FSA321 [FAIRCHILD]
USB2.0 Hi-Speed (480Mbps) and Audio Switches with Negative Signal Capability and Built-in Termination on Unselected Audio Paths; USB2.0高速传输（480Mbps ）和音频开关，可处理负信号功能，并内置终端上未选音频路径
| 型号： | FSA321 |
| 厂家： | 
FAIRCHILD SEMICONDUCTOR |
| 描述： | USB2.0 Hi-Speed (480Mbps) and Audio Switches with Negative Signal Capability and Built-in Termination on Unselected Audio Paths |
| 文件： | 总2页 (文件大小：440K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
September 2009
FSA321 — USB2.0 Hi-Speed (480Mbps) and Audio
Switches with Negative Signal Capability and Built-in
Termination on Unselected Audio Paths
Features
Description
The FSA321 is a Double-Pole, Double Throw (DPDT)
multiplexer that combines a low-distortion audio and a
USB2.0 High-Speed (HS) switch path. This configuration
enables audio and USB data to share a common
connector port. The architecture is designed to allow
audio signals to swing below ground. This means a
common USB and headphone jack can be used for
personal media players and portable peripheral devices.
Audio: 1.8Ω Typical On Resistance
HS-USB: 8Ω Typical On Resistance
HS-USB: 5pF Typical On Capacitance
USB Path -3db Bandwidth: > 720MHz
Negative Swing Capable Audio Channel
Power-off Protection on Common D+/R, D-/L Ports
Automatic USB Detection (Configurable)
Power-Off Protection on all I/O Ports
OVT on all I/O Ports
Since USB2.0 is an industry standard for shared data-
path in portable devices, FSA321 can be configured for
automatic VBUS detection. The FSA321 includes a
power-off feature as well as over-voltage tolerance to
minimize current consumption when VSW exceeds VCC
.
Flow-Through Pin Out Eliminates PCB Vias
Typical applications involve switching in portables and
consumer applications, such as cell phones, digital
cameras, and notebooks with hubs or controllers.
Built-In Termination on Unselected Audio Paths to
Inhibit Audio Pop
Applications
IMPORTANT NOTE:
For additional performance information, please contact
analogswitch@fairchildsemi.com.
MP3, Cell Phone, PDA, Digital Camera, and
Notebook
LCD Monitor, TV, and Set-Top Box
Ordering Information
Part Number Package Number Top Mark
Package Description
Eco Status
FSA321UMX
MLP010A
GL
Green
10-Lead Quad, Ultrathin MLP, 1.4 x 1.8mm
For Fairchild’s definition of Eco Status, please visit: http://www.fairchildsemi.com/company/green/rohs_green.html.
VCC
USB Sel
A/LP Sel
Control
Block
Rpd
Rpd
D+
R
D+/R
RT
D-
L
D-/L
RT
Figure 1. FSA321 Analog Symbol
© 2007 Fairchild Semiconductor Corporation
FSA321 • Rev 1.0.4
www.fairchildsemi.com
© 2007 Fairchild Semiconductor Corporation
FSA321 • Rev.1.0.4
www.fairchildsemi.com
12
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