TUSB2046B Datasheet, PDF (1/21 Pages) Texas Instruments – 4-PORT HUB FOR THE UNIVERSAL SERIAL BUS WITH OPTIONAL SERIAL EEPROM INTERFACE

TUSB2046B, TUSB2046BI
4ĆPORT HUB FOR THE UNIVERSAL SERIAL BUS
WITH OPTIONAL SERIAL EEPROM INTERFACE
SLLS413B − FEBRUARY 2000 − REVISED DECEMBER 2004
D Universal Serial Bus (USB) Version 1.1
Compliant
D 32-Terminal LQFP^† Package With a 0.8-mm
Terminal Pitch
D 3.3-V Low Power ASIC Logic
D Integrated USB Transceivers
D State Machine Implementation Requires No
Firmware Programming
D One Upstream Port and Four Downstream
Ports
D All Downstream Ports Support Full-Speed
and Low-Speed Operations
D Two Power Source Modes
DP0
DM0
V_CC
RESET
EECLK
− Self-Powered Mode
− Bus-Powered Mode
EEDATA/GANGED
GND
D Power Switching and Overcurrent
BUSPWR
Reporting Is Provided Ganged or Per Port
D Supports Suspend and Resume Operations
D Supports Programmable Vendor ID and
Product ID With External Serial EEPROM
D 3-State EEPROM Interface Allows EEPROM
Sharing
D Push-Pull Outputs for PWRON Eliminate
the Need for External Pullup Resistors
D Noise Filtering on OVRCUR Provides
Immunity to Voltage Spikes
D Package Pinout Allows 2-Layer PCB
D Low EMI Emission Achieved by a 6-MHz
Crystal Input
D Migrated From Proven TUSB2040 Hub
D Lower Cost Than the TUSB2040 Hub
D Enhanced System ESD Performance
D Supports 6-MHz Operation Through a
Crystal Input or a 48-MHz Input Clock
VF PACKAGE
(TOP VIEW)
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DP4
DM4
OVRCUR4
PWRON4
DP3
DM3
OVRCUR3
PWRON3
description
The TUSB2046B 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 terminal selects either the bus-powered or the
self-powered mode.
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
†JEDEC _{descriptor S-PQFP-G for low profile quad flat pack (LQFP).}
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
Copyright  2004, Texas Instruments Incorporated
• POST OFFICE BOX 655303 DALLAS, TEXAS 75265
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