Intersil Debuts a Single-Supply USB 2.0 High-Speed Multiplexer

Intersil Corporation specializing in the design and manufacture of analog and mixed-signal semiconductors announced the introduction of a new integrated circuit that has features required for portable products where internal USB high-speed ports share a single USB connector.

 

The device is also bidirectional and allows sharing of a host USB port between multiple outputs like in desktop or laptop computers, portable mini-printers or docking stations, clarified Intersil sources.

 

The ISL54222A is a single-supply USB 2.0 high-speed multiplexer which operates from a single 1.8V to 3.3V supply. It features human body model electrostatic discharge performance of > 12kV on input-output terminals. The low supply voltage and high ESD protection offers flexibility and makes it suitable for applications like Smartphones, MP3 players, personal navigation devices and digital cameras.

 

The device also includes internal charge pumps that reduce switch resistance and open the USB eye for enhancing performance at 480 Mbps. It has two, single pole/double throw switches that are configured as DPDT. The part is suitable for switching or routing of USB high-speed signals and/or USB full-speed signals in portable battery powered products, explained company officials.

 

When power is off the fail-safe operation ensures that the device is not accidentally switched on in the power-down state. Power-saving output-enable control allows switches to be open when no USB interface is being used. This reduces power consumption significantly.

 

The low ron and low-capacitance switches provide operating margins for noise and cable reflections besides meeting USB requirements. The ISL54222A can withstand over-voltages even beyond the supply rails. It also meets USB 2.0 short-circuit requirements eliminating the need for additional external components.

 

Intersil said that the 5.5 ohm switches can swing rail-to-rail and are designed to pass USB full-speed data signals ranging from 0V to 3.6V and USB high-speed data signals ranging from 0V to 400mV with a single supply as low as 1.8V. This allows the passage of USB high-speed data signals with minimum distortion owing to the high bandwidth and low capacitance offered.

 

The products manufactured by Intersil cater to power management functions and analog signal processing functions. The company also makes ICs for battery management, hot-plug controllers, linear regulators, power sequencers, supervisory ICs, bridge drivers, PWM controllers and switching DC/DC regulators among several others.