ISL54210_14 Datasheet, PDF (1/21 Pages) Intersil Corporation – MP3/USB 2.0 High Speed Switch with Negative Signal Handling/Click and Pop Suppression

MP3/USB 2.0 High Speed Switch with Negative
Signal Handling/Click and Pop Suppression
ISL54210
Features
The Intersil ISL54210 dual SPDT (Single Pole/Double
Throw) switch combines 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 ISL54210 incorporates circuitry for the detection of
the USB V_BUS voltage, which is used to switch between
the audio and USB signal sources.
It has an enable pin (CTRL) to open all switches and
activate the audio click/pop (C/P) circuitry. The high
off-isolation and special C/P circuitry of the audio
switches eliminates click and pops in the head-phones
when the audio CODEC drivers are powering up/down
or when a headphone is inserted or removed from the
jack.
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°C to +85°C.
Related Literature (see page 19)
• Technical Brief TB363 “Guidelines for Handling and
Processing Moisture Sensitive Surface Mount Devices
(SMDs)”
• Application Note AN1407 “ISL54210EVAL1Z
Evaluation Board User’s Manual”
• High Speed (480Mbps) and Full Speed (12Mbps)
Signaling Capability per USB 2.0
• Detection of V_BUS Voltage on USB Cable
• Low Distortion Negative Signal Capability
• Clickless/Popless Audio Switches
• Enable Pin 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
• Single Supply Operation (V_DD) . . . . . . 2.7V to 3.6V
• -3dB Bandwidth USB Switch . . . . . . . . . . . . 700MHz
• Low ON Capacitance @ 240MHz. . . . . . . . . . . 4.2pF
• Available in µTQFN and TDFN Packages
• Compliant with USB 2.0 Short Circuit Requirements
Without Additional External Components
• Pb-Free (RoHS Compliant)
Applications* (see page 19)
• MP3 and other Personal Media Players
• Cellular/Mobile Phones
• PDA’s
• Audio/USB Switching
Application Block Diagram
V_BUS
3.3V
V_BUS
V_DD
ISL54210
LOGIC CONTROL
4MΩ
CTRL
4MΩ
D-
COM -
200kΩ
D+
COM +
200kΩ
CLICK
R
AND
L
POP
GND
µCONTROLLER
USB HIGH-SPEED
TRANSCEIVER
AUDIO CODEC
March 18, 2010
FN6661.2
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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