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FSA321 Datasheet, PDF (1/2 Pages) Fairchild Semiconductor – USB2.0 Hi-Speed (480Mbps) and Audio Switches with Negative Signal Capability and Built-in Termination on Unselected Audio Paths | |||
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September 2009
FSA321 â USB2.0 Hi-Speed (480Mbps) and Audio
Switches with Negative Signal Capability and Built-in
Termination on Unselected Audio Paths
Features
 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
 Flow-Through Pin Out Eliminates PCB Vias
 Built-In Termination on Unselected Audio Paths to
Inhibit Audio Pop
Applications
 MP3, Cell Phone, PDA, Digital Camera, and
Notebook
 LCD Monitor, TV, and Set-Top Box
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.
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.
Typical applications involve switching in portables and
consumer applications, such as cell phones, digital
cameras, and notebooks with hubs or controllers.
IMPORTANT NOTE:
For additional performance information, please contact
analogswitch@fairchildsemi.com.
Ordering Information
Part Number Package Number Top Mark
FSA321UMX
MLP010A
GL
Eco Status
Package Description
Green
10-Lead Quad, Ultrathin MLP, 1.4 x 1.8mm
For Fairchildâs definition of Eco Status, please visit: http://www.fairchildsemi.com/company/green/rohs_green.html.
VCC
A/LP Sel
Rpd
Control
Block
USB Sel
Rpd
D+
R
RT
D-
L
RT
D+/R
D-/L
Figure 1. FSA321 Analog Symbol
© 2007 Fairchild Semiconductor Corporation
FSA321 ⢠Rev 1.0.4
www.fairchildsemi.com
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