ISL54400 Datasheet, PDF (1/15 Pages) Intersil Corporation – Low Voltage, Dual SPDT, USB/Audio Switches with Negative Signal Capability

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Data Sheet
ISL54400, ISL54401, ISL54402
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
µTQFN packages. They operate over a temperature range of
-40 to +85°C.
Related Literature
• Application Note AN1255 “ISL5440XEVAL1Z Evaluation
Board User’s Manual”
• Technical Brief TB363 “Guidelines for Handling and
Processing Moisture Sensitive Surface Mount Devices
(SMDs)”
• Application Note AN557 “Recommended Test Procedures
for Analog Switches”
Application Block Diagram
V_BUS
V_DD
ISL54400
D-/L
D+/R
Features
• Low Distortion Negative Signal Capability
• Detection of V_BUS Voltage on USB Cable (ISL54400 and
ISL54401)
• Generation of V_TERM Voltage for USB D+/D- Pull-up
Resistor (ISL54400)
• Low Distortion Headphone Audio Signals
- THD+N at 12mW into 32Ω Load . . . . . . . . . . . <0.007%
• Cross-talk (20Hz to 20kHz) . . . . . . . . . . . . . . . . . . -110dB
• 1.8V Logic Compatible (ISL54402)
• Single Supply Operation (V_DD)
- ISL54400 and ISL54401 . . . . . . . . . . . . . . 2.5V to 3.6V
- ISL54402 . . . . . . . . . . . . . . . . . . . . . . . . . . 1.8V to 5.5V
• Available in Ultra-thin µQFN and TDFN Packages
• Pb-Free Plus Anneal Available (RoHS Compliant)
Applications
• MP3 and other Personal Media Players
• Cellular/Mobile Phones
• PDA’s
• USB Switching
• Audio/USB Switching
V_TERM
D-
D+
L
R
USB
FULL-SPEED
TRANSCEIVER
CODEC
GND
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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Copyright Intersil Americas Inc. 2006. All Rights Reserved
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