USB2503A Series

Catalog

IC HUB 3PORT USB COMPATBL 48-QFN

Part	Operating Temperature [Max]	Operating Temperature [Min]	Standards	Function	Voltage - Supply [Max]	Voltage - Supply [Min]	Package / Case	Protocol	Current - Supply	Supplier Device Package	Interface
Microchip Technology USB2503A-HZH	70 °C	0 °C	USB 2.0	Hub Controller	3.6 V	1.62 V	48-VFQFN Exposed Pad	USB	100 mA	48-QFN-EP (7x7)	USB

Catalog

Key Features

• * Compliant with USB 2.0 Specification

• * Hub Controller IC with Three Downstream Ports

• * MultiTRAK Technology Provides One Transaction Translator Per Port

• * Default Configuration with Pin Selectable Options

• * Flexible OEM Configuration Options

• * 48 Pin QFN RoHS compliant package

• * Integrated 1.8V regulator

• * Integrated Termination and Pull-Up/Pull-Down Resistors

• * Internal Short Circuit Protection of DP and DM Lines

• * On-Chip Oscillator Uses Low Cost 24MHz Crystal

• * Supports Ganged or Individual Over-Current Protection and Power Control

• * 3.3V I/O with 5V tolerance

• * Customize Vendor ID, Product ID, and Device ID

• * Operation as a bus-powered, self-powered or dynamic-powered hub. (When configured for dynamic operation, the controller automatically switches to bus-powered mode if a local power source is unavailable).

• * Select whether the hub is part of a compound device (When any downstream facing port is permanently hardwired to a USB peripheral device, the hub is part of a compound device)

• * Select the presence of a permanently hardwired USB peripheral device on a port by port basis

• * Configure the delay time for filtering the over-current sense inputs

• * Configure the delay time for turning on downstream port power

• * Indicate the maximum current that the 3-port hub consumes from the USB upstream port

• * Indicate the maximum current required for the hub controller

• * Select Operation as Either a Bus-Powered Hub or a Self-Powered Hub

• * Select Downstream Ports as Non-removable Ports

• * Select Downstream Ports as Disabled Ports

• * Select Downstream Port Power Control and Over-Current Detection on a Ganged or Individual Basis

• * Select Downstream Port Power Control Polarity

Description

General Description ------------------- 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. 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. 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. \*The [**USBCheck online design review**](https://www.microchip.com/en-us/support/design-help/design-check-services) service is subject to Microchip's [Program Terms and Conditions](https://www.microchip.com/en-us/about/legal-information/microchip-terms-and-conditions-of-sale) and requires a myMicrochip account.