USB HUB Controller 36-Pin QFN EP

The SMSC USB251xB/xBi hub is a family of low-power, configurable, MTT (multi transaction translator) hub controller IC products for embedded USB solutions. The x in the part number indicates the number of downstream ports available, while the B indicates battery charging support. The SMSC hub supports lowspeed, full-speed, and hi-speed (if operating as a hispeed hub) downstream devices on all of the enabled downstream ports.

• USB251xB/xBi products are fully footprint compatible with USB251x/xi/xA/xAi products as direct drop-in replacements
  • Cost savings include using the same PCB components and application of USB-IF Compliance by Similarity
• Full power management with individual or ganged power control of each downstream port
• Fully integrated USB termination and pull-up/pulldown resistors
• Supports a single external 3.3 V supply source; internal regulators provide 1.2 V internal core voltage
• Onboard 24 MHz crystal driver or external 24 MHz clock input
• Customizable vendor ID, product ID, and device ID
• 4 kilovolts of HBM JESD22-A114F ESD protection (powered and unpowered)
• Supports self- or bus-powered operation
• Supports the USB Battery Charging specification Rev. 1.1 for Charging Downstream Ports (CDP)
• The USB251xB/xBi offers the following package:
  • 36-pin QFN (6x6 mm) RoHS compliant package
• USB251xBi products support the industrial temperature range of -40°C to +85°C
• USB251xB products support the extended commercial temperature range of 0°C to +85°C