参数资料
| 型号： | FSA221UMX |
| 厂商： | Fairchild Semiconductor |
| 文件页数： | 4/10页 |
| 文件大小： | 0K |
| 描述： | IC SWITCH AUD USB DPDT 10-MLP |
| 标准包装： | 1 |
| 类型： | USB 控制器 |
| 应用： | 相机，移动电话，监控器，机顶盒 |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 10-UFQFN |
| 供应商设备封装： | 10-uMLP（1.4x1.8） |
| 包装： | 标准包装 |
| 其它名称： | FSA221UMXDKR |
2006 Fairchild Semiconductor Corporation
www.fairchildsemi.com
FSA221
Rev. 1.1.0
3
FS
A2
2
1
—
US
B2
.0
High
-Spe
ed
and
Audio
Swi
tches
wi
th
Nega
ti
ve
Signal
Ca
pab
il
it
y
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.
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
control, to the audio path. The ASel pin is internally
terminated by a resistor to GND (typical value 3M
) 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.
Application Diagram
V
bus
V
audio
Switch Select
Control Circuitry
D+/R
D-/L
D+
R
D-
L
A
Sel
Rpd
GND
5V
Audio
CODEC
3.0V - 3.6V
USB
Mini -AB
Connector
V
bus
ID
USB 2.0
Source
Figure 5.
Typical Application
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相关代理商/技术参数 |
参数描述 |
|---|---|
| FSA223 | 制造商:FAIRCHILD 制造商全称:Fairchild Semiconductor 功能描述:USB2.0 High-Speed (480Mbps) and Audio Switches with Negative Signal Capability |
| FSA223_08 | 制造商:FAIRCHILD 制造商全称:Fairchild Semiconductor 功能描述:USB2.0 High-Speed (480Mbps) and Audio Switches with Negative Signal Capability |
| FSA223_12 | 制造商:FAIRCHILD 制造商全称:Fairchild Semiconductor 功能描述:USB2.0 High-Speed (480Mbps) and Audio Switches with Negative Signal Capability |
| FSA223L10X | 功能描述:模拟开关 IC USB 2.0 Hi-Speed and Audio RoHS:否 制造商:Texas Instruments 开关数量:2 开关配置:SPDT 开启电阻（最大值）:0.1 Ohms 切换电压（最大）: 开启时间（最大值）: 关闭时间（最大值）: 工作电源电压:2.7 V to 4.5 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:DSBGA-16 |
| FSA223MUX | 功能描述:模拟开关 IC USB2.0 High Speed Audio RoHS:否 制造商:Texas Instruments 开关数量:2 开关配置:SPDT 开启电阻（最大值）:0.1 Ohms 切换电压（最大）: 开启时间（最大值）: 关闭时间（最大值）: 工作电源电压:2.7 V to 4.5 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:DSBGA-16 |
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