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參數(shù)資料
| 型號： | FSA201MUX |
| 廠商： | Fairchild Semiconductor |
| 文件頁數(shù)： | 13/19頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC MULTIPLEXER DUAL DPDT 10MSOP |
| 標準包裝： | 1 |
| 功能： | 多路復用器 |
| 電路： | 2 x DPDT |
| 導通狀態(tài)電阻： | 6 歐姆 |
| 電壓電源： | 單/雙電源 |
| 電壓 - 電源，單路/雙路(±)： | 2.7 V ~ 3.6 V，±4.5 V ~ 5.5 V |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 10-TFSOP，10-MSOP（0.118"，3.00mm 寬） |
| 供應商設(shè)備封裝： | 10-MSOP |
| 包裝： | 標準包裝 |
| 產(chǎn)品目錄頁面： | 1218 (CN2011-ZH PDF) |
| 其它名稱： | FSA201MUXDKR |
2006 Fairchild Semiconductor Corporation
www.fairchildsemi.com
FSA201 Rev. 1.2.2
3
FSA201
USB2.0
Full-Speed
and
Audio
Swit
ches
with
Negative
Signal
Capability
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
VBUS-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 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 FSA201 VBUS 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 ASEL pin.
The FSA201 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 (see the Application Diagram).
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
FS-USB
Source
3.0V - 3.6V
USB
Mini-AB
Connector
V
bus
ID
Figure 4.
Application Diagram
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