1
FN6820.0
ISL54221
High-Speed USB 2.0 (480Mbps)
Multiplexer
The Intersil ISL54221 is a single supply dual 2:1 multiplexer
that can operate from a single 2.7V to 5.5V supply. It contains
two SPDT (Single Pole/Double Throw) switches configured as
a DPDT. The part was designed for switching or routing of
USB High-Speed signals and/or USB Full-speed signals in
portable battery powered products.
The 6.7
Ω switches can swing rail to rail and were specifically
designed to pass USB full-speed data signals that range from
0V to 3.3V and USB high-speed data signals that range from
0V to 400mV. They have high bandwidth and low capacitance
to pass USB high-speed data signals with minimal distortion.
The part can be used in Personal Media Players and other
portable battery powered devices that need to route USB
high-speed signals or full-speed signals to different
transceiver sections of the device while connected to a single
USB host (computer).
The digital logic inputs are 1.8V logic compatible when
operated with a 2.7V to 3.6V supply. The ISL54221 has an
output enable pin to open all the switches. It can be used to
facilitate proper bus disconnect and connection when
switching between the USB sources.
The ISL54221 is available in a tiny 10 Ld 2.1mmx1.6mm
TQFN package. It operates over a temperature range of
-40 to +85°C.
Features
High-Speed (480Mbps) and Full-Speed (12Mbps)
Signaling Capability per USB 2.0
1.8V Logic Compatible (2.7V to +3.6V supply)
Enable Pin to Open all Switches
Power OFF Protection
D-/D+ Pins Overvoltage Tolerant to 5.5V
-3dB Frequency . . . . . . . . . . . . . . . . . . . . . . . . . . 742MHz
Low ON Capacitance. . . . . . . . . . . . . . . . . . . . . . . . 7.4pF
Low ON-Resistance. . . . . . . . . . . . . . . . . . . . . . . . . . 6.7Ω
Single Supply Operation (VDD) . . . . . . . . . . . . 2.7V to 5.5V
Available in TQFN Package
Pb-Free (RoHS Compliant)
Compliant with USB 2.0 Short Circuit and Overvoltage
Requirements Without Additional External Components
Applications
MP3 and other Personal Media Players
Cellular/Mobile Phones
PDA’s
Digital Cameras and Camcorders
USB Switching
Application Block Diagram
PORTABLE MEDIA DEVICE
ISL54221
USB
TRANSCEIVER
HIGH-SPEED
U
S
B
CON
N
E
C
T
O
R
D-
D+
SEL
GND
HSD1-
HSD1+
HSD2-
HSD2+
VDD
OE
LOGIC CIRCUITRY
CONTROLLER
USB
TRANSCEIVER
FULL-SPEED
VBUS
D-
D+
GND
OR
FULL-SPEED
HIGH_SPEED
OR
Data Sheet
December 16, 2008
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-468-3774
| Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright Intersil Americas Inc. 2008. All Rights Reserved
All other trademarks mentioned are the property of their respective owners.