Toshiba's ultra-high-speed USB 2.0 bus switch

Toshiba Electronics Europe (TEE) has expanded its family of ultra-high-speed, efficient CMOS interface ICs with a miniature, low-power CMOS switch IC for use in USB 2.0 applications. The TC7USB221 is a USB 2.0 dual single pole double throw (SPDT) bus switch with low ON resistance and low pin capacitance, making it ideal for Hi-Speed USB operation with data rates up to 480Mbps. A typical application for the IC would be a multiplexer/demultiplexer function between two USB controllers.

Toshiba’s new switch operates within a voltage of 2.3V and 3.6V, has a typical ON resistance (RON) of just 6.5Ω and a low typical switch on capacitance (CON) of 7pF. This results in a typical 3db bandwidth of 720MHz and 820MHz for the TSSOP and WLCSP package, respectively. Additionally, a maximum quiescent current of just 2µA (@3.6V) helps designers to reduce system power consumption. Switching between different ports is achieved via a select pin, while an output enable (OE) pin can be used to isolate a USB controller and devices.

Designed to minimize board space, the TC7USB221 is available in two package options. The miniature WCSP10 package measures just 1.6mm x 1.2mm x 0.67mm, while the TSSOP14 alternative has dimensions of 4.4mm x 5.4mm x 1.2mm.

OE and I/O pins are equipped with power down protection. In addition, every pin is equipped with ESD protection according to Machine Model and Human Body Model of at least 200V and 2000V respectively.