UNISONIC TECHNOLOGIES CO., LTD
U74LVC2G157
SINGLE 2-LINE TO 1-LINE
DATA SELECTOR OR
MULTIPLEXER
DESCRIPTION
The
U74LVC2G157
is a single 2-line to 1-line data selector or
multiplexer which is featured a common strobe (
G
) input. When the
strobe is high, the output Y is low and
Y
is high regardless of the
levels of other inputs. When the strobe is low, a single bit is selected
from one of two sources and is transferred to the output with the true
and complementary data.
This device has power-down protective circuit, preventing
device destruction when it is powered down.
SOP-8
CMOS IC
FEATURES
* Operate from 1.65V to 5.5V
* Inputs accept voltages to 5.5V
* I
off
supports partial-power-down mode
* Low power dissipation: I
CC
=10μA(Max.)
* ±24mA output drive(V
CC
=3.3V)
* Max tpd at 6ns of 3.3V
ORDERING INFORMATION
Ordering Number
Lead Free
U74LVC2G157L-S08-T
U74LVC2G157L-S08-R
Halogen Free
U74LVC2G157G-S08-T
U74LVC2G157G-S08-R
Package
SOP-8
SOP-8
Packing
Tube
Tape Reel
www.unisonic.com.tw
Copyright © 2012 Unisonic Technologies Co., Ltd
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QW-R502-809.A
U74LVC2G157
PIN CONFIGURATION
CMOS IC
FUNCTION TABLE
(EACH
GATE)
INPUTS
OUTPUT
A
B
Y
Y
H
X
X
X
L
H
L
L
L
X
L
H
L
L
H
X
H
L
L
H
X
L
L
H
L
H
X
H
H
L
Note: H: HIGH voltage level; L: LOW voltage level; X: Don’t care
G
A/B
LOGIC DIAGRAM
(positive logic)
G
A/B
7
6
A
1
5
Y
Y
B
2
3
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U74LVC2G157
ABSOLUTE MAXIMUM RATING
PARAMETER
Supply Voltage
Input Voltage
SYMBOL
V
CC
V
IN
RATINGS
-0.5 ~ +6.5
-0.5 ~ +6.5
-0.5 ~ V
CC
+0.5
CMOS IC
Output in the high or low state
Output Voltage
V
OUT
Output in the high-impedance or
-0.5 ~ +6.5
power-off state
V
CC
or GND Current
I
CC
±100
Continuous Output Current (V
OUT
=0 to V
CC)
I
OUT
±50
Input Clamp Current (V
IN
<0)
I
IK
-50
Output Clamp Current (V
OUT
<0 )
I
OK
-50
Storage Temperature Range
T
STG
-65 ~ +150
Note: 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.
UNIT
V
V
V
V
mA
mA
mA
mA
°C
RECOMMENDED OPERATING CONDITIONS
PARAMETER
Supply Voltage
Input Voltage
Output Voltage
High-Level Input Voltage
SYMBOL
V
CC
V
IN
V
OUT
V
IH
V
CC
=1.65V~1.95V
V
CC
=2.3V~2.7V
V
CC
=3.0V~3.6V
V
CC
=4.5V~5.5V
V
CC
=1.65V~1.95V
V
CC
=2.3V~2.7V
V
CC
=3.0V~3.6V
V
CC
=4.5V~5.5V
V
CC
=1.65V
V
CC
=2.3V
V
CC
=3.0V
V
CC
=3.0V
V
CC
=4.5V
V
CC
=1.65V
V
CC
=2.3V
V
CC
=3.0V
V
CC
=3.0V
V
CC
=4.5V
V
CC
=1.65V~1.95V, 2.3V~2.7V
V
CC
=3.0V~3.6V
V
CC
=4.5V~5.5V
TEST CONDITIONS
Operating
Data retention only
MIN
1.65
1.5
0
0
0.65*V
CC
1.7
2
0.7*V
CC
TYP
MAX
5.5
5.5
V
CC
UNIT
V
V
V
V
V
0.35*V
CC
0.7
0.8
0.3*V
CC
-4
-8
-16
-24
-32
4
8
16
24
32
20
10
5
85
Low-Level Input Voltage
V
IL
V
mA
mA
mA
mA
mA
mA
mA
mA
mA
mA
ns/V
ns/V
ns/V
°C
High-level Output Current
I
OH
Low-level Output Current
I
OL
Input Transition Rise or Fall
Rate
Operating Temperature
Δt/Δv
T
A
-40
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U74LVC2G157
ELECTRICAL CHARACTERISTICS
(T
A
=25°C , unless otherwise specified)
PARAMETER
SYMBOL
TEST CONDITIONS
V
CC
=1.65V~5.5V, I
OH
=-100μA
V
CC
=1.65V, I
OH
=-4mA
V
CC
=2.3V, I
OH
=-8mA
V
CC
=3.0V, I
OH
=-16mA
V
CC
=3.0V, I
OH
=-24mA
V
CC
=4.5V, I
OH
=-32mA
V
CC
=1.65V~5.5V, I
OH
=-100μA
V
CC
=1.65V, I
OH
=4mA
V
CC
=2.3V, I
OH
=8mA
V
CC
=3.0V, I
OH
=16mA
V
CC
=3.0V, I
OH
=24mA
V
CC
=4.5V, I
OH
=32mA
V
CC
=0V~5.5V, V
IN
=5.5V or GND
V
CC
=0V, V
IN
or V
OUT
=5.5V
V
CC
=1.65V~5.5V,
V
IN
=5.5V or GND, I
OUT
=0
V
CC
=3V~5.5V, One input at V
CC
-0.6V,
other inputs at V
CC
or GND
V
CC
=3.3V, V
IN
=V
CC
or GND
MIN
V
CC
-0.1
1.2
1.9
2.2
2.3
3.8
TYP
CMOS IC
MAX
UNIT
High-Level Output Voltage
V
OH
V
0.1
0.45
0.3
0.4
0.55
0.55
±5
±10
10
500
5
V
Low-Level Output Voltage
V
OL
Input Leakage Current
Power OFF Leakage Current
Quiescent Supply Current
Additional Quiescent Supply
Current
Input Capacitance
I
I(LEAK)
I
OFF
I
Q
ΔI
Q
C
IN
μA
μA
μA
μA
pF
SWITCHING CHARACTERISTICS
(T
A
=25°C , unless otherwise specified)
PARAMETER
Propagation delay from input
(A or B) to output(Y or
Y
)
SYMBOL
t
PLH
/t
PHL
TEST CONDITIONS
V
CC
=1.65V~1.95V
V
CC
=2.3V~2.7V
V
CC
=3.0V~3.6V
V
CC
=4.5V~5.5V
V
CC
=1.65V~1.95V
V
CC
=2.3V~2.7V
V
CC
=3.0V~3.6V
V
CC
=4.5V~5.5V
V
CC
=1.65V~1.95V
V
CC
=2.3V~2.7V
V
CC
=3.0V~3.6V
V
CC
=4.5V~5.5V
MIN
4.4
2.1
2
1.4
4.9
2.5
2.1
1.6
4.2
2
1.6
1.3
TYP
MAX
14
8
6
4
16
9
6
4
14
8
6
4
UNIT
ns
Propagation delay from input
(
A/B
) to output(Y or
Y
)
t
PLH
/t
PHL
ns
Propagation delay from input
(
G
) to output(Y or
Y
)
t
PLH
/t
PHL
ns
OPERATING CHARACTERISTICS
(T
A
=25°C , unless otherwise specified)
PARAMETER
Power Dissipation
Capacitance
SYMBOL
Cpd
TEST CONDITIONS
V
CC
=1.8V, f=10MHz
V
CC
=2.5V, f=10MHz
V
CC
=3.3V, f=10MHz
V
CC
=5V, f=10MHz
MIN
TYP
35
35
37
40
MAX
UNIT
pF
pF
pF
pF
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U74LVC2G157
TEST CIRCUIT AND WAVEFORMS
From Output
C
L
R
L
CMOS IC
TEST CIRCUIT
V
CC
V
CC
=1.65V~1.95V
V
CC
=2.3V~2.7V
V
CC
=3.0V~3.6V
V
CC
=4.5V~5.5V
Inputs
V
IN
V
CC
V
CC
3.0V
V
CC
t
R
, t
F
≤2ns
≤2ns
≤2.5ns
≤2.5ns
V
M
V
CC
/2
V
CC
/2
1.5V
V
CC
/2
C
L
30pF
30pF
50pF
50pF
R
L
1KΩ
500Ω
500Ω
500Ω
Note: 1. C
L
includes probe and jig capacitance.
2. All input pulses are supplied by generators having the following characteristics: PRR
≤10MHz,
Zo = 50Ω.
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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