Datasheet UM3257 Rev03

UM3257
Low-Voltage Dual SPDT Analog Switch
UM3257 DFN12 3.0×1.6
General Description
The UM3257 is dual SPDT analog switch fabricated with silicon gate CMOS technology. It
achieves very low propagation delay and RDS(ON) resistances while maintaining CMOS low power
dissipation. These make it ideal for portable and battery power applications.
The switch conducts signals within power rails equally well in both directions when on, and
blocks up to the power supply level when off. Break-before-make is guaranteed.
The select pin has over-voltage protection that allows voltages above VCC, up to 6.5V to be
present on the pin without damage or disruption of operation of the part, regardless of the
operating voltage.
The UM3257 can maintain low power consumption for rail-to-rail signaling as long as the control
signal input is held at a level that is greater than VIH minimum and less than VIL maximum by
improving the control circuitry input buffer. so the part can be used in mixed voltage rail
environments, especially services the mobile handset applications very well allowing for the direct
interface with baseband processor general purpose I/Os, and it is no longer necessary to have the
control input equal to VCC to maintain low power consumption
The UM3257 is in a 12-pin, ROHS compliant, DFN12 package. It measures 3.0×1.6mm. The
leads are spaced at a pitch of 0.5mm and are finished with lead free Ni-Pd. The small package
makes it ideal for use in portable electronics such as cell phones, digital cameras and PDAs.
Applications
Features

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Sample-and-Hold Circuits
Battery-Powered Equipment
Audio and Video Signal Routing
Communication Circuits

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Pin Configurations
Lower ICC when the S Input is within the
Required VIH and VIL Bounds
Low ON-State Resistance (10Ω)
Control Inputs are 5V Tolerant
Low Charge Injection
Excellent ON-State Resistance Matching
Low Total Harmonic Distortion (THD)
1.65V to 5.5V Single-Supply Operation
ESD Performance:
Human Body Model>2kV
Machine Model>200V
DFN12 Package
Pb-Free Package
Top View
3257:XX
XX: Week Code
UM3257
DFN12 3.0×1.6
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UM3257
Ordering Information
Part Number
Packaging Type
Marking Code
UM3257
DFN12 3.0×1.6
3257
Shipping Qty
3000pcs/7 Inch
Tape & Reel
Function Table
Select Input
L
H
Function
B0 Connected to A
B1 Connected to A
Absolute Maximum Ratings
Symbol
Parameter
Limit
VCC
Supply Voltage
-0.5 to +6.5
VIS
DC Switch Input Voltage (Note 1)
-0.5 to (VCC+0.5)
VIN
DC IN Voltage (Note 1)
-0.5 to +6.5
IIK
-50
DC Input Diode Current @ VIN<0V
IOUT
DC Output Current
128
ICC/IGND
DC VCC or Ground Current
+100
TJ
Junction Temperature Under Bias
+150
TSTG
Storage Temperature
-65 to +150
TL
Junction Lead Temperature (Soldering, 10 Seconds)
260
θJA
Thermal Resistance
350
PD
Power Dissipation @ +85°C
180
Note 1: The input and output negative voltage ratings may be exceeded if the input and
diode current ratings are observed.
Unit
V
mA
°C
°C/W
mW
output
Recommended Ratings (Note2)
Symbol
VCC
VIS
VIN
VOUT
TA
Parameter
Supply Voltage Operating
Switch Input Voltage
Select Input Voltage
Output Voltage
Operating Temperature
Input Rise and Fall Time
tr, tf
Control Input VCC=2.3V to 3.6V
Control Input VCC=4.5V to 5.5V
Note 2: Select input must be held HIGH or LOW, it must not float.
Limit
1.65 to 5.5
0 to VCC
0 to VCC
0 to VCC
-55 to +125
Unit
0 to 10
0 to 5.0
ns/V
V
°C
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UM3257
Electrical Characteristics
Limits (–40°C to 85°C)
Symbol
Parameter
Test Conditions
VCC (V)
Temp
Unit
Min
Typ
Max
DC Electrical Characteristics
Analog Signal Range
VCC
IIN
Input Leakage Current
0≤VIN≤5.5V
IOFF
OFF State Leakage
Current
0≤A, B≤VCC
VIH
Input High Voltage
VIL
Input Low Voltage
ICC
Quiescent Supply
Current
RON
RRANGE
ΔRON
RFLAT
On-Resistance (Note3)
On Resistance Over
Signal Range
(Note3, 7)
On Resistance Match
Between Channels
(Note3, 4, 5)
On Resistance Flatness
(Note3, 4, 6)
0 to 5.5
1.65 to 5.5
1.65 to 1.95
2.3 to 5.5
1.65 to 1.95
2.3 to 5.5
VIN=VCC or GND
IO=0
VIN=0V, IO=30mA
VIN=2.4V, IO=-30mA
VIN=4.5V, IO=-30mA
VIN=0V, IO=24mA
VIN=3V, IO=-24mA
VIN=0V, IO=8mA
VIN=2.3V, IO=-8mA
VIN=0V, IO=4mA
VIN=1.65V, IO=-4mA
IA=-30mA ,
0≤VBn≤Vcc
IA=-24mA,
0≤VBn≤Vcc
5.5
Full
0
Room
Full
Room
Full
Full
±0.05
±0.05
VCC
V
±0.1
±1
±0.1
±1
μA
0.75Vcc
0.7Vcc
μA
V
Full
Room
Full
3.0
5.0
7.0
4.0
10
5.0
13
6.5
17
0.25Vcc
0.3Vcc
1.0
10
6.0
8.0
13
8.0
19
9.0
24
12
39
4.5
Full
3.0
Full
2.3
Full
1.65
Full
4.5
Full
25
3.0
Full
50
IA=-8mA, 0≤VBn≤Vcc
2.3
Full
100
IA=-4mA, 0≤VBn≤Vcc
1.65
Full
300
IA=-30mA, VBn = 3.15V
4.5
Room
0.15
IA=-24mA, VBn = 2.1V
3.0
Room
0.2
IA=-8mA, VBn = 1.6V
2.3
Room
0.5
IA=-4mA, VBn = 1.15V
1.65
Room
0.5
5.0
Room
5.0
3.3
Room
10
IA=-8mA, 0≤VBn≤Vcc
2.5
Room
24
IA=-4mA, 0≤VBn≤Vcc
1.8
Room
110
V
μA
Ω
Ω
Ω
IA=-30mA,
0≤VBn≤Vcc
IA=-24mA,
0≤VBn≤Vcc
Ω
Note 3: Measured by the voltage drop between A and B pins at the indicated current through the
switch. On Resistance is determined by the lower of the voltages on the two (A or B
Ports).
Note 4: Parameter is characterized but not tested in production.
Note 5: ΔRON=︱RON (A00Bn)−RON(A11Bn)︱ measured at identical VCC, temperature and voltage
levels.
Note 6: Flatness is defined as the difference between the maximum and minimum value of On
Resistance over the specified range of conditions.
Note 7: Guaranteed by design.
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UM3257
Electrical Characteristics (Continued)
Limits (–40°C to 85°C)
Symbol
Parameter
Test Conditions
VCC (V)
Temp
Unit
Min
Typ
Max
AC Electrical Characteristics
tPHL
tPLH
Propagation Delay
Bus to Bus (Note 9)
VI=OPEN
tPZL
tPZH
Output Enable Time
Turn On Time
(A to Bn)
VI=2×VCC for tPZL
VI=0V for tPZH
tPLZ
tPHZ
Output Disable Time
Turn Off Time
(A Port to B Port)
VI=2×VCC for tPLZ
VI=0V for tPHZ
tBBM
Break Before Make Time
(Note 8)
RL=50Ω, CL=35pF
QINJ
Charge Injection
(Note 8)
CL=0.1nF,
VGEN=0V, RGEN=0Ω
1.65 to1.95
2.3 to 2.7
3.0 to 3.6
4.5 to 5.5
1.65 to1.95
2.3 to 2.7
3.0 to 3.6
4.5 to 5.5
1.65 to1.95
2.3 to 2.7
3.0 to 3.6
4.5 to 5.5
1.65 to1.95
2.3 to 2.7
3.0 to 3.6
4.5 to 5.5
5.0
3.3
OIRR
Off Isolation (Note 10)
RL=50Ω, f=10 MHz
Xtalk
Crosstalk
BW
THD
1.2
0.8
0.3
Room
Full
Full
Full
7.0
3.5
2.5
1.7
3.0
2.0
1.5
0.8
0.5
0.5
0.5
0.5
ns
32
14
7.6
5.7
28
15
11
8
ns
ns
ns
Room
7.0
3.0
pC
1.65 to 5.5
Room
-55
dB
RL=50Ω, f=10 MHz
1.65 to 5.5
Room
-54
dB
-3dB Bandwidth
RL=50Ω
2.5 to 5.5
Room
250
MHz
Total Harmonic Distortion
(Note8)
RL=600Ω,
0.5VP-P,
f=600Hz to 20kHz
2.5
5.0
Room
0.014
0.004
%
VCC=0V
2.3
pF
VCC=5.0V
6.5
pF
VCC=5.0V
18.5
pF
Capacitance
CIN
CIO-B
CIOA-ON
IN Pin Input Capacitance
(Note11)
B Port Off Capacitance
(Note11)
A Port Capacitance when
Switch is Enabled
(Note11)
Note 8: Guaranteed by design.
Note 9: This parameter is guaranteed by design but not tested. The bus switch contributes no
propagation delay other than the RC delay of the On Resistance of the switch and the 35
pF load capacitance, when driven by an ideal voltage source (zero output impedance).
Note 10: Off Isolation=20log10 [VA/VBn].
Note 11: TA=+25°C, f=1MHz, Capacitance is characterized but not tested in production.
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UM3257
Test Circuits/Timing Diagrams
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UM3257
Typical Operating Characteristics
Total Harmonic Distortion vs. Frequency
RON vs. VIN vs. Temperature @ VCC=4.5V
RON vs. VIN vs. Temperature @ VCC=3.0V
On-Resistance vs. Input Voltage
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UM3257
Typical Operating Characteristics (Continued)
Bandwidth vs. Frequency
Off-Isolation vs. Frequency
Phase Angle vs. Frequency
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UM3257
Package Information
UM3257 DFN12 3.0×1.6
Outline Drawing
DIMENSIONS
Symbol
D2
E
E2
L
D
C'0.2×45º
(Pin #1 ID)
e
Top View
Bottom View
Side View
A3
E2
A1
A
PIN 1 DOT
BY MARKING
b
MILLIMETERS
INCHES
Min
Typ
Max
Min
Typ
Max
A
0.50
0.55
0.605
0.020
0.022
0.024
A1
0.00
-
0.05
0.000
-
0.002
A3
0.15REF
0.006REF
b
0.20
0.25
0.30
0.008
0.010
0.012
D
2.95
3.00
3.075
0.116
0.118
0.121
D2
2.10
2.20
2.30
0.083
0.087
0.091
E
1.55
1.60
1.675
0.061
0.063
0.066
E2
0.25
-
0.50
0.010
-
0.020
e
L
0.50TYP
0.23
-
0.020TYP
0.38
0.009
-
0.015
Land Pattern
3.00
2.00
0.58
0.40
1.60
0.20
2.20
0.50
0.25
NOTES:
1. Compound dimension: 3.00×1.60;
2. Unit: mm;
3. General tolerance ±0.05mm unless other- wise
specified;
4. The layout is just for reference.
Tape and Reel Orientation
3257:XX
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UM3257
GREEN COMPLIANCE
Union Semiconductor is committed to environmental excellence in all aspects of its
operations including meeting or exceeding regulatory requirements with respect to the use
of hazardous substances. Numerous successful programs have been implemented to
reduce the use of hazardous substances and/or emissions.
All Union components are compliant with the RoHS directive, which helps to support
customers in their compliance with environmental directives. For more green compliance
information, please visit:
http://www.union-ic.com/index.aspx?cat_code=RoHSDeclaration
IMPORTANT NOTICE
The information in this document has been carefully reviewed and is believed to be
accurate. Nonetheless, this document is subject to change without notice. Union assumes
no responsibility for any inaccuracies that may be contained in this document, and makes
no commitment to update or to keep current the contained information, or to notify a
person or organization of any update. Union reserves the right to make changes, at any
time, in order to improve reliability, function or design and to attempt to supply the best
product possible.
Union Semiconductor, Inc
Add: Unit 606, No.570 Shengxia Road, Shanghai 201210
Tel: 021-51093966
Fax: 021-51026018
Website: www.union-ic.com
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