FSA801 Datasheet, PDF (1/12 Pages) Fairchild Semiconductor – USB2.0 High-Speed (480 Mbps), UART, and Audio Switch with Negative Signal Capability

November 2012
FSA801 — USB2.0 High-Speed (480 Mbps), UART, and
Audio Switch with Negative Signal Capability
Features
 3:1 Switch Handles:
- Audio Headsets
- UART
- Up to Two High- and Low-Speed USB Data
 USB Charger Detection and Indication, Compliant
with USB Battery Charging Specification, Rev 1.1
- Supports Data Contact Detect (DCD)
 Negative-Swing-Capable Audio Channel
 Built-in Termination Resistors for Audio Pop
Reduction
 Simple Switch Control Using Three Select Pins
 28 V Over-Voltage Tolerance on V_BUS
Applications
 Cell Phones, MP3 Players, PDAs
Description
The FSA801 is a 3:1 USB accessory switch that enables
USB data, stereo and mono audio, microphone, and
UART data to share a common connector port. Two
ports are designed for high-speed USB 2.0 signaling,
while also capable of full-speed USB and UART
communication. The architecture allows audio signals to
swing below ground so a common USB and headphone
jack can be used for personal media players and
portable peripheral devices.
FSA801 detects wall chargers through a dedicated pin
that provides the baseband with charger detection. The
charger function is compliant with USB Battery Charging
Specification, Rev 1.1, implementing Data Contact Detect
(DCD) before detecting a charger. The FSA801 indicates
if a Dedicated Charging Port (DCP) or a Charging
Downstream Port (CDP) has been connected.
The FSA801 meets both USB Rev. 2.0 and micro-USB
specifications.
Ordering Information
Part Number
FSA801UMX
Operating
Temperature Range
-40 to +85°C
Top Mark
Package
KL
16-Lead Quad, 1.8 x 2.6 mm Ultrathin Molded
Leadless Package (UMLP)
© 2010 Fairchild Semiconductor Corporation
FSA801 • Rev.1.0.3
Figure 1. Typical Application
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