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TUSB2046 Datasheet

  • TUSB2046

  • 4-PORT HUB FOR THE UNIVERSAL SERIAL BUS WITH OPTIONAL SERIAL...

  • 16頁

  • TI

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TUSB2046
4-PORT HUB FOR THE UNIVERSAL SERIAL BUS
WITH OPTIONAL SERIAL EEPROM INTERFACE
SLLS330A 鈥?FEBRUARY 1999 鈥?REVISED AUGUST 1999
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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
DP0
Firmware Programming
DM0
One Upstream Port and Four Downstream
V
CC
Ports
RESET
All Downstream Ports Support Full-Speed
EECLK
and Low-Speed Operations
EEDATA/GANGED
Two Power Source Modes
GND
鈥?/div>
Self-Powered Mode
BUSPWR
鈥?/div>
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
VF PACKAGE
(TOP VIEW)
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9 10 11 12 13 14 15 16
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SUSPND
TSTMODE
XTAL1
XTAL2
GND
TSTPLL
EXTMEM
V
CC
DP4
DM4
OVRCUR4
PWRON4
DP3
DM3
OVRCUR3
PWRON3
PWRON1
OVRCUR1
DM1
DP1
PWRON2
OVRCUR2
DM2
DP2
Copyright
漏
1999, Texas Instruments Incorporated
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.
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.
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.
POST OFFICE BOX 655303
鈥?/div>
DALLAS, TEXAS 75265
1

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