USB2503A中文资料USB Bridges Products数据手册Microchip规格书

描述 Description

Please consider this device USB2513B View Side By Side Comparison
General DescriptionThe 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.
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特性 Features

Note: The USB2503 is not recommended for new designs. The USB2513B is the suggested replacement device for this product.General 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
Hardware Features·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
OEM Selectable FeaturesThe 3-Port Hub supports several OEM selectable features:·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
Pin Selectable Options for Default Configuration·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

简介

USB2503A属于集成电路（IC）的控制器。由制造生产的USB2503A控制器该系列产品主要用于在采用不同通信协议和/或信令方法的端点之间提供信息连接。示例包括将 I2C 总线连接到 UART，将 USB 连接到 I2C、SPI、以太网或 UART、以太网 MAC 和 PHY 等的器件。此外，还包括用于通过为点对点通信设计的接口建立多路连接的器件，例如 USB 集线器控制器。