1.8V±0.15V
VCC=2.5V±0.2V
VCC=2.7V
VCC=3.3V±0.3V
VCC=1.5V
VCC=1.8V±0.15V
VCC=2.5V±0.2V
VCC=2.7V
VCC=3.3V±0.3V
VCC=1.5V
VCC=1.8V±0.15 V
VCC=2.5V±0.2V
VCC=2.7V
VCC=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
MIN
TYP
43
43
44
1
1
2
MAX
UNIT
ns
ns
ns
OPERATING CHARACTERISTICS
PARAMETER
SYMBOL
Power Dissipation Capacitance
Cpd
TEST CONDITIONS
OE=0, f=10MHz, VCC=1.8V
OE=0, f=10MHz, VCC=2.5V
OE=0, f=10MHz, VCC=3.3V
OE=1, f=10MHz, VCC=1.8V
OE=1, f=10MHz, VCC=2.5V
OE=1, f=10MHz, VCC=3.3V
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pF
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CMOS IC
TEST CIRCUIT AND WAVEFORMS
tPLH/tPHL
VEXT
tPZH/tPHZ
tPZL/tPLZ
2KΩ
OPEN
GND
2*VCC
30pF
1KΩ
OPEN
GND
2*VCC
0.15V
30pF
500Ω
OPEN
GND
2*VCC
1.5V
0.3V
50pF
500Ω
OPEN
GND
6V
1.5V
0.3V
50pF
500Ω
OPEN
GND
6V
VCC
VIN
tR/tF
VM
V△
CL
RL
1.5V
VCC
≤2ns
VCC/2
0.1V
15pF
1.8V±0.15V
VCC
≤2ns
VCC/2
0.15V
2.5V±0.2V
VCC
≤2ns
VCC/2
2.7V
2.7V
≤2.5ns
3.3V±0.3V
2.7V
≤2.5ns
Fig-1 Load circuitry
Fig-2 Propagation delay waves
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U74LVC244
CMOS IC
UTC assumes no responsibility for equipment failures that result from using products at values that
exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or
other parameters) listed in products specifications of any and all UTC products described or contained
herein. UTC products are not designed for use in life support appliances, devices or systems where
malfunction of these products can be reasonably expected to result in personal injury. Reproduction in
whole or in part is prohibited without the prior written consent of the copyright owner. The information
presented in this document does not form part of any quotation or contract, is believed to be accurate
and reliable and may be changed without notice.
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