Datasheet

March 2013
© 2006 Fairchild Semiconductor Corporation www.fairchildsemi.com
FSA221 • Rev. 1.1.0
FSA221 — USB2.0 High-Speed and Audio Switches with Negative Signal Capability
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
Package Number
Top Mark
Package Description
FSA221L10X
MAC10A
GK
10-Lead MicroPak™, JEDEC MO-255, 1.6 x 2.1mm
FSA221MUX
MUA10A
FSA221
10-Lead MSOP JEDEC MO-187, 3.0 mm Wide
FSA221UMX
UMLP10A
GL
10-Lead Quad, Ultrathin MLP, 1.4 x 1.8mm
Figure 1. Analog Symbol
V
bus
V
AUDIO
S
w
i
t
c
h
S
e
l
e
c
t
C
o
n
t
r
o
l
C
i
r
c
u
i
t
r
y
D
+
/R
D
-
/L
D+
-
A
S
e
l
R
p
d
G
N
D
D+
R
D
-
L