廬
ISL54208
Data Sheet
December 18, 2006
FN6410.0
Low Voltage, Dual SPDT, USB/CVBS/
Audio Switches, with Negative Signal
Capability
The Intersil ISL54208 dual SPDT (Single Pole/Double
Throw) switches combine low distortion audio/video and
accurate USB 2.0 high speed (480Mbps) data signal
switching in the same low voltage device. When operated
with a 2.7V to 3.6V single supply these analog switches
allow audio/video signal swings below-ground, allowing the
use of a common USB and audio/video connector in digital
cameras, camcorders and other portable battery powered
Personal Media Player devices.
The ISL54208 logic control pins are 1.8V logic compatible
which allows control via a standard
渭controller.
With a VDD
voltage in the range of 2.7V to 3.6V the IN pin voltage can
exceed the VDD rail allowing for the USB 5V VBUS voltage
from a computer to directly drive the IN pin to switch
between the audio/video and USB signal sources in the
portable device. The part has an enable control pin to open
all the switches and put the part in a low power state.
The ISL54208 is available in a small 10 Ld 2.1mmx1.6mm
ultra-thin
渭TQFN
package and a 10 Ld 3mmx3mm TDFN
package. It operates over a temperature range of -40 to
+85擄C.
Features
鈥?High Speed (480Mbps) Signaling Capability per USB 2.0
鈥?Low Distortion Negative Signal Capability
鈥?Control Pin to Open all Switches and Enter Low Power
State
鈥?Low Distortion Mono Audio Signal
- THD+N at 20mW into 32惟 Load . . . . . . . . . . . . . <0.1%
鈥?Low Distortion Color Video Signal
- Differential Gain . . . . . . . . . . . . . . . . . . . . . . . . . . 0.28%
- Differential Phase. . . . . . . . . . . . . . . . . . . . . . . . . . 0.04擄
鈥?Cross-talk NCx Channels (4MHz) . . . . . . . . . . . . . . -78dB
鈥?Single Supply Operation (V
DD
) . . . . . . . . . . . . 1.8V to 5.5V
鈥?-3dB Bandwidth USB NOx Switches . . . . . . . . . . . 630MHz
鈥?Available in
渭
TQFN and TDFN Packages
鈥?Pb-Free Plus Anneal (RoHS Compliant)
鈥?Compliant with USB 2.0 Short Circuit Requirements
Without Additional External Components
Applications
鈥?Digital Camera and Camcorders
鈥?Video MP3 and other Personal Media Players
Related Literature
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>
鈥?Cellular/Mobile Phones
鈥?PDA鈥檚
鈥?Audio/Video/USB Switching
Application Block Diagram
VDD
IN
USB AND AUDIO/VIDEO JACK
VBUS
ISL54208
CTRL
LOGIC CIRCUITRY
渭
CONTROLLER
4M惟
NO1
COM1
D-
D+
NO2
50k惟
NC1
NC2
USB
HIGH-SPEED
TRANSCEIVER
COM2
NTSC or PAL
VIDEO
50k惟
AUDIO
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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