WAS7222Q
WAS7222Q
USB High speed (480Mbps), DPDT Analog Switch
Http//:www.willsemi.com
Descriptions
The WAS7222Q is a high performance, double
pole double throw (DPDT) CMOS analog switch that
operates from a single +2.3V to +4.5V power supply.
The WAS7222Q is designed for switching of
high-speed USB2.0 signals in handset and consumer
applications, such as cell phones, digital cameras, and
notebooks with hubs or controllers with limited USB
I/Os.
The WAS7222Q has low bit-to-bit skew and high
channel-to-channel noise isolation, and is compatible
with various standards, such as high-speed USB 2.0
(480Mbps). Each switch is bi-directional and offers little
attenuation of the high-speed signals at the outputs. Its
bandwidth is quite marginal to pass high-speed USB
2.0 differential signals (480Mbps) with good signal
integrity.
The WAS7222Q is featured with special circuitry
on the D+/D-, which allows the device to withstand a
VBUS short to D+ or D- when the USB devices are
either powered off or on.
The SEL/OE pin has overvoltage protection that
allows voltages above VCC, up to 7.0V to be present
on the pin without damage or disruption of operation of
the part, regardless of the operating voltage. The
WAS7222Q is also featured with smart circuitry to
minimize VCC leakage current even when SEL/OE
control voltage is lower than VCC supply voltage. In
other word, there is no need of additional device to
shift SEL/OE level to be the same as that of VCC in
real application.
The WAS7222Q is available in QFN1418-10L
package.
Standard
products
are
Pb-Free
and
halogen-Free.
Device
WAS7222Q-10/TR
*
Marking
72 = Device code
= Month (A~Z)
QFN1418-10L
D1- D2-
OE
8
7
6
5
4
1
2
3
D-
GND
D+
VCC 9
SEL 10
D1+ D2+
Pin configuration (Top view)
72*
Order information
Package
QFN1418-10L
Shipping
3000/Reel&Tape
Applications
z
z
z
z
Cell phones
MID
Router
Other electronics equipments
Features
z
z
z
z
z
1
Supply voltage
-3dB Bandwidth
Off isolation
Crosstalk
: 2.3 ~ 4.5V
: 550MHz @ C
L
=5pF
: -36dB @ 250MHz
: -47dB @ 250MHz
Low quiescent current : <1uA
Jan, 2012 - Rev. 1.2
Will Semiconductor Ltd.
WAS7222Q
Pin descriptions
Pin Number
1
2
3
4
5
6
7
8
9
10
Symbol
D1+
D2+
D+
GND
D-
D2-
D1-
OE
VCC
SEL
Descriptions
Port A data 1 terminal, normally closed
Port A data 2 terminal, normally open
Port A common data terminal, Connect to D1+ or D2+ according to SEL logic
Ground
Port B common data terminal, Connect to D1- or D2- according to SEL logic
Port B data 2 terminal, normally open
Port B data 1 terminal, normally closed
Enable control, Active low
Power supply
Switch select pin, digital logic low or high.
Function descriptions
SEL
X
L
H
OE
H
L
L
Bus switch disconnected
D+ connect to D1+ and D- connect to D1-
D+ connect to D2+ and D- connect to D2-
Function
Logic symbol and typical applications
D+
D2+
D1-
D-
D2-
Control
SEL OE
USB I/F
D-
D+ / TX
TX
UART I/F
RX
Control
SEL OE
D- / RX
Logic Symbol
Typical Applications
Will Semiconductor Ltd.
2
Jan, 2012 - Rev. 1.2
MicroUSB Connector
D1+
D+
WAS7222Q
Absolute maximum ratings
Parameter
Supply voltage range
Data input/output voltage range
Select input voltage range
Continues output current
Junction temperature range
Lead temperature range
Storage temperature range
Thermal resistance
ESD protection (HBM)
Symbol
VCC
V
DATA
V
SEL
I
OUT
T
J
T
L
T
STG
R
JA
Value
-0.5 ~ 6.5
-0.5 ~ 6.5
-0.5 ~ 6.5
±50
150
260
-65 ~ 150
250
±7000
±5000
Unit
V
V
V
mA
o
o
o
o
C
C
C
C/W
V
V
I/O to VCC, I/O to GND
I/O to I/O
Recommend operating ratings
Parameter
Supply voltage range
Data input/output voltage range
Select input voltage range
Enable control input voltage range
Operating temperature range
Symbol
VCC
V
DATA
V
SEL
V
OE
T
A
Value
2.3 ~ 4.5
0.0 ~ VCC
0.0 ~ VCC
0.0 ~ VCC
-40 ~ 85
Unit
V
V
V
V
o
C
Will Semiconductor Ltd.
3
Jan, 2012 - Rev. 1.2
WAS7222Q
Electronics Characteristics
(Ta=25
o
C, VCC=4.5V, unless otherwise noted)
Parameter
Select and OE logic high level
Select and OE logic low level
Symbol
V
IH
V
IL
Conditions
VCC=3.0 4.5
VCC=2.3 3.0
VCC=3.0 4.5
VCC=2.3 3.0
I
OUT
=0,
Supply quiescent current
I
CC
V
SEL
>1.5V or
V
SEL
<0.7V
Refer to figure1
Select input leakage current
Off state switch leakage current
On state switch leakage current
I
SEL
I
OFF
I
ON
V
SEL
=VCC
See figure 2
See figure 3
VCC=3.0V,
On-Resistance
R
ON
V
DATA
=0~0.4V,
I
OUT
=8mA,
See figure 4
VCC=3.0V,
On-Resistance match
¨ R
ON
V
DATA
=0~0.4V,
I
OUT
=8mA,
See figure 4
VCC=3.0V,
On-Resistance flatness
R
FLAT(ON)
V
DATA
=0~1.0V,
I
OUT
=8mA,
See figure 4
Propagation delay time
Select input to switch on time
Select input to switch off time
Break-Before-Make time
-3dB Bandwidth
Off isolation
Crosstalk
Charge injection
(Select input to common I/O)
Select pin input capacitance
D1n, D2n,Dn Off capacitance
D1n, D2n,Dn On capacitance
T
PLH
/ T
PHL
T
ON
T
OFF
T
BBM
BW
OIRR
Xtalk
Qg
C
IN
C
OFF
C
ON
C
L
=10pF, R
L
=50
See figure 5
C
L
=10pF, R
L
=50
See figure 6
C
L
=10pF, R
L
=50
See figure 6
Generated by design
R
L
=50, C
L
=5pF
R
L
=50, C
L
=0pF
R
L
=50, F=250MHz
R
L
=50, F=250MHz
C
L
=0.1nF, VCC=3.3V
R
G
=0, V
G
=GND
VCC=0V
VCC=3.3V, OE=3.3V
VCC=3.3V, OE=0V
0.5
550
800
-36
-47
5
5
5
6.5
0.3
75
40
1.2
120
80
ns
ns
ns
ns
MHz
dB
dB
pC
pF
pF
pF
1.8
2.2
0.15
0.20
5.0
7.5
±1.0
±1.0
±1.0
uA
uA
uA
1.0
uA
Min.
1.7
1.4
0.6
0.4
Typ.
Max.
Unit
V
V
V
V
Will Semiconductor Ltd.
4
Jan, 2012 - Rev. 1.2
WAS7222Q
Typical Characteristics
(Ta=25
o
C, VCC=4.5V, unless otherwise noted)
Bandwidth
Off isolation
Crosstalk
50
40
Supply Current (uA)
30
20
10
0
-10
-20
0.0
0.5
1.0
1.5
2.0
2.5
3.0
VCC=3.6V
Eye Diagram (480Mbps)
3.5
4.0
Logic Level (V)
Figure 1: Supply current vs. Logic level
Will Semiconductor Ltd.
5
Jan, 2012 - Rev. 1.2
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