參數(shù)資料
型號(hào)： 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(fù)信號(hào)音頻開(kāi)關(guān)
文件頁(yè)數(shù)： 3/19頁(yè)
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(guān)PDF資料
PDF描述
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(guān)代理商/技術(shù)參數(shù)
參數(shù)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(kāi)關(guān) IC USB 2.0 and Audio DPDT Multiplexer RoHS:否 制造商:Texas Instruments 開(kāi)關(guān)數(shù)量:2 開(kāi)關(guān)配置:SPDT 開(kāi)啟電阻（最大值）:0.1 Ohms 切換電壓（最大）: 開(kāi)啟時(shí)間（最大值）: 關(guān)閉時(shí)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(fēng)格:SMD/SMT 封裝 / 箱體:DSBGA-16
FSA201MUX 功能描述:模擬開(kāi)關(guān) IC FSA201 USB 2.0 Audio Switches RoHS:否 制造商:Texas Instruments 開(kāi)關(guān)數(shù)量:2 開(kāi)關(guān)配置:SPDT 開(kāi)啟電阻（最大值）:0.1 Ohms 切換電壓（最大）: 開(kāi)啟時(shí)間（最大值）: 關(guān)閉時(shí)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(fēng)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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