FSA221_12 Datasheet, PDF (1/17 Pages) Fairchild Semiconductor – USB2.0 High-Speed (480Mbps) and Audio Switches with Negative Signal Capability

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April 2012
FSA221 — USB2.0 High-Speed (480Mbps) and
Audio Switches with Negative Signal Capability
Features
 HS-USB: 4Ω Typical On Resistance
 HS-USB: 4.5pF Typical On Capacitance
 Audio: 3Ω Typical On Resistance
 -3db Bandwidth: > 720MHz
 Low Power Consumption
 Power-off Protection on Common D+/R, D-/L Ports
 Automatically Detects V_bus for Switch Path
Selection
Applications
 Cell Phone, PDA, Digital Camera, and Notebook
 LCD Monitor, TV, and Set-Top Box
Description
The FSA221 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, the FSA221 also incorporates
a V_bus detection capability. The FSA221 includes a
power-off feature to minimize current consumption when
V_bus is not present. This power-off circuitry is available
for the common D+/R, D-/L ports only. Typical
applications involve switching in portables and
consumer applications, such as cell phones, digital
cameras, and notebooks with hubs or controllers.
Ordering Information
Part Number
FSA221L10X
FSA221MUX
FSA221UMX
Package Number
MAC10A
MUA10A
UMLP10A
Top Mark
Package Description
GK
10-Lead MicroPak™, JEDEC MO-255, 1.6 x 2.1mm
FSA221 10-Lead MSOP JEDEC MO-187, 3.0 mm Wide
GL
10-Lead Quad, Ultrathin MLP, 1.4 x 1.8mm
V_bus
V_AUDIO
D+
R
D --
L
© 2006 Fairchild Semiconductor Corporation
FSA221 • Rev. 1.1.0
Switch Select
Control Circuitry
ASel
R_pd
GND
D+/R
D-/L
Figure 1. Analog Symbol
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