Microchip TechnologyСША

<h2>General Description</h2><p>The USB2503 3-port hub controller is fully compliant with the USB 2.0 Specification and does not require firmware development. When connected to a USB high-speed host, the three downstream ports can operate at low-speed (1.5Mb/s), full-speed (12Mb/s), or high-speed (480Mb/s). As required by the USB 2.0 Specification, the USB2503 is fully backward compatible with legacy USB full-speed hosts.</p><p>A default configuration is available in the USB2503 following a reset. This configuration may be sufficient for some applications when it is desired to save the expense of an EEPROM. The controller may be configured from a microcontroller or an external EEPROM. When using the microcontroller interface, the USB2503 appears as a SMBus slave device. The EEPROM interface supports a 2-wire I2C device.</p><p>All required resistors on the USB ports are integrated into the USB2503. This includes all series termination resistors on D+ and D- pins and all required pull-down and pull-up resistors on D+ and D- pins. The over-current sense inputs for the downstream ports have internal pull-up resistors.</p><p><br></p><p>*The <a href="https://www.microchip.com/en-us/support/design-help/design-check-services" rel="noopener noreferrer" target="_blank"><strong>USBCheck online design review</strong></a> service is subject to Microchip's <a href="https://www.microchip.com/en-us/support/design-help/design-check-services/design-check-services-program-terms-and-conditions" rel="noopener noreferrer" target="_blank">Program Terms and Conditions</a> and requires a myMicrochip account.</p>