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參數資料
| 型號： | FSA201 |
| 廠商： | Fairchild Semiconductor Corporation |
| 英文描述： | USB2.0 Full-Speed and Audio Switches with Negative Signal Capability |
| 中文描述： | USB2.0全速和能力負信號音頻開關 |
| 文件頁數： | 3/19頁 |
| 文件大小： | 283K |
| 代理商： | FSA201 |
PRELIMINARY
2006 Fairchild Semiconductor Corporation
FSA201 Rev. 1.1.2
www.fairchildsemi.com
3
Functional Description
The FSA201 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 full-speed USB signals and includes an automatic
V
bus
-detection circuit. When a USB connector, rather
than a headphone, is connected to the ultra-portable
device the switch is automatically configured for full-
speed USB data transfer. If no V
bus
is detected, and yet
V
AUDIO
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.
For those applications where the V
bus
is generated as a
self-powered device or where V
bus
is not removed, the
A
Sel
pin provides the ability to switch, under software
control, to the audio path. The A
Sel
pin is internally
terminated by a resistor to GND (typical value 3M
Ω
) and
requires no connection for the standard ultra-portable
(cell-phone, MP3, or Portable Media Player). In an
application where the supply to the FSA201 V
bus
pin is
not guaranteed to be removed, a GPIO pin can be used
to switch out of full-speed USB mode into audio mode,
using the A
Sel
pin.
The FSA201 V
bus
pin must be connected directly to V
bus
or a supply > 3.8V, not an LDO regulated down to 3.6V
or a V
bat
-generated supply that may fall below 3.8V in
normal operation (see the Application Diagram).
Application Diagram
Vbus
Vaudio
Control Circuitry
D+/R
D-/L
D+
R
D-
L
ASel
R
pd
GND
FSA201
GND
5V
CODEC
Source
2.7V – 4.3V
Connector
Vbus
ID
Switch Select
Audio
FS - USB
USB
Mini-AB
Figure 4.
Application Diagram
相關PDF資料 |
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|---|---|
| FSA201L10X | USB2.0 Full-Speed and Audio Switches with Negative Signal Capability |
| FSA201MUX | USB2.0 Full-Speed and Audio Switches with Negative Signal Capability |
| FSA203 | Multimedia High-Speed USB, Video, and Negative Swing Audio Switch with Video Amp/Filter |
| FSA203BQX | Multimedia High-Speed USB, Video, and Negative Swing Audio Switch with Video Amp/Filter |
| FSA203MTCX | Multimedia High-Speed USB, Video, and Negative Swing Audio Switch with Video Amp/Filter |
相關代理商/技術參數 |
參數描述 |
|---|---|
| FSA201_0704 | 制造商:FAIRCHILD 制造商全稱:Fairchild Semiconductor 功能描述:USB2.0 Full-Speed and Audio Switches with Negative Signal Capability |
| FSA201L10X | 功能描述:模擬開關 IC USB 2.0 and Audio DPDT Multiplexer RoHS:否 制造商:Texas Instruments 開關數量:2 開關配置:SPDT 開啟電阻（最大值）:0.1 Ohms 切換電壓（最大）: 開啟時間（最大值）: 關閉時間（最大值）: 工作電源電壓:2.7 V to 4.5 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:DSBGA-16 |
| FSA201MUX | 功能描述:模擬開關 IC FSA201 USB 2.0 Audio Switches RoHS:否 制造商:Texas Instruments 開關數量:2 開關配置:SPDT 開啟電阻（最大值）:0.1 Ohms 切換電壓（最大）: 開啟時間（最大值）: 關閉時間（最大值）: 工作電源電壓:2.7 V to 4.5 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:DSBGA-16 |
| FSA203 | 制造商:FAIRCHILD 制造商全稱:Fairchild Semiconductor 功能描述:Multimedia High-Speed USB, Video, and Negative Swing Audio Switch with Video Amp/Filter |
| FSA203_07 | 制造商:FAIRCHILD 制造商全稱:Fairchild Semiconductor 功能描述:Multimedia High-Speed USB, Video, and Negative Swing Audio Switch with Video Amp/Filter |
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