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參數資料
| 型號： | FSA201_0704 |
| 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： | 3/21頁 |
| 文件大小： | 1060K |
| 代理商： | FSA201_0704 |
2006 Fairchild Semiconductor Corporation
FSA201 Rev. 1.2.1
www.fairchildsemi.com
3
F
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
V
bus
V
audio
Switch Select
Control Circuitry
D+/R
D-/L
D+
R
D-
L
A
Sel
R
pd
GND
GND
5V
Audio
CODEC
FS-USB
Source
3.0V - 3.6V
USB
Mini-AB
Connector
V
bus
ID
Figure 4.
Application Diagram
相關PDF資料 |
PDF描述 |
|---|---|
| FSA201 | USB2.0 Full-Speed and Audio Switches with Negative Signal Capability |
| 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 |
相關代理商/技術參數 |
參數描述 |
|---|---|
| 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 |
| FSA203_ZAB3116B WAF | 制造商:Fairchild Semiconductor Corporation 功能描述: |
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