FSA221 [FAIRCHILD]
USB2.0 High-Speed (480Mbps) and Audio Switches with Negative Signal Capability; USB2.0高速传输（480Mbps ）和音频处理负信号功能的开关
| 型号： | FSA221 |
| 厂家： | 
FAIRCHILD SEMICONDUCTOR |
| 描述： | USB2.0 High-Speed (480Mbps) and Audio Switches with Negative Signal Capability |
| 文件： | 总18页 (文件大小：328K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
Click here for this datasheet
translated into Chinese!
November 2006
FSA221 USB2.0 High-Speed (480Mbps) and
Audio Switches with Negative Signal Capability
Features
Description
The FSA221 is a Double-Pole, Double Throw (DPDT)
multiplexer that combines a low-distortion audio and a
USB2.0 High-Speed (HS) switch path. This
configuration enables audio and USB data to share a
common connector port. The architecture is designed to
allow audio signals to swing below ground. This means a
common USB and headphone jack can be used for personal
media players and similar portable peripheral devices.
HS-USB: 4Ω Typical On Resistance
Audio: 3Ω Typical On Resistance
-3db Bandwidth: > 720MHz
Low Power Consumption
Packaged in Pb-free 10-Lead MicroPak™
(1.6 x 2.1mm), 10-pin MSOP (Preliminary)
Since USB2.0 is an industry standard for shared data-
path in portable devices, the FSA221 also incorporates
a Vbus detection capability. The FSA221 includes a
power-off feature to minimize current consumption when
Vbus is not present. This power-off circuitry is available
for the common D+/R, D-/L ports only. Typical
applications involve switching in portables and
consumer applications, such as cell phones, digital
cameras, and notebooks with hubs or controllers.
Power-off Protection on Common D+/R, D-/L Ports
Automatically Detects Vbus for Switch Path
Selection
D+/R, D-/L Ports: 8pf Typical On Capacitance
Applications
Cell Phone, PDA, Digital Camera, and Notebook
LCD Monitor, TV, and Set-top Box
Ordering Information
Part Number
Package Number Top Mark Pb-Free
Package Description
FSA221L10X
MAC010A
MUA10A
MLP010A
GK
FSA221
GL
Yes
Yes
Yes
10-Lead MicroPak, JEDEC MO-255, 1.6 x 2.1mm
10-Lead MSOP JEDEC MO-187, 3.0 mm Wide
10-Lead Quad, Ultrathin MLP, 1.4 x 1.8mm
FSA221MUX (Preliminary)
FSA221UMX (Preliminary)
Vbus
ASel
Switch Select
Control Circuitry
Vaudio
R
pd
D+
R
GND
D+/R
D-
L
D-/L
Figure 1.
FSA221 Analog Symbol
© 2006 Fairchild Semiconductor Corporation
FSA221 Rev. 1.0.3
www.fairchildsemi.com
Pin Assignments
Vbus
10
1
R
D-
9
D+
D-
R
ASel
D+
1
10
9
Vbus
2
1
3
4
10 D+
L
GND
Vaudio
D-
R
2
3
ASel
D+/R
D-/L
2
3
8
7
6
D+/R
9
Vbus
ASel
8
L
4
5
D-/L
7
6
5
8
6
7
GND
Vaudio
D-/L D+/R
L
4
Vaudio
5
Gnd
Figure 2.
10-Pin MicroPak
Figure 3.
10-Pin MSOP
Figure 4.
10-Pin µMLP
Pin Descriptions
Name
Description
Vaudio
Vbus
Power supply (audio)
Power supply (USB) and auto USB switch-path select
ASel
Audio select to override auto USB detect when VAUDIO supply is present
USB data bus input sources
D+, D-
R, L
Audio right and left input sources
D+/R, D-/L
USB and audio common connector ports
Truth Table
(1)
ASel
Vaudio
Vbus
L, R
D+, D-
L
L
L
H(2)
H(2)
L
L
H(2)
L
OFF
OFF
ON
OFF
ON
L
L
OFF
ON
L
H(2)
OFF
OFF
OFF
ON
H
L
OFF
ON
H
L
H(2)
L
H(2)
H
H
H(2)
H(2)
OFF
OFF
ON
Notes:
1.
ASel - Internal resistor to GND provides auto-Vbus detect if there is no external connection. Forcing ASel HIGH
when VAUDIO is present overrides the USB path even if Vbus is present.
2. H - Value is the threshold as defined to meet USB2.0 Vbus requirements and audio supply threshold in a system
(see DC Tables).
© 2006 Fairchild Semiconductor Corporation
FSA221 Rev. 1.0.3
www.fairchildsemi.com
2
Functional Description
The FSA221 is a combined USB and audio switch that
enables sharing the D+/D- lines of a USB connector with
stereo audio CODEC outputs. The switch is optimized
for high-speed USB signals and includes an automatic
Vbus-detection circuit. When a USB connector, rather
than a headphone, is connected to the ultra-portable
device the switch is automatically configured for high-
speed USB data transfer. If no Vbus is detected, and yet
VAUDIO is present, the switch is configured for the low-
distortion audio switch path. The audio switch path also
handles negative signals (down to -2V), which
eliminates the need for large coupling capacitors.
control, to the audio path. The ASel pin is internally
terminated by a resistor to GND (typical value 3MΩ) and
requires no connection for the standard ultra-portable
(cell-phone, MP3, or portable media player). In an
application where the supply to the FSA221 Vbus pin is
not guaranteed to be removed, a GPIO pin can be used
to switch out of high-speed USB mode into audio mode,
using the ASel pin.
The FSA221 Vbus pin must be connected directly to Vbus
or a supply > 3.8V, not an LDO regulated down to 3.6V
or a Vbat-generated supply that may fall below 3.8V in
normal operation.
For those applications where the Vbus is generated as a
self-powered device or where Vbus is not removed, the
ASel pin provides the ability to switch, under software
Application Diagram
Vbus
–
3.0V 3.6V
ASel
5V
Switch Select
Control Circuitry
Vaudio
D+
R
pd
USB 2.0
-
FS USB
GND
D+/R
Vbus
Source
R
USB
-
Mini AB
D-
Connector
ID
D-
/L
Audio
CODEC
L
GND
Figure 5.
FSA221 Typical Application Diagram
© 2006 Fairchild Semiconductor Corporation
FSA221 Rev. 1.0.3
www.fairchildsemi.com
3
Absolute Maximum Ratings
The “Absolute Maximum Ratings” are those values beyond which the safety of the device cannot be guaranteed.
The device should not be operated at these limits. The parametric values defined in the Electrical Characteristics
tables are not guaranteed at the absolute maximum ratings. The “Recommended Operating Conditions” table defines
the conditions for actual device operation.
Symbol
Parameter
Conditions
VAudio
Vbus
Supply Voltage
Supply Voltage
-0.5V to 6.0V
-0.5V to 6.0V
(Vaudio- 7.0V) to (Vaudio+ 0.3V)
(Vbus- 7.0V) to (Vbus+ 0.3V)
-0.5V to + 6.0V
- 50mA
R, L Pins
VSW
Switch I/O Voltage(3)
D+, D-, D+/R, D-/L Pins
ASel
IIK
Control Input Voltage(3)
Input Clamp Diode Current
Switch I/O Current (Continuous)
USB
50mA
ISW
Audio
USB
50mA
Peak Switch Current (Pulsed at 1ms
Duration, <10% Duty Cycle)
100mA
ISWPEAK
Audio
100mA
TSTG
TJ
Storage Temperature Range
-65°C to +150°C
+150°C
Maximum Junction Temperature
Lead Temperature (Soldering, 10 seconds)
TL
+260°C
I/O to GND
7000
Human Body Model
(JEDEC: JESD22-A114)
All Other Pins
7000
ESD
VAudio Vbus to GND
12000
Charge Discharge Model (JEDEC-JESD-C101)
2000
Notes:
3. The input and output negative ratings may be exceeded if the input and output diode current ratings are
observed.
Recommended Operating Conditions
Recommended operating conditions are specified to ensure optimal performance to the datasheet specifications.
Fairchild does not recommend exceeding or designing to Absolute Maximum Ratings.
Symbol
Parameter
Minimum
Maximum
VAudio
Vbus
ASel
Supply Voltage
Supply Voltage
3.0V
4.25V
3.6V
5.5V
Control Input Voltage
0V
VAudio
VAudio - 6.5V
Vbus - 6.5V
-40ºC
VAudio – 0.3V
Vbus
VSW
Switch I/O Voltage
TA
Operating Temperature
85ºC
MicroPak 10L
package
Thermal Resistance (free air)
330ºC / W (estimated)
θJA
© 2006 Fairchild Semiconductor Corporation
FSA221 Rev. 1.0.3
www.fairchildsemi.com
4
DC Electrical Characteristics
All typical values are at 25ºC unless otherwise specified.
VAudio
TA = - 40°C to +85°C
Min. Typ. Max.
Symbol
Parameter
Conditions
Unit
(V)
Common Pins
VAudio (V)
Clamp Diode
Voltage
VIK
VIH
VIL
IIN
3.0
IIK = -18mA
-1.2
Control Input
Voltage HIGH
V
3.0 to 3.6
3.0 to 3.6
3.6
1.2
Control Input
Voltage LOW
0.5
VIN = 3.6V
IN = 0V
-1
-1
10
1
ASel Input HIGH
µA
µA
Current
V
Power Off Leakage
Current (Common
Port Only D+/R,
D-/L)
Vaudio
=
Common Port (D+/R, D-/L)
IOFF
10
Vbus = 0V VSW = 0V to 5.5V
INO(0FF)
Off-Leakage
Current of Port
D+, D-, R, L
3.6
3.6
Vbus = 0V, 5. 5V
D+/R, D-/L = 0.3V, VAUDIO – 0.3V
D+, D-, R, L = 0.3V, VAUDIO –0.3V
or Floating
-50
-50
1
50
nA
See Figure 11
INC(0N)
On-Leakage
Current of Port
D+/R or D-/L
Vbus = 0V, 5.5V
D+/R, D-/L = 0.3V, VAUDIO – 0.3V
D+, D-, R, L = Floating
1
3
50
nA
See Figure 12
RPD
ASel Internal Pull-
MΩ
Down Resistor
USB Switch Path
USB Analog Signal
Vbus (V)
4.25
0
3.6
6
V
Ω
Ω
Range
HS Switch On
Resistance(4)
VD+/D- = 0V, 0.4V, ION = -8mA,
RONUSB
4
V
AUDIO = 3V
VD+/D- = 0V, ION = -8mA,
AUDIO = 3V
(5,6)
∆ RONUSB HS Delta RON
4.25
0.4
V
Audio Switch Path
VAudio (V)
Audio Analog
Signal Range
Vaudio
5.5
–
Vaudio
5
V
Audio Switch On
RONAudio
VL/R = -2V, 0V, 0.7V, Vbus = 0V
AUDIO-0.7V, VAUDIO ION = -26mA
3.0
3.0
3.0
3
Ω
Ω
Ω
Resistance(4)
V
(5)
∆ RONAudio Audio Delta RON
VL/R = 0.7V ION = -26mA
0.4
1.5
Audio RON
RFLAT(Audio)
ION = -26mA
2.5
Flatness(7)
Continued on following page…
© 2006 Fairchild Semiconductor Corporation
FSA221 Rev. 1.0.3
www.fairchildsemi.com
5
DC Electrical Characteristics (Continued)
All typical values are at 25ºC unless otherwise specified.
TA = - 40°C to +85°C
VAudio
(V)
Symbol
Parameter
Conditions
Unit
Min.
Typ. Max.
Power Supply
Vbus Threshold
Voltage
Vbusth
Vaudioth
ICC(Audio)
3.2
0.5
3.8
1.5
V
V
Vaudio Threshold
Quiescent Supply
Current (Audio)
3.6
3.6
VASel = 0 to Vaudio, IOUT = 0
VASel = 0 to Vaudio, IOUT = 0
6
10
20
µA
Quiescent Supply
ICC(Vbus)
12
µA
µA
Current (Vbus
)
V
bus = 5.5V
VASel = 2.6V, Vbus = floating
ASel =1.8V, Vbus = floating
Increase in ICC
current per control
voltage and VCC
10
14
15
18
ICCT
Notes:
V
4. On resistance is determined by the voltage drop between the A and B pins at the indicated current through the switch.
5. ∆ RON = RON max – RON min measured at identical VCC, temperature, and voltage. Worst-case signal path, audio or
USB channel, is characterized.
6. Guaranteed by characterization, not production tested.
7. Flatness is defined as the difference between the maximum and minimum values of on resistance over the
specified range of conditions.
© 2006 Fairchild Semiconductor Corporation
FSA221 Rev. 1.0.3
www.fairchildsemi.com
6
AC Electrical Characteristics
All typical value are for VAUDIO = 3.3V and Vbus = 5.0 at 25ºC unless otherwise specified.
TA = - 40°C to +85°C
Min. Typ. Max.
V
audio/Vbus
(V)
Symbol
Parameter
Conditions
Unit
μs
tONAUDIO1
Turn-On Time VAUDIO↑ to
Vbus = 0V
V
D+/R, D-/L = 1.0V
RL = 50Ω, CL = 50pF
Output
10
10
2
Figure 13, Figure 15
tOFFAUDIO1
tONAUDIO2
tOFFAUDIO2
tONAUDIO3
tONUSB
Turn-Off Time VBus↑ to
VAUDIO = 3.0
for Vbus
VD+/R, D-/L = 1.0V
RL = 50Ω, CL = 50pF
Output
↑
μs
Figure 13, Figure 15
Turn-On Time ASel to
Output
Vbus = 4.25V
AUDIO = 3.0
VD+/R, D-/L = 1.0V
RL = 50Ω, CL = 50pF
V
μs
Figure 13, Figure 14
Turn-Off Time ASel to
Output
Vbus = 4.25V
AUDIO = 3.0
VD+/R, D-/L = 1.0V
RL = 50Ω, CL = 50pF
V
2
μs
Figure 13, Figure 14
Turn-On Time VBus↓ to
VAUDIO = 3.0
VD+/R, D-/L = 1.0V
RL = 50Ω, CL = 50pF
Output
10
10
μs
Figure 13, Figure 15
Turn-On Time VUSB↑ to
VAUDIO = 3.0
VD+/R, D-/L = 1.0V
RL = 50Ω, CL = 0pF
Output
μs
Figure 13, Figure 15
tOFFUSB
Turn-Off Time VUSB↓ to
VAUDIO = 3.0
VD+/R, D-/L = 1.0V
Output
RL = 50Ω, CL = 0pF
Figure 13, Figure 15
RL = 50Ω, CL = 0pF
Figure 16
10
μs
ns
dB
tPDUSB
XtalkA
USB Switch Propagation
Delay(8)
VAUDIO = 3.0
0.25
Vbus = 4.25V
Non-Adjacent Channel
Crosstalk - Audio
VAUDIO = 3.0
f = 20kHz, RT = 32Ω,
CL = 0pF
Vbus = 4.25V
-110
Figure 7, Figure 21
BW
-3db Bandwidth - USB
V
V
AUDIO = 3.0
bus = 4.25V
RT = 50Ω, CL = 0pF,
Signal 0dBm
720
MHz
%
Figure 9, Figure 19
THD
Total Harmonic Distortion
V
V
AUDIO = 3.0
bus = 0V
f = 20Hz to 20 kHz
RL = 32Ω, VIN = 2Vpp
0.05
Figure 24
Notes:
8. Guaranteed by characterization, not production tested.
© 2006 Fairchild Semiconductor Corporation
www.fairchildsemi.com
FSA221 Rev. 1.0.3
7
USB High-Speed-Related AC Electrical Characteristics
TA = - 40°C to +85°C
Min. Typ. Max.
VAUDIO
/
Symbol
Parameter
Conditions
Unit
Vbus(V)
tR = tF = 750ps
(10-90%) at 240MHz
CL = 0pF, RL = 50Ω
VAUDIO = 3.0V
Vbus = 4.25V
tSK(o)
Channel-to-Channel Skew(9)
35
35
Figure 17, Figure 18
ps
tR = tF = 750ps
(10-90%) at 240MHz
CL = 0pF, RL = 50Ω
Skew of Opposite Transitions
of the Same Output(9)
VAUDIO = 3.0V
tSK(P)
Vbus = 4.25V
Figure 17, Figure 18
RL = 50ꢀ,
CL = 50pF,
V
V
AUDIO = 3.0V
bus = 4.25V
tR = tF = 500ps
(10-90%) at
480Mbps
tJ
Total Jitter(9)
130
ps
(PRBS = 215 – 1)
Notes:
9. Guaranteed by characterization, not production tested.
Capacitance
TA = - 40°C to +85°C
Min. Typ. Max.
Symbol
Parameter
VAUDIO/ Vbus(V)
Conditions
Unit
Control Pin Input
Capacitance (ASel
VAUDIO = 3.0V
CIN (ASel)
VBias = 0.2V
2.0
pF
)
V
bus = 4.25V
VAUDIO = 3.0V
bus = 4.25V
Sel = 0V
(CONUSB
VAUDIO = 3.0V
bus = 4.25V
Sel = 3.0V
(CONAudio
VAUDIO = 3.0V
bus = 4.25V
Sel = 3.0V
VAUDIO = 3.0V
bus = 4.25V
VBias = 0.2V
f = 1MHz
V
9.0
A
Figure 23
D+/R, D-/L (Source Port)
On Capacitance
)
CON(D+/R, D-/L)
pF
VBias = 0.2V
f = 1MHz
V
A
10.0
Figure 23
)
USB Input Source
Off Capacitance
f = 1MHz
Figure 22
COFF(D+, D-)
V
A
1.5
3.0
pF
pF
Audio Input Source
Off Capacitance
f = 1MHz
Figure 22
COFF(R/L)
V
ASel =0V
© 2006 Fairchild Semiconductor Corporation
FSA221 Rev. 1.0.3
www.fairchildsemi.com
8
Typical Characteristics
Figure 6.
RON Audio, VAudio = 3.0V, VBUS = Float
0.1
1.0
10.0
100.0
1000.0
0
-20
-40
-60
-80
-100
-120
-140
Frequency (KHz)
CC(Vaudio) = 3.0V
V
Figure 7.
Non-Adjacent Channel Crosstalk – Audio
© 2006 Fairchild Semiconductor Corporation
FSA221 Rev. 1.0.3
www.fairchildsemi.com
9
Typical Characteristics (Continued)
0.1
1.0
10.0
100.0
1000.0
10000.0
0
-20
-40
-60
-80
-100
-120
-140
-160
Frequency (KHz)
CC(Vaudio) = 3.0V
V
Figure 8.
Off-Isolation – Audio
1
0
10
100
1000
10000
-1
-2
-3
-4
-5
-6
-7
-8
Frequency (MHz)
Figure #. Bandwidth Characterization, Frequency Response at CL= 0pF,VCC (Vbus)
= 4.25V
Figure 9.
Bandwidth, Gain vs. Frequency – USB
© 2006 Fairchild Semiconductor Corporation
FSA221 Rev. 1.0.3
www.fairchildsemi.com
10
Test Diagrams
VON
I (OFF)
A
Dn or R/L
D+/R or D-/L
V
D+/R or D-/L
sw
V
SW
D+, D-
or R/L
GND
ION
GND
GND
VCNTRL = fn (Vaudio and Vbus)
VCNTRL = fn (Vaudio and Vbus)
RON = VON / ION
Figure 10. On Resistance
Figure 11. Off Leakage
D+, D- or R,L
D+/R or D-/L
VOUT
C
D+, D- or R/L
R
IA(ON)
L
L
V
sw
R
S
GND
A
GND
D+/R or
D-/L
V
sw
VCNTRL = fn (Vaudio and Vbus)
GND
GND
RL , R and CL are function of application
S
VCNTRL = fn (Vaudio and Vbus)
environment (see AC Tables for specific values)
CL includes test fixture and stray capacitance
Figure 12. On Leakage
Figure 13. AC Test Circuit Load
tRISE = 1us
tFALL = 1 us
tRISE = 2.5ns
tFALL = 2.5ns
Vbus
3V
90%
Vth(min)
90%
50%
90%
50%
Vth(max)
Input - VCNTRL
10%
Input - VASel
GND
10%
90%
10%
10%
90%
GND
VOH
VOH
90%
90%
Output - VOUT
VOL
Output - VOUT
VOL
Vth = Vbusth or Vaudioth
tOFF
tON
tON
tOFF
VCNTRL = fn (Vaudio and Vbus)
Figure 15. Turn-On / Turn-Off Waveforms (USB/Audio)
Figure 14. Turn-On / Turn-Off
Waveforms (ASel
)
© 2006 Fairchild Semiconductor Corporation
FSA221 Rev. 1.0.3
www.fairchildsemi.com
11
Test Diagrams (Continued)
tRISE = 750ps
tFALL = 750ps
0.4V
90%
50%
90%
50%
Input – VD+/D-
10%
10%
50%
GND
VOH
Output - VOUT
VOL
50%
tpLH
tpHL
Figure 16. USB Switch Propagation Delay Waveforms
tRISE = 750ps
tFALL = 750ps
0.4V
90%
50%
90%
50%
Input – VD+/D-
10%
10%
50%
GND
VOH
Output - VOUT
VOL
50%
tpLH
tpHL
Figure 17. Pulse Skew: tSK(P) = | tPHL – tPLH
|
tRISE = 750ps
tFALL = 750ps
0.4V
90%
50%
90%
50%
Input – VD+/D-
10%
10%
GND
VOH
Output1 - VOUT
VOL
50%
50%
tpLH1
tpHL1
tsk(o)
VOH
Output2 - VOUT
VOL
50%
50%
tpLH2 tpHL2
Figure 18. Output Skew: tSK(O) = | tPLH1 – tPLH2 | or | tPHL1 – tPHL2
|
© 2006 Fairchild Semiconductor Corporation
FSA221 Rev. 1.0.3
www.fairchildsemi.com
12
Test Diagrams (Continued)
Network Analyzer
R
S
V
IN
V
GND
S
GND
V
VCNTRL
GND
OUT
GND
R
T
VCNTRL = fn (Vaudio and Vbus)
GND
RS and RT are function of application
environment (see AC Tables for specific values)
Figure 19. USB Bandwidth
Network Analyzer
R
S
V
IN
V
S
GND
R
T
GND
V
GND
CNTRL
V
OUT
GND
GND
R
T
VCNTRL = fn (Vaudio and Vbus)
RS and RT are function of application
GND
environment (see AC Tables for specific values)
OFF-Isolation = 20 Log (V
/ V
)
OUT
IN
Figure 20. Channel OFF Isolation
Network Analyzer
NC
R
S
V
IN
V
GND
S
V
GND
CNTRL
GND
R
T
GND
V
V
= fn (Vaudio and Vbus)
OUT
GND
CNTRL
R
T
RS and RT are function of application
environment (see AC Tables for specific values)
CROSSTALK = 20 Log (V
GND
/ V
)
IN
OUT
Figure 21. Non-Adjacent Channel-to-Channel Crosstalk
© 2006 Fairchild Semiconductor Corporation
FSA221 Rev. 1.0.3
www.fairchildsemi.com
13
Test Diagrams (Continued)
Dn or R/L or D+/R or D-/L
Capacitance
Meter
VCNTRL = fn (Vaudio and Vbus)
Dn or R/L or
D+/R or D-/L
F = 1MHz
Figure 22. Channel OFF Capacitance
Dn or R/L or
D+/R or D-/L
Capacitance
Meter
VCNTRL = fn (Vaudio and Vbus)
F = 1MHz
Dn or R/L or
D+/R or D-/L
Figure 23. Channel ON Capacitance
Audio Analyzer
R
S
V
IN
V
GND
S
GND
V
VCNTRL
GND
OUT
GND
R
T
VCNTRL = fn (Vaudio and Vbus)
GND
RS and RT are function of application
environment (see AC Tables for specific values)
Figure 24. Total Harmonic Distortion
© 2006 Fairchild Semiconductor Corporation
FSA221 Rev. 1.0.3
www.fairchildsemi.com
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Physical Dimensions
Dimensions are in millimeters unless otherwise noted.
Figure 25. 10-Lead MicroPak FSA221
© 2006 Fairchild Semiconductor Corporation
FSA221 Rev. 1.0.3
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Physical Dimensions
Dimensions are in millimeters unless otherwise noted.
Figure 26. 10-Lead MSOP FSA221 (Preliminary)
© 2006 Fairchild Semiconductor Corporation
FSA221 Rev. 1.0.3
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Physical Dimensions
Dimensions are in millimeters unless otherwise noted.
Figure 27. 10-Lead Quad Ultrathin FSA221 (Preliminary)
© 2006 Fairchild Semiconductor Corporation
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Rev. I21
© 2006 Fairchild Semiconductor Corporation
FSA221 Rev. 1.0.3
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