USBN9603-28M/NOPB

Controllers Overview

The USBN9603-28M/NOPB is a Universal Serial Bus Full Speed Node Controller compatible with USB Specification versions 1.0 and 1.1. It integrates a high-speed transceiver, a 3.3V regulator, a Serial Interface Engine (SIE), endpoint FIFOs, an 8-bit parallel interface, and a clock generator. The device supports seven endpoint pipes: one bidirectional Control Endpoint 0 with an 8-byte FIFO, three transmit endpoints, and three receive endpoints, each featuring a 64-byte FIFO. It operates on a 3V to 5.5V supply with a maximum supply current of 30mA. The controller utilizes a 24 MHz external oscillator or clock source, generating an internal 48 MHz clock. It is housed in a 28-pin SOIC package.

Controllers Feature Summary

• Integrated USB transceiver with a 3.3V voltage regulator for full-speed node operation
• Enhanced Direct Memory Access (DMA) support including Automatic DMA (ADMA) for CPU-independent bulk and isochronous transfers
• Versatile microcontroller interface supporting non-multiplexed, multiplexed, and MICROWIRE/PLUS modes
• Seven dedicated endpoint pipes with hardware-managed FIFOs for control, interrupt, bulk, and isochronous data

Controllers Applications

• USB peripheral devices requiring full-speed connectivity
• Portable applications utilizing bus-powered operation with low standby current
• Systems integrating USB functionality via 8-bit parallel or serial microcontroller interfaces

Controllers Procurement Notes

Verify the component status as this part may be designated for limited availability or obsolescence. Confirm that the 28-pin SOIC package matches the target PCB footprint. Ensure the design accounts for the required external 24 MHz crystal or clock source components. Validate that the host system supports USB 1.0 or 1.1 specifications for compatibility.

Controllers Selection Notes

Select this controller for designs requiring a standalone USB node solution with integrated PHY and FIFO management. Choose the -28M variant when pin-to-pin compatibility with the legacy USBN9602 is necessary for board reuse. Consider the ADMA feature if the application demands high-throughput data transfers without heavy CPU intervention. Ensure the power supply architecture can accommodate the 3.3V regulator output requirements for the D+ pull-up resistor.

Controllers Part Context

This component belongs to the USBN960x family of USB node controllers developed by National Semiconductor, now Texas Instruments. It serves as an advanced iteration of the USBN9602, offering improved DMA capabilities and enhanced power management features. The device is designed to simplify USB implementation by consolidating physical layer and media access control functions into a single integrated circuit.

Controllers Replacement Considerations

The USBN9604-28M/NOPB is a pin-compatible alternative within the same family. Verify functional equivalence regarding endpoint configurations and interface modes before substitution.