The USBN9603-28M is a USB Peripheral Controller from National Semiconductor, now part of Texas Instruments (TI). It's designed to interface with various USB host controllers and manage data transfers between a USB host and peripheral devices. This controller handles the USB protocol, including enumeration, configuration, and data transfer, allowing developers to add USB connectivity to their products.

Applications

• Embedded systems: Used in a wide range of embedded applications requiring USB connectivity, such as data acquisition systems, industrial control devices, and consumer electronics.
• Printers and scanners: Implemented in printers and scanners to facilitate communication with computers over USB.
• Storage devices: Integrated into external hard drives, flash drives, and other storage devices to enable USB data transfer.
• Human interface devices (HIDs): Used in keyboards, mice, and other HID devices to provide USB connectivity.
• Instrumentation: Utilized in test and measurement equipment for data acquisition and control via USB.

Features

• USB 1.1 compliant: Supports the USB 1.1 standard for data transfer rates up to 12 Mbps.
• Integrated transceiver: Includes a built-in USB transceiver for direct connection to the USB bus.
• Endpoint support: Provides multiple endpoints for flexible data transfer management.
• FIFO buffers: Incorporates FIFO buffers for efficient data buffering and handling.
• Interrupt handling: Supports interrupt-driven data transfer for efficient CPU utilization.

Benefits

• Simplified USB integration: Simplifies the process of adding USB connectivity to embedded systems and other devices.
• Reduced development time: Reduces development time by providing a complete USB controller solution.
• Improved system performance: Enhances system performance through efficient data transfer management.
• Lower system cost: Reduces system cost by integrating USB controller functionality into a single chip.
• Wide compatibility: Compatible with a wide range of USB host controllers and operating systems.

Additional Details

The USBN9603-28M typically requires an external crystal oscillator for clock generation. It operates on a 3.3V power supply. Detailed specifications, including timing characteristics, pin assignments, and application circuit examples, can be found in the official TI datasheet. Software drivers are often required for proper operation, and these are usually available from TI or third-party vendors. This chip is typically packaged in a surface-mount package for easy integration into PCB designs. Always refer to the official datasheet for accurate and up-to-date information before designing with this component.