TUSB2040A Datasheet, PDF (1/17 Pages) Texas Instruments – 4-PORT HUB FOR THE UNIVERSAL SERIAL BUS WITH OPTIONAL SERIAL EEPROM INTERFACE

TUSB2040A
4-PORT HUB FOR THE UNIVERSAL SERIAL BUS
WITH OPTIONAL SERIAL EEPROM INTERFACE
SLLS288B – FEBRUARY 1998 – REVISED MARCH 1998
D Universal Serial Bus (USB) Version 1.0
Compliant
D Integrated USB Transceivers
D Four Downstream Ports
D Two Power Source Modes
– Self-Powered Mode
– Bus-Powered Mode
D Power Switching and Overcurrent
Reporting is Provided Ganged or Per Port
D All Downstream Ports Support Full-Speed
and Low-Speed Operations
D Supports Suspend and Resume Operations
D Pin-to-Pin Compatible with the TUSB2040
Device when EXTMEM Pin is Low
D Supports Programmable Vendor ID and
Product ID With External Serial EEPROM
D Tri-State EEPROM Interface Allows
EEPROM Sharing
D Available in 28-Pin DIP and 48-Pin TQFP
Packages
D 3.3-V Operation
N PACKAGE
(TOP VIEW)
OVRCUR2 ₁
PWRON1 ₂
OVRCUR1 ₃
DP0 4
DM0 5
GND 6
DP1 7
DM1 8
BUSPWR/SCL 9
GANGED/SDA 10
DP2 11
DM2 12
V_CC 13
DP3 14
28 ^PWRON2
27 ^V_CC
26 ^OVRCUR3
25 PWRON3
24 GND
23 XTAL1
22 XTAL2
21 EXTMEM
20 PWRON4
19 OVRCUR4
18 RESET
17 DM4
16 DP4
15 DM3
PT PACKAGE
(TOP VIEW)
description
The TUSB2040A hub is a 3.3-V CMOS device
DP0 ₁
that provides up to four downstream ports in
DM0 ₂
compliance with the USB specification 1.0
GND ₃
version. Pin 21 (EXTMEM) enables or disables
the EEPROM interface. When EXTMEM is low,
the TUSB2040A is functionally equivalent to the
NC ₄
NC ₅
DP1 ₆
DM1 ₇
TUSB2040 hub and the product ID (PID)
NC ₈
displayed during enumeration is General Purpose
NC ₉
USB Hub. For this configuration, pins 9 and 10 are
the BUSPWR and GANGED input pins,
BUSPWR/SCL
GANGED/SDA
NC
10
11
12
respectively.
36 GND
35 XTAL1
34 XTAL2
33 NC
32 EXTMEM
31 NC
30 NC
29 PWRON4
28 NC
27 OVRCUR4
26 NC
25 RESET
If programmable vendor ID(VID) and product
ID(PID) descriptors are desired, pin 21 must be
high (EXTMEM = 1) and a SGS Thompson
M93C46 or equivalent EEPROM must be
connected to pins 9 and 10. For this configuration,
the values for BUSPWR and GANGED are stored
in the EEPROM and pins 9 and 10 become the
EEPROM interface.
† _{JEDEC descriptor S–PQFP–G for thin quad flatpack (TQFP)}
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.
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Copyright © 1998, Texas Instruments Incorporated
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