Datasheet

UNISONIC TECHNOLOGIES CO., LTD
U74LVC257
CMOS IC
QUADRUPLE 2-LINE TO 1-LINE
DATA
SELECTORS/MULTIPLEXERS
3-STATE OUTPUTS

DESCRIPTION
SOP-16
The U74LVC257 is designed for 1.65V to 3.6V VCC operation.
The U74LVC257 devices are designed to multiplex signals from
4-bit data sources to 4-output data lines in bus-organized systems.
The 3-state outputs do not load the data lines when the
output-enable ( OE ) input is at a high logic level.

FEATURES
* Operate From 1.65V to 3.6V
* Input Accept Voltages to 5.5V
* Partial-Power-Down Mode Operation
* Max tpd is 4.6ns at 3.3V

ORDERING INFORMATION
Ordering Number
U74LVC257G-S16-R

Package
SOP-16
Packing
Tape Reel
MARKING
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Copyright © 2016 Unisonic Technologies Co., Ltd
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CMOS IC

PIN CONFIGURATION

FUNCTION TABLE (each gate)
INPUTS
OUTPUT(Y)
A
B
INPUT( A / B )
H
X
X
X
Z
L
L
L
X
L
L
L
H
X
H
L
H
X
L
L
L
H
X
H
H
H = High voltage level;L = Low voltage level;X = Don’t care;Z = High-impedance OFF-state
INPUT( OE )
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U74LVC257

CMOS IC
LOGIC DIAGRAM (Positive Logic)
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
CMOS IC
ABSOLUTE MAXIMUM RATING
PARAMETER
Supply Voltage
Input Voltage
Output Voltage
SYMBOL
VCC
VIN
VOUT
CONDITIONS
Output in the high or low state
Output in the power-off state
RATINGS
-0.5 ~ +6.5
-0.5 ~ +6.5
-0.5 ~ VCC +0.5
-0.5 ~ +6.5
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
PARAMETER
SYMBOL
Supply Voltage
VCC
Input Voltage
Output Voltage
Operating Temperature
Input Transition Rise or Fall
Rate
VIN
VOUT
TA
TEST CONDITIONS
Operating
Data retention only
MIN
1.65
1.5
0
0
-40
0
TYP
MAX
3.6
VCC=1.65V ~ 2.7V
VCC=2.7V ~ 3.6V
0
Note: All unused inputs of the device must be held at VCC or GND to ensure proper device operation.

∆t/∆v
5.5
VCC
85
20
10
UNIT
V
V
V
V
°C
ns/V
ns/V
ELECTRICAL CHARACTERISTICS (TA =25°C , unless otherwise specified)
PARAMETER
SYMBOL
High-level Input Voltage
VIH
Low-level Input Voltage
VIL
High-Level Output Voltage
Low-Level Output Voltage
Input Leakage Current
Power OFF Leakage Current
OFF-state output current
VOH
VOL
II(LEAK)
Ioff
IOZ
TEST CONDITIONS
VCC=1.8V±0.15V
VCC=2.5V±0.2V
VCC=3.3V±0.3V
VCC=1.8V±0.15V
VCC=2.5V±0.2V
VCC=3.3V±0.3V
VCC=1.65V ~ 3.6V, IOH=-100μA
VCC=1.65V, IOH=-4mA
VCC=2.3V, IOH=-8mA
VCC=2.7V, IOH=-12mA
IOH=-12mA
VCC=3.0V
IOH=-24mA
VCC=1.65V ~ 3.6V, IOH=100μA
VCC=1.65V, IOH=4mA
VCC=2.3V, IOH=8mA
VCC=2.7V, IOH=12mA
VCC=3.0V, IOH=24mA
VCC=3.6V, VIN=5.5V or GND
VCC=0V, VIN or VOUT=5.5V
VIN = VIH or VIL, VCC=3.6V
VOUT=VCC or GND
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MIN
0.65×VCC
1.7
2
TYP
MAX
0.2
0.45
0.7
0.4
0.55
±5
±10
UNIT
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
μA
μA
±10
μA
0.35×VCC
0.7
0.8
VCC-0.2
1.2
1.7
2.2
2.4
2.2
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ELECTRICAL CHARACTERISTICS (Cont.)
PARAMETER
Quiescent Supply Current
Additional Quiescent Supply
Current Per Input Pin
Input Capacitance
Output Capacitance

CMOS IC
SYMBOL
ICC
∆ICC
CI
CO
MIN
TYP
MAX
UNIT
10
μA
500
μA
5.0
5.0
pF
pF
SWITCHING CHARACTERISTICS (TA =25°C , unless otherwise specified)
PARAMETER
SYMBOL
Propagation delay from input
(A or B) to output(Y)
tPD
Propagation delay from input
( A / B ) to output(Y)
Propagation delay from input
( OE ) to output(Y)
Propagation delay from input
( OE ) to output(Y)

TEST CONDITIONS
VCC=3.6V, VIN=VCC or GND,
IOUT=0A
VCC=2.7V~3.6V, One input at
VCC-0.6V, Other inputs at VCC or
GND
VCC= 3.3V, VIN= VCC or GND
VCC= 3.3V, VIN= VCC or GND
ten
ten
tdis
TEST CONDITIONS
VCC=1.8V±0.15V
CL=30pF
VCC=2.5V±0.2V
VCC=2.7V
CL=50pF
VCC=3.3V±0.3V
VCC=1.8V±0.15V
CL=30pF
VCC=2.5V±0.2V
VCC=2.7V
CL=50pF
VCC=3.3V±0.3V
VCC=1.8V±0.15V
CL=30pF
VCC=2.5V±0.2V
VCC=2.7V
CL=50pF
VCC=3.3V±0.3V
VCC=1.8V±0.15V
CL=30pF
VCC=2.5V±0.2V
VCC=2.7V
CL=50pF
VCC=3.3V±0.3V
MIN
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
TYP
MAX
13.5
7.4
5.4
4.6
15.6
9.5
7.5
6.4
14.6
8.7
6.7
5.6
15.4
6.7
4.7
4.3
UNIT
ns
ns
ns
ns
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±0.15V
VCC=2.5V±0.2V
VCC=3.3V±0.3V
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MIN
TYP
13.5
14.5
15.5
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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
Notes: 1. CL 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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