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FSA221

USB2.0 High-Speed (480Mbps) and Audio Switches with Negative Signal Capability

Fairchild Semiconductor 

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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 Vbus 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 Vbus detection capability. The FSA221 includes a

power-off feature to minimize current consumption when

Vbus 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

Vbus

VAUDIO

D+

R

D --

L

© 2006 Fairchild Semiconductor Corporation

FSA221 • Rev. 1.1.0

Switch Select

Control Circuitry

ASel

Rpd

GND

D+/R

D-/L

Figure 1. Analog Symbol

www.fairchildsemi.com

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