The Microchip USB2534 is a low-power, OEM configurable, MTT (Multi-Transaction Translator) USB 2.0 hub controller with 4 downstream ports and advanced features for embedded USB applications. The USB2534 is fully compliant with the USB 2.0 Specification, USB 2.0 Link Power Management Addendum and will attach to an upstream port as a Full-Speed hub or as a Full-/Hi-Speed hub. The 4-port hub supports Low-Speed, Full-Speed, and Hi-Speed (if operating as a Hi-Speed hub) downstream devices on all of the enabled downstream ports.

The USB2534 has been specifically optimized for embedded systems where high performance, and minimal BOM costs are critical design requirements. Standby mode power has been minimized and reference clock inputs can be aligned to the customer’s specific application. Additionally, all required resistors on the USB ports are integrated into the hub, including all series termination and pull-up/pulldown resistors on the D+ and D– pins.

The USB2534 supports both upstream battery charger detection and downstream battery charging. The USB2534 integrated battery charger detection circuitry supports the USB-IF Battery Charging (BC1.2) detection method and most Apple devices. These circuits are used to detect the attachment and type of a USB charger and provide an interrupt output to indicate charger information is available to be read from the device’s status registers via the serial interface. The USB2534 provides the battery charging handshake and supports the following USB-IF BC1.2 charging profiles:

Highlights

• Hub Controller IC with 4 downstream ports
• USB-IF Battery Charger revision 1.2 support on up and downstream ports (DCP, CDP, SDP)
• Battery charging support for Apple® devices
• FlexConnect: Downstream port 1 able to swap with upstream port, allowing master capable devices to control other devices on the hub
• USB to I2C™ bridge endpoint support
• USB Link Power Management (LPM) support
• SUSPEND pin for remote wakeup indication to host
• Vendor Specific Messaging (VSM) support
• Enhanced OEM configuration options available through a single serial I2C EEPROM, OTP, or SMBus Slave Port
• 36-pin (6x6mm) SQFN, RoHS compliant package
• Footprint compatible with USB2514B

Target Applications

• LCD Monitors and TVs
• Multi-function USB Peripherals
• PC Motherboards
• Set-top Boxes, DVD Players, DVR/PVR
• Printers and Scanners
• PC Media Drive Bay
• Portable Hub Boxes
• Mobile PC Docking
• Embedded Systems