Intersil ISL54222A高速USB信号连接方案

Intersil 公司的ISL54222A是单电源双2:1复接器,工作电压1.8V-3.3V,包括有两个SDPT开关,可配置成DPDT,开关导通电阻5.7欧姆,-3dB带宽为780MHz,能通过0-3.3VUSB全速(12MHz)数据信号和0-400mV USB高速(480MHz)数据信号(单电源1.8V电压),广泛应用在MP3和其它手提媒体播放器,手机,PDA,数码相机和摄像机以及USB交换.本文介绍了ISL54222A主要特性和应用方框图,以及ISL54222AIRUEVAL1Z评估板主要特性和电路图.

The Intersil ISL54222A is a single supply dual 2:1 multiplexer that can operate from a single 1.8V to 3.3V supply. It contains two SPDT (Single Pole/Double Throw) switches configured as a DPDT. The part was designed for switching or routing of USB High-Speed signals and/or USB Full-speed signals in portable battery powered products.

The 5.7Ω switches can swing rail-to-rail and were specifically designed to pass USB full speed data signals that range from 0V to 3.3V and USB high speed data signals that range from 0V to 400mV with a single supply as low as 1.8V. They have high bandwidth and low capacitance to pass USB high speed data signals with minimal distortion.
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