TUSB2046_DATASHEET.pdfVIP

TUSB2046 4-PORT HUB FOR THE UNIVERSAL SERIAL BUS WITH OPTIONAL SERIAL EEPROM INTERFACE SLLS330A – FEBRUARY 1999 – REVISED AUGUST 1999 1POST OFFICE BOX 655303 ? DALLAS, TEXAS 75265 Universal Serial Bus (USB) Version 1.1 Compliant 32-Pin TQFP Package With a 0.8 mm Pin Pitch 3.3-V Low Power ASIC Logic Integrated USB Transceivers State Machine Implementation Requires No Firmware Programming One Upstream Port and Four Downstream Ports All Downstream Ports Support Full-Speed and Low-Speed Operations Two Power Source Modes – Self-Powered Mode – Bus-Powered Mode Power Switching and Over-current Reporting is Provided Ganged or Per Port Supports Suspend and Resume Operations Supports Programmable Vendor ID and Product ID With External Serial EEPROM 3-State EEPROM Interface Allows EEPROM Sharing Push-Pull Outputs for PWRON Eliminate the Need for External Pullup Resistors Noise Filtering on OVRCUR Provides Immunity to Voltage Spikes Package Pinout Allows 2-Layer PCB Low EMI Emission Achieved by a 6-MHz Crystal Input Migrated From Proven TUSB2040 Hub Lower Cost Than the TUSB2040 Hub description The TUSB2046 is a 3.3 V CMOS hub device that provides one upstream port and four downstream ports in compliance with the 1.1 Universal Serial Bus (USB) specification. Because this device is implemented with a digital state machine instead of a microcontroller, no firmware programming is required. Fully compliant USB transceivers are integrated into the ASIC for all upstream and downstream ports. The downstream ports support both full-speed and low-speed devices by automatically setting the slew rate according to the speed of the device attached to the ports. The configuration of the BUSPWR pin selects either the bus-powered or the self-powered mode. Copyright ? 1999, Texas Instruments IncorporatedPRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of Texas Instruments standard warranty.