UM4157
0.8Ω Low-Voltage SPDT Analog Switch
UM4157
SOT363
General Description
The UM4157 is a low on resistance, low-power, Single Pole Double Throw (SPDT) analog switch.
This product has been designed for switching audio signals in applications such as cell phones
and portable media players. The ultra-low 0.8Ω impedance, sub
μA
current consumption, and
1.65V to 4.3V operating voltage range make this product ideal for battery-powered applications.
The UM4157 also features bidirectional operation and break-before-make functionality. This
device is fully specified for operation at 1.8V, 2.5V, and 3.3V.
Applications
Cellular Phone
PDA
Portable Media Player
Features
Typical 0.8Ω On Resistance (R
ON
) for
2.7V
Supply
0.23Ω typical R
ON
Flatness for
2.7V Supply
Broad V
CC
Operating Range: 1.65V to 4.3V
Low THD (0.02% Typical for 32Ω Load)
Control Logic is 1.8V CMOS Logic
Compatible
Pin Configurations
Top View
UM4157
SOT363
Ordering Information
Part Number
UM4157
Packaging Type
SOT363
Marking Code
U7H
Shipping Qty
3000pcs/7 Inch Tape & Reel
Function Table
Select Input
L
H
Function
B0 Connected to A
B1 Connected to A
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UM4157
Absolute Maximum Ratings
Supply Voltage
DC Switch Voltage (Note 1)
DC IN Voltage (Note 1)
DC Input Diode Current
DC Switch Current
Peak Switch Current
I
SWPEAK
150
(Pulsed at 1ms duration,
＜10%
Duty Cycle)
T
J
Junction Temperature Under Bias
+150
T
STG
Storage Temperature Range
- 65 to +150
T
L
Junction Lead Temperature (Soldering, 10seconds)
+260
ESD
Human Body Model
2000
P
D
SOT363 Package
180
Note 1: The input and output negative voltage ratings may be exceeded if the input and
diode current ratings are observed.
Symbol
V
CC
V
S
V
IN
I
IK
I
SW
Parameter
Limit
- 0.5 to + 5.5
- 0.5 to (V
CC
+ 0.3)
- 0.5 to + V
CC
-50
100
Unit
V
mA
°C
V
mW
output
Recommended Ratings
Symbol
V
CC
V
IN
V
IN
T
A
Parameter
Supply Voltage Operating
Control Input Voltage (Note 2)
Switch Input Voltage
Operating Temperature
Limit
1.65 to 4.3
0 to V
CC
0 to V
CC
-45 to +85
Unit
V
°C
Note 2: Unused inputs must be held HIGH or LOW, it must not float.
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UM4157
Electrical Characteristics
Limits (–40 to 85 °C)
Symbol
Parameter
Test Conditions
Vcc(V)
Temp
Min
DC Electrical Characteristics
I
IN
I
OFF(NO/N
C)
Unit
Typ
Max
Control Leakage
Current
OFF State Leakage
Current
On State Leakage
Current
0≤
V
I
N
≤
Vcc
A=0.3V, V
CC
-0.3V,
B
0
or B
1
=0.3V,
V
CC
-0.3V or Floating
A=0.3V, V
CC
-0.3V,
B
0
or B
1
=0.3V,
V
CC
-0.3V or Floating
1.65 to 4.3
1.95 to 4.3
1.95 to 4.3
3.6 to 4.3
Full
Room
Full
Room
Full
-0.5
-10
-50
-20
-100
1.4
+0.5
+10
+50
+20
+100
μA
nA
nA
I
ON(A)
V
IH
Input High Voltage
2.7 to 3.6
2.3 to 2.7
1.65 to 1.95
3.6 to 4.3
Full
1.3
1.1
0.9
0.7
0.5
0.4
0.4
-3
0.6
0.8
0.9
1.5
0.04
0.06
0.12
1.0
0.18
0.23
0.28
0.3
0.5
0.5
3
1.0
1.2
1.3
2.5
3.0
0.75
0.13
V
V
IL
Input Low Voltage
2.7 to 3.6
2.3 to 2.7
1.65 to 1.95
V
IN
=Vcc or GND
I
O
=0
I
OUT
=100mA, B
0
or
B
1
=0V,0.7V,3.6V,4.3V
I
OUT
=100mA, B
0
or
B
1
=0V,0.7V,2.0V,2.7V
I
OUT
=100mA, B
0
or
B
1
=0V, 0.7V, 2.0V,2.3V
I
OUT
=100mA,
B
0
or B
1
= 0.7V
4.3
4.3
2.7
2.3
1.65
4.3
Full
V
I
CC
Quiescent Supply
Current
Full
Full
Full
Full
Room
Full
Full
Full
Full
Full
Full
Full
Full
Room
μA
R
ON
On-Resistance (Note3)
Ω
ΔR
ON
On Resistance Match
Between Channels
(Note4)
I
OUT
=100mA,
B
0
or B
1
= 0.7V
2.7
2.3
1.65
4.3
Ω
0.20
R
FLAT
On Resistance Flatness
(Note5)
I
OUT
=100mA,
B
0
or B
1
= 0V to V
CC
2.7
2.3
1.65
Ω
0.6
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:
ΔR
ON
=
︱R
ON (B0)
−
R
ON(B1)
︱measured
at identical V
CC
, temperature and voltage levels.
Note 5: Flatness is defined as the difference between the maximum and minimum value of On Resistance over the specified range of
input voltage.
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UM4157
Electrical Characteristics
(Continued)
Limits (–40 to 85 °C)
Symbol
Parameter
Test Conditions
Vcc(V)
Temp
Min
AC Electrical Characteristics
3.6 to 4.3
t
ON
Turn-On Time
B
0
or B
1
=1.5V,
R
L
=50Ω, C
L
=35pF
2.7 to 3.6
2.3 to 2.7
1.65 to 1.95
3.6 to 4.3
t
OFF
Turn-Off Time
B
0
or B
1
=1.5V,
R
L
=50Ω, C
L
=35pF
2.7 to 3.6
2.3 to 2.7
1.65 to 1.95
t
BBM
Break Before Make Time
B
0
or B
1
=1.5V,
R
L
=50Ω, C
L
=35pF
1.65 to 4.3
3.6 to 4.3
Q
INJ
Charge Injection
C
L
= 1.0 nF,
V
GEN
= 0 V R
GEN
= 0Ω
2.7 to 3.6
2.3 to 2.7
1.65 to 1.95
O
IRR
Off Isolation
f = 100 kHz, R
L
=50Ω,
C
L
= 5pF(Stray),
1.65 to 4.3
3.6 to 4.3
Xtalk
Crosstalk
f = 100 kHz, R
L
=50Ω,
C
L
= 5pF(Stray),
2.7 to 3.6
2.3 to 2.7
1.65 to 1.95
BW
-3 dB Bandwidth
R
L
=50Ω
1.65 to 4.3
3.6 to 4.3
THD
Total Harmonic Distortion
R
L
=32Ω, V
IN
=2V
P-P
f=20Hz to 20kHz
R
L
=32Ω, V
IN
=1.5V
P-P
f=20Hz to 20kHz
R
L
=32Ω, V
IN
=1.2V
P-P
f=20Hz to 20kHz
2.7 to 3.6
2.3 to 2.7
1.65 to 1.95
Room
Room
Room
0.02
%
0.036
0.01
Room
Full
Room
Full
Room
Full
Full
Room
Full
Room
Full
Room
Full
Full
Full
Room
Room
Room
Room
Room
Room
Room
Room
Room
Room
-75
-75
-75
dB
-75
-70
70
MHz
dB
5
6
6
pC
6
40
70
55
60
60
65
65
70
90
30
35
35
40
40
45
55
ns
Typ
Max
Unit
ns
ns
Capacitance
C
IN
C
IO-B
C
IOA-ON
Control Pin Input
Capacitance
B Port Off Capacitance
A Port Capacitance when
Switch is Enabled
f=1MHz
f=1MHz
f=1MHz
0.0
4.5
4.5
Room
Room
Room
1.5
21.0
90.0
pF
pF
pF
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UM4157
Typical Characteristics
1: -75.204dB 100kHz
1: -3.000dB 72.1325MHz
80
60
20
15
40
10
20
5
S21 (dB)
S21 (dB)
0
0
1
-20
-40
-5
-10
-60
1
-80
-15
-20
1E05
1E06
1E07
1E08
1E05
1E06
1E07
1E08
FREQUENCY (Hz)
FREQUENCY (Hz)
Figure1. Off-Isolation at VCC=3.3V
Figure2. Bandwidth at VCC=-3.3V
1.05
1.05
1.00
1.00
0.95
Ron(m ohm)
Ron(m ohm)
0.0
0.5
1.0
1.5
2.0
2.5
0.95
0.90
0.85
0.80
0.75
0.70
0.90
0.85
0.80
0.75
0.0
0.5
1.0
1.5
2.0
2.5
VB(V)
Figure3. Switch On Resistance, Ion=100mA, Vcc=2.3V, B1
VB(V)
Figure4. Switch On Resistance, Ion=100mA,Vcc=2.5V,B1
0.75
0.70
Ron(m ohm)
0.65
0.60
0.55
0.50
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
VB(V)
Figure5. Switch On Resistance, Ion=100mA, Vcc=4.3V, B1
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