Datasheet

UNISONIC TECHNOLOGIES CO., LTD
U74LVC157
CMOS IC
QUADRUPLE 2-LINE TO 1-LINE
DATA
SELECTORS/MULTIPLEXERS

DESCRIPTION
The U74LVC157 is designed for 1.65V to 3.6V VCC operation.
The device features a common strobe ( G ) input. When ( G ) is
high, all outputs are low. When G is low, a 4-bit word is selected
from one of two sources and is routed to the four outputs.

SOP-16
FEATURES
* Operate From 1.65V to 3.6V
* Inputs Accept Voltages to 5.5V
* Max tpd of 5.0ns at 3.3V
* Typical VOLP (Output Ground Bounce)<0.8V at VCC=3.3V, TA=25°C
* Typical VOHV (Output VOH Undershoot)>2V at VCC=3.3V, TA=25°C

ORDERING INFORMATION
Ordering Number
U74LVC157G-S16-R
U74LVC157G-S16-R

Package
SOP-16
(1) Packing Type
(1) R: Tape Reel
(2) Package Type
(2) S16: SOP-16
(3) Green Package
(3) G: Halogen Free and Lead Free
Packing
Tape Reel
MARKING
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U74LVC157


CMOS IC
PIN CONFIGURATION
FUNCTION TABLE
INPUTS
A
B
A /B
H
X
X
X
L
L
L
X
L
L
H
X
L
H
X
L
L
H
X
H
Note: H: HIGH voltage level; L: LOW voltage level; X: Don’t care.
G
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OUTPUT Y
L
L
H
L
H
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U74LVC157

CMOS IC
LOGIC DIAGRAM (positive logic)
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U74LVC157

CMOS IC
ABSOLUTE MAXIMUM RATING
PARAMETER
Supply Voltage
Input Voltage
Output Voltage
SYMBOL
VCC
VIN
VOUT
CONDITIONS
RATINGS
-0.5 ~ +6.5
-0.5 ~ +6.5
-0.5 ~ VCC +0.5
-0.5 ~ +6.5
Output in the high or low state
Output in the power-off state
UNIT
V
V
V
V
Continuous VCC or GND
ICC
±100
mA
Current
Continuous Output Current
IOUT
VOUT=0V ~ VCC
±50
mA
Input Clamp Current
IIK
VIN<0V
-50
mA
Output Clamp Current
IOK
VOUT>VCC or VOUT<0V
-50
mA
Storage Temperature Range
TSTG
-65 ~ +150
°C
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.

RECOMMENDED OPERATING CONDITIONS (TA =25°C , unless otherwise specified)
PARAMETER
Supply Voltage
Input Voltage
Output Voltage
SYMBOL
VCC
VIN
VOUT
High-level input voltage
VIH
Low-level input voltage
VIL
TEST CONDITIONS
Operating
VCC=1.65V~1.95V
VCC=2.3V~2.7V
VCC=2.7V~3.6V
VCC=1.65V~1.95V
VCC=2.3V~2.7V
VCC=2.7V~3.6V
MIN
1.65
0
0
TYP
MAX
3.6
5.5
VCC
0.65×VCC
V
1.7
2
0.35×VCC
V
0.7
0.8
Input Transition Rise or Fall
∆t/∆v
10
Rate
Operating Temperature
TA
-40
85
Note: All unused inputs of the device must be held at VCC or GND to ensure proper device operation.

UNIT
V
V
V
ns/V
°C
ELECTRICAL CHARACTERISTICS (TA =25°C , unless otherwise specified)
PARAMETER
High-Level Output Voltage
Low-Level Output Voltage
SYMBOL
VOH
VOL
TEST CONDITIONS
VCC=1.65~3.6V, IOH=-100μA
VCC=1.65V, IOH=-4mA
VCC=2.3V, IOH=-8mA
VCC=2.7V, IOH=-12mA
VCC=3.0V, IOH=-12mA
VCC=3V, IOH=-24mA
VCC=1.6 ~3.6V, IOL=100μA
VCC=1.65V, IOL=4mA
VCC=2.3V, IOL=8mA
VCC=2.7V, IOL=12mA
VCC=3V, IOL=24mA
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MIN
VCC-0.2
1.29
1.9
2.2
2.4
2.3
TYP
MAX
UNIT
V
0.1
0.24
0.30
0.40
0.55
V
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ELECTRICAL CHARACTERISTICS (Cont.)
PARAMETER
Input Leakage Current
Power OFF Leakage Current
Quiescent Supply Current
Additional Quiescent Supply
Current Per Input Pin
Input Capacitance

CMOS IC
SYMBOL
TEST CONDITIONS
II(LEAK)
VCC=3.6V, VIN=5.5V or GND
IOFF
VCC=0V, VIN or VOUT=5.5V
VIN=VCC or GND, IOUT=0
ICC
VCC=3.6V
VCC=2.7V~3.6V, One input at
∆ICC
VCC-0.6V, Other inputs at VCC or
GND
CI
VCC=3.3V, VIN=VCC or GND
TYP
MAX
±1
±10
UNIT
μA
μA
1
μA
500
μA
5
pF
SWITCHING CHARACTERISTICS (TA =25°C , unless otherwise specified)(see Figure 1)
PARAMETER
SYMBOL
Propagation delay from input
(A or B) to output(Y)
tPLH/tPHL
Propagation delay from input
( A / B ) to output(Y)
Propagation delay from input
( G ) to output(Y)

MIN
tPLH/tPHL
tPLH/tPHL
TEST CONDITIONS
VCC=1.8V±0.15V, CL=30pF
VCC=2.5V±0.2V, CL=30pF
VCC=2.7V, CL=50pF
VCC=3.3V±0.3V, CL=50pF
VCC=1.8V±0.15V, CL=30pF
VCC=2.5V±0.2V, CL=30pF
VCC=2.7V, CL=50pF
VCC=3.3V±0.3V, CL=50pF
VCC=1.8V±0.15V, CL=30pF
VCC=2.5V±0.2V, CL=30pF
VCC=2.7V, CL=50pF
VCC=3.3V±0.3V, CL=50pF
MIN
1
1
1
1
1
1
1
1
1
1
1
1
TYP
5.5
3.2
3.6
3
6
3.7
4.1
3.4
5.9
3.5
3.9
3.3
MAX
13.5
7.4
5.7
5
15.5
9.6
7.9
6.6
13.5
9.3
7.6
6.3
UNIT
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
MAX
UNIT
pF
pF
pF
OPERATING CHARACTERISTICS (f=10MHz, TA =25°C , unless otherwise specified)
PARAMETER
Power Dissipation
Capacitance
SYMBOL
CPD
TEST CONDITIONS
VCC=1.8V
VCC=2.5V
VCC=3.3V
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MIN
TYP
14
15
16
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U74LVC157

CMOS IC
TEST CIRCUIT AND WAVEFORMS
INPUTS
VCC
1.8V±0.15V
2.5V±0.2V
2.7V
3.3V±0.3V
VIN
VCC
VCC
2.7V
2.7V
tR/tF
≤2ns
≤2ns
≤2.5ns
≤2.5ns
VM
VLOAD
CL
RL
V△
VCC/2
VCC/2
1.5V
1.5V
2×VCC
2×VCC
6V
6V
30pF
30pF
50pF
50pF
1KΩ
500Ω
500Ω
500Ω
0.15V
0.15V
0.3V
0.3V
Note: 1. CL includes probe and jig capacitance.
2. All input pulses are supplied by generators having the following characteristics: PRR ≤10MHz, ZO=50Ω.
Figure 1. Test Circuit and Voltage Waveforms
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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