Lowest power USB 2.0 4-port and 7-port hub controllers

October 07, 2016 // By Graham Prophet
These devices use 100 mA and 167 mA supply current for 4-port and 7-port ICs respectively, with all ports active, on what are claimed as the smallest-available pin-count and footprint options for USB 2.0 seven and four port hubs.

Exar's XR22404 and XR22417 are designed for applications where power consumption and board space are a concern such as docking stations, point-of-sale terminals, USB port expansion, test instrumentation, factory automation and other industrial applications. The XR22404 is a cost-effective USB 2.0 4-port hub controller that can be configured for downstream device charging and supports USB Battery Charging Specification 1.1 and 1.2. The XR22404 operates from either 3.3V or 5V supplies, allowing bus- or self-powered operation without an external LDO. Available in a 4 x 4 mm, 24-pin QFN package, the XR22404 is the smallest USB 2.0 4-port hub controller on the market. It is also available in a 28-pin SSOP for less space-constrained applications.

 

The XR22417 is a USB 2.0 7-port hub controller that uses Multiple Transaction Translators (MTT) for the highest possible bandwidth. The XR22417 is available in a 64-pin LQFP package as well as a smaller 48-pin LQFP.

 

The XR22404 and XR22417 are compatible with standard software drivers and include LED indicators to simplify implementation. Both controllers attach to upstream ports at hi-speed (480 Mbps) or full-speed (12 Mbps). The downstream PHYs support hi-speed, full-speed and low-speed (1.5 Mbps) on each port. Pricing starts at $0.89 (XR22404) and $2.09 (XR22417) (1,000)

 

Exar; www.exar.com/product/interface/bridges/usb-hubs