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ISL54224IRUEVAL1Z

更新时间： 2024-09-30 05:39:39
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英特矽尔 - INTERSIL 复用器
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18页 801K
描述
High-Speed USB 2.0 (480Mbps) Multiplexer with Overvoltage Protection (OVP) and Overvoltage Indicator Output

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ISL54224IRUEVAL1Z 数据手册

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High-Speed USB 2.0 (480Mbps) Multiplexer with  
Overvoltage Protection (OVP) and Overvoltage  
Indicator Output  
ISL54224  
Features  
• High-Speed (480Mbps) and Full-Speed (12Mbps)  
Signaling Capability per USB 2.0  
• 1.8V Logic Compatible (2.7V to +3.6V supply)  
• OE/ALM Pin to Open all Switches and Indicate  
Overvoltage Fault Condition  
• Power OFF Protection  
The Intersil ISL54224 is a single supply dual 2:1  
multiplexer that can operate from a single 2.7V to 5.25V  
supply. It contains two SPDT (Single Pole/Double  
Throw) switches configured as a DPDT. The part was  
designed for switching of USB data signals in portable  
battery powered products.  
The 6.5Ω switches were specifically designed to pass  
USB high speed/full speed data signals. They have high  
bandwidth and low capacitance to pass USB high speed  
data signals with minimal distortion.  
• D-/D+ Pins Overvoltage Protection for +5.25V and  
-5V Fault Voltages  
• -3dB Frequency . . . . . . . . . . . . . . . . . . 780MHz  
• Low ON Capacitance @ 240MHz. . . . . . . . . 3.3pF  
• Low ON-Resistance. . . . . . . . . . . . . . . . . . 6.5Ω  
The ISL54224 has OVP circuitry on the D-/D+ com pins  
that opens the USB in-line switches when the voltage at  
these pins exceeds 3.8V (typ) or goes negative by -0.5V  
(typ). It isolates fault voltages up to +5.25V or down to  
-5V from getting passed to the other-side of the switch,  
thereby protecting the USB transceivers.  
• Single Supply Operation (V ) . . . . 2.7V to 5.25V  
DD  
• Available in µTQFN and TDFN Packages  
• Pb-Free (RoHS Compliant)  
• Compliant with USB 2.0 Short Circuit and  
Overvoltage Requirements Without Additional  
External Components  
The digital logic inputs are 1.8V logic compatible when  
operated with a 2.7V to 3.6V supply. The ISL54224 has  
an open drain OE/ALM pin that can be driven Low to  
open all switches and outputs a Low when the OVP  
circuitry is activated. It can be used to facilitate proper  
bus disconnect and connection when switching between  
the USB sources.  
Applications*(see page 16)  
• MP3 and other Personal Media Players  
• Cellular/Mobile Phones  
• PDA’s  
• Digital Cameras and Camcorders  
• USB Switching  
The ISL54224 is available in 10 Ld 1.8mmx1.4mm  
µTQFN and 10 Ld TDFN packages. It operates over a  
temperature range of -40 to +85°C.  
Related Literature*(see page 16)  
• See AN1571 “ISL54224IRTZEVAL1Z Evaluation  
Board User's Manual”  
Typical Application  
USB 2.0 HS Eye Pattern With  
Switches in the Signal Path  
3.3V  
3.3V  
500Ω  
100kΩ  
VDD  
OE/ALM  
LOGIC  
CONTROL  
SEL  
µP  
VBUS  
D-  
HSD1-  
USB  
D-  
TRANSCEIVER  
HSD1+  
OVP  
HSD2-  
D+  
D+  
USB  
TRANSCEIVER  
HSD2+  
ISL54224  
GND  
GND  
TIME SCALE (0.2ns/DIV)  
June 7, 2010  
FN6969.0  
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.  
1
1-888-INTERSIL or 1-888-468-3774 | Intersil (and design) is a registered trademark of Intersil Americas Inc.  
Copyright Intersil Americas Inc. 2010. All Rights Reserved  
All other trademarks mentioned are the property of their respective owners.  
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