USBN9603SLBX

Controllers Overview

The USBN9603SLBX is a Universal Serial Bus controller manufactured by National Semiconductor, now part of Texas Instruments. It is designed to facilitate USB communication between a host microcontroller and USB peripherals. The device operates within a supply voltage range of 3 V to 5.5 V, with a nominal rating of 5 V. It supports a maximum clock frequency of 24 MHz and features an 8-bit external data bus width alongside an 8-bit address bus width. The component is housed in a small outline package with 28 terminals arranged in a dual gull-wing configuration, suitable for surface mount installation. It functions as a pure interface chip without an integrated microprocessor.

Controllers Feature Summary

• Provides a dedicated hardware interface for USB protocol handling, offloading communication tasks from the main system processor.
• Supports both low-speed (1.5 Mbps) and full-speed (12 Mbps) USB data transfer rates compliant with USB 1.1 specifications.
• Integrates multiple FIFO ports including bidirectional control, transmit, and receive channels to manage data buffering efficiently.

Controllers Applications

• Development of USB dongles and hardware encryption keys requiring secure data exchange.
• Integration into embedded monitoring systems connecting ARM-based microprocessors to PC hosts.
• Implementation of peripheral interfaces in industrial control units replacing legacy serial connections.

Controllers Procurement Notes

Verify the specific suffix SLBX against current manufacturer documentation to confirm pinout compatibility and package dimensions. Confirm availability status as original National Semiconductor products may be discontinued or superseded by newer revisions. Ensure sourcing from authorized distributors to guarantee authenticity and proper storage conditions for CMOS components.

Controllers Selection Notes

Select this component when a standalone USB controller is required rather than an integrated MCU solution. It is appropriate for designs where the primary processor handles application logic while the USBN9603 manages the physical layer and protocol stack. Consider the 28-pin SOP package constraints and 8-bit parallel interface requirements during PCB layout planning.

Controllers Part Context

This controller belongs to the USBN960x series developed by National Semiconductor, which includes variants like the USBN9602 and USBN9604. These devices were widely used before the industry shifted toward integrated USB MCUs. The series provides a cost-effective solution for adding USB connectivity to existing microcontroller architectures without significant firmware overhead.

Controllers Replacement Considerations

Check for direct pin-compatible replacements within the same family, such as the USBN9604, if additional features are needed. Verify if newer Texas Instruments USB controllers offer backward compatibility with the parallel interface architecture. Consult official substitution guides for any updated versions that maintain the same functional specifications.