廬
ISL54400, ISL54401, ISL54402
Data Sheet
July 12, 2006
FN6240.3
Low Voltage, Dual SPDT, USB/Audio
Switches with Negative Signal Capability
The Intersil ISL54400, ISL54401, ISL54402 dual SPDT
(Single Pole/Double Throw) switches combine low distortion
audio and accurate USB 2.0 full speed data signal switching
in the same low voltage device. When operated with a 2.5V to
3.6V 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.
The ISL54400 and ISL54401 incorporate circuitry for
detection of the USB V
BUS
voltage, which is used to switch
between the audio and USB signal source in the portable
device. In addition, the ISL54400 includes circuitry for
generation of a V
TERM
voltage of 3.3V for use with USB
speed setting pull-up resistor.
The ISL54400, ISL54401, ISL54402 are available in 10 Ld
3mm x 3mm TDFN and 10 Ld tiny 2.1mm x 1.6mm ultra-thin
碌
TQFN packages. They operate over a temperature range of
-40 to +85擄C.
Features
鈥?Low Distortion Negative Signal Capability
鈥?Detection of V
BUS
Voltage on USB Cable (ISL54400 and
ISL54401)
鈥?Generation of V
TERM
Voltage for USB D+/D- Pull-up
Resistor (ISL54400)
鈥?Low Distortion Headphone Audio Signals
- THD+N at 12mW into 32鈩?Load . . . . . . . . . . . <0.007%
鈥?Cross-talk (20Hz to 20kHz) . . . . . . . . . . . . . . . . . . -110dB
鈥?1.8V Logic Compatible (ISL54402)
鈥?Single Supply Operation (V
DD
)
- ISL54400 and ISL54401 . . . . . . . . . . . . . . 2.5V to 3.6V
- ISL54402 . . . . . . . . . . . . . . . . . . . . . . . . . . 1.8V to 5.5V
鈥?Available in Ultra-thin
碌
QFN and TDFN Packages
鈥?Pb-Free Plus Anneal Available (RoHS Compliant)
Applications
鈥?MP3 and other Personal Media Players
鈥?Cellular/Mobile Phones
鈥?PDA鈥檚
鈥?USB Switching
鈥?Audio/USB Switching
Related Literature
鈥?Application Note AN1255 鈥淚SL5440XEVAL1Z Evaluation
Board User鈥檚 Manual鈥?/div>
鈥?Technical Brief TB363 鈥淕uidelines for Handling and
Processing Moisture Sensitive Surface Mount Devices
(SMDs)鈥?/div>
鈥?Application Note AN557 鈥淩ecommended Test Procedures
for Analog Switches鈥?/div>
Application Block Diagram
V
DD
V
TERM
ISL54400
USB/HEADPHONE JACK
V
BUS
USB
FULL-SPEED
TRANSCEIVER
D-
D-/L
D+
L
R
D+/R
CODEC
GND
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-468-3774
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Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright Intersil Americas Inc. 2006. All Rights Reserved
All other trademarks mentioned are the property of their respective owners.
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