ISL54211
®
Data Sheet
August 25, 2008
FN6662.1
MP3/USB 2.0 High Speed Switch with
Negative Signal Handling/Click and Pop
Suppression
Features
• High Speed (480Mbps) and Full Speed (12Mbps)
Signaling Capability per USB 2.0
The Intersil ISL54211 dual SPDT (Single Pole/Double Throw)
switches combine low distortion audio and accurate USB 2.0
high speed data (480Mbps) signal switching in the same low
voltage device. When operated with a 2.7V to 5.0V single
supply these analog switches allow audio signal swings
below-ground, allowing the use of a common USB and audio
headphone connector in Personal Media Players and other
portable battery powered devices.
• Low Distortion Negative Signal Capability
• Clickless/Popless Audio Switches
• Enable Control Pin (CTRL) to Open all Switches
• Low Distortion Headphone Audio Signals
- THD+N at 1mW into 32Ω Load . . . . . . . . . . . . . 0.014%
• Crosstalk (20Hz to 20kHz). . . . . . . . . . . . . . . . . . . -100dB
• OFF-Isolation (20Hz to 100kHz) . . . . . . . . . . . . . . . 95dB
The ISL54211 logic control pins are 1.8V compatible with a
supply voltage of 2.7V to 3.6V, which allows for control via a
standard µcontroller.
• Single Supply Operation (V ) . . . . . . . . . . . . 2.7V to 5.0V
DD
• -3dB Bandwidth USB Switch. . . . . . . . . . . . . . . . . 700MHz
• Available in µTQFN and TDFN Packages
The part has an audio enable control pin (CTRL) to open all
in-line switches and activate the audio click and pop circuitry.
The high OFF-isolation and special click/pop circuitry of the
audio switches eliminates click and pops in the head-phones
when the audio CODEC drivers are powering up or down or
when a headphone is inserted or removed from the
headphone jack.
• Compliant with USB 2.0 Short Circuit Requirements
Without Additional External Components
• Pb-Free (RoHS Compliant)
Applications
It’s available in a tiny 10 Ld 1.8mmx1.4mm ultra-thin µTQFN
package and a 10 Ld 3mmx3mm TDFN package. It operates
over a temperature range of -40 to +85°C.
• MP3 and other Personal Media Players
• Cellular/Mobile Phones
• PDA’s
Related Literature
• Technical Brief TB363 “Guidelines for Handling and
Processing Moisture Sensitive Surface Mount Devices
(SMDs)”
• Audio/USB Switching
Application Block Diagram
µCONTROLLER
3.3V
VDD
ISL54211
IN
CTRL
4MΩ
LOGIC CONTROL
4MΩ
V
BUS
USB HIGH-SPEED
TRANSCEIVER
D-
COM -
D+
200kΩ
COM +
200kΩ
R
L
CLICK
AND
POP
CODEC
AUDIO
GND
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1
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