Ultra-Low-Voltage USB 2.0 Multiplexer Targets Portable Devices

The ISL54222A is a single-supply USB 2.0 high-speed multiplexer that can operate from a single 1.8-V to 3.3-V supply. It’s intended for portable products where internal USB high-speed ports may need to share a single USB connector, and is bidirectional to allow sharing of a host USB port between multiple outputs. The multiplexer features Human Body Model (HBM) electrostatic discharge (ESD) performance of >12 kV on input-output (I/O) terminals. This combination of low supply voltage and high ESD protection makes it well suited for applications such as SmartPhones, MP3 players, personal navigation devices, and digital cameras. Internal charge pumps lower switch resistance and open the USB eye for better performance at 480 Mbps. The multiplexer contains two SPDT (single pole/double throw) switches configured as a DPDT. Fail-safe operation provides low switch leakage when the power is off, which prevents the device from being accidentally turned on while in the power-down state. Power-saving output-enable control allows all switches to be open when no USB interface is in use, which reduces power consumption to less than 1 µA. The ISL54222A operates over a temperature range of -40°C to +85°C. It is available now in 10-lead µTQFN, TQFN, and MSOP packages. Pricing is set at $0.52 in 1000-unit lots. INTERSIL CORP., Milpitas, CA. (888) 468-3774.