Microchip Technology Inc


In Production

The Microchip USB4914  is a USB2.0 Hi-Speed Hub with unique Smart Hub features targeted to automotive consumer ports and head unit applications. The USB4914 is compliant with the USB 2.0 Specification and has passed AEC-Q100 testing.  This highly integrated chip optimizes board area and reduces overall system costs, with the incorporation of  leadership functionality, including;  Multi-Host Endpoint Reflector, battery charging support for industry profiles, embedded 32 bit micro-controller for the implementation of  USB IO bridging and USB Power Delivery.  The multiple downstream USB ports support USB2.0 Low Speed/Full Speed/Hi-Speed with a single USB2.0 Hi-Speed upstream port for host connection.

The Multi-Host Endpoint Reflector employs patented technology such that USB data is 'mirrored" between two USB hosts (Multi-Host) in order to execute USB transactions. This capability is fundamental in delivering architectures for smart phones that require host / device swapping in order to set-up an automotive session, including graphic user interface, from the mobile device to the head unit display. 

Standard USB drivers, which are  native to the operating system, including the CDC/NCM class driver, are utilized to execute device operation. No custom drivers are required.  The Multi-Host Endpoint Reflector is considered a USB controller that is integrated in conjunction with a USB 2.0 Hi-Speed hub and USB2.0 dual role function physical interfaces. 

Contact your Microchip local sales support for information on support documents, demonstration application boards, configuration software, datasheet and application notes. 




        • USB2.0 Hi-Speed Hub
          • 1 Upstream port for USB Host connection
          • 2 downstream ports with dual role (host/device) physical interfaces
          • 1 Non-removable port for cascading hubs or attaching card reader device
        • Patented Multi-Host Endpoint Reflector
        • Device features to enable smart phone automotive sessions with head unit display
        • USB Battery Charging, revision 1.2, support on downstream ports (DCP, CDP, SDP)
        • Battery charging support for China and Apple profiles
        • USB to I2C/I2S, SPI, UART, and GPIO
          • Apple authentication support
          • I2S for audio support; Asynchronous In, Adaptive Out, 48KHz, two channel (16 bits/channel)
          • Flexible I2S capabilities via firmware  update
        • Architected for USB Power Delivery(PD) 3.0 support

          • 32 bit, embedded microcontroller in the hub executes  PD stack and system policy manager
          • Interfaces to Microchip UPD350, Power Delivery Interface device
          • Power delivery stack runs from external  SPI Flash
          • SPI Flash provides flexibility for specification revisions and evolving system needs


        • MultiTRAK
          • Dedicated transaction translator per port
        • PortMap
          • Configurable port mapping and disable sequencing
        • PortSwap
          • Configurable differential intra-pair signal swapping
        • PHYBoost
        • Programmable USB receiver sensitivity
        • USB Link Power Management (LPM) support 
        • Vendor Specific Messaging (VSM) support
        • Enhanced OEM configuration options available through external straps,  OTP configuration or SMBus Slave Port
        • 3.3V supply voltage
        • 48-pin (7x7mm) SQFN
        • 48-pin (7x7mm) Wettable Flanks VQFN


        Target Applications:

        • Media Hubs
        • Infotainment Head Units
        • Break-Out- Boxes
        • After-market automotive products
          • GPS systems
          • Infotainment systems
          • Advanced instrumentations and controls
        • LCD Monitors  
        • Multi-function USB Peripherals 
        • Embedded Automotive Systems
        • Host to Host applications via Ethernet / NCM communication
    Parameter Name
    Automotive Hi-Speed, 4 Port Hub
    Upstream Port
    USB 2.0
    USB Speed
    Downstream Ports
    MGMT I/F
    ROM I/F
    SPI, I2C for OTP
    Op Voltage (V)
    Per-Port Switching
    Port Map
    Port Swap
    PHY Boost
    Charging Emulation
    BC1.2, Apple, China
    Temp. Range Min.
    Temp. Range Max.
      Software Library