Harman Kardon AVR 171/230, Service Manual

Page: 79 / 174

1
ISL54220
High-Speed USB 2.0 (480Mbps) Multiplexer
ISL54220
The Intersil ISL54220 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
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 digital logic inputs are 1.8V logic compatible when
operated with a 2.7V to 3.6V supply. The ISL54220 has
an output enable pin to open all the switches.
The ISL54220 is available in 10 Ld 1.8mmx1.4mm
µTQFN, 10 Ld TDFN and 10 Ld MSOP packages. It
operates over a temperature range of -40 to +85°C.
Related Literature
• Technical Brief TB363 “Guidelines for Handling and
Processing Moisture Sensitive Surface Mount Devices
(SMDs)”
• Application Note AN1449 “ISL54220IRUEVAL1Z
Evaluation Board User’s Manual”
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 @ 240MHz . . . . . . . . . 4.2pF
• Low ON-Resistance @ VDD = 5.5V . . . . . . . 4.5
Ω
• Low ON-Resistance @ VDD = 3.3V . . . . . . . 6.0 Ω
• Single Supply Operation (V
DD
) . . . . . 2.7V to 5.5V
• Available in µTQFN, TDFN, and MSOP Packages
• Pb-Free (RoHS Compliant)
• Compliant with USB 2.0 Short Circuit and
Overvoltage Requirements Without Additional
External Components
Applications*
(see page 15)
• MP3 and other Personal Media Players
• Cellular/Mobile Phones
• PDA’s
• Digital Cameras and Camcorders
• USB Switching
Application Block Diagram USB 2.0 HS Eye Pattern With
Switches In The Signal Path
ISL54220
USB
TRANSCEIVER
HIGH-SPEED
US
B CON
N
ECTOR
D-
D+
SEL
GND
HSD1-
HSD1+
HSD2-
HSD2+
V
DD
OE
LOGIC
µCONTROLLER
USB
TRANSCEIVER
FULL-SPEED
VBUS
D-
D+
GND
OR
FULL-SPEED
HIGH_SPEED
OR
PORTABLE MEDIA DEVICE
VOL
T
AGE
SCALE
(0.1
V/D
IV)
TIME SCALE (0.2ns/DIV)
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, 2010. All Rights Reserved
All other trademarks mentioned are the property of their respective owners.
February 4, 2010
FN6819.1
Harman Kardon AVR 171 Service Manual
Page 79 of 174