ISL54205B Datasheet, PDF (1/16 Pages) Intersil Corporation – MP3/USB 2.0 High Speed Switch with Negative Signal Handling

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Data Sheet
September 25, 2007
ISL54205B
FN6557.0
MP3/USB 2.0 High Speed Switch with
Negative Signal Handling
The Intersil ISL54205B 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 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 ISL54205B incorporates circuitry for detection of the USB
V_BUS voltage, which is used to switch between the audio and
USB signal sources in the portable device. The part has a
control pin to open all the switches and put the part in a low
power down state.
The ISL54205B is available in a small 10 Ld 2.1mmx1.6mm
ultra-thin µTQFN package and a 10Ld 3mmx3mm TDFN
package. It operates over a temperature range of -40 to
+85°C.
Related Literature
• Application Note AN1280 “ISL54205EVAL1Z 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
22kΩ
COM -
V_DD
ISL54205B
LOGIC CIRCUITRY
4MΩ
4MΩ
Features
• High Speed (480Mbps) and Full Speed (12Mbps)
Signaling Capability per USB 2.0
• Low Distortion Negative Signal Capability
• Detection of V_BUS Voltage on USB Cable
• Control Pin to Open all Switches and Enter Low Power
State
• Low Distortion Headphone Audio Signals
- THD+N at 20mW into 32Ω Load . . . . . . . . . . . . . <0.1%
• Cross-talk (20Hz to 20kHz) . . . . . . . . . . . . . . . . . . -110dB
• Single Supply Operation (V_DD) . . . . . . . . . . . . 2.7V to 3.6V
• -3dB Bandwidth USB Switch . . . . . . . . . . . . . . . . . 630MHz
• Available in µTQFN and TDFN Packages
• Pb-Free (RoHS Compliant)
• Compliant with USB 2.0 Short Circuit Requirements
Without Additional External Components
Applications
• MP3 and Other Personal Media Players
• Cellular/Mobile Phones
• PDA’s
• Audio/USB Switching
CTRL
D-
D+
µCONTROLLER
USB
HIGH-SPEED
TRANSCEIVER
COM +
50kΩ L
R
50kΩ
CODEC
GND
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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