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TUSB2043 Datasheet(PDF) 9 Page - Texas Instruments

Part No. TUSB2043
Description  4-PORT HUB FOR THE UNIVERSAL SERIAL BUS WITH OPTIONAL SERIAL EEPROM INTERFACE
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Maker  TI [Texas Instruments]
Homepage  http://www.ti.com
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TUSB2043 Datasheet(HTML) 9 Page - Texas Instruments

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TUSB2043
4-PORT HUB FOR THE UNIVERSAL SERIAL BUS
WITH OPTIONAL SERIAL EEPROM INTERFACE
SLLS308A – FEBRUARY 1999 – REVISED AUGUST 1999
9
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
APPLICATION INFORMATION
USB design notes
The following sections provide block diagram examples of how to implement the TUSB2043 device. Note, even
though no resistors are shown, pullup, pulldown, and series resistors must still be used to properly implement
this device. Figure 1 shows a few resistors that must be used for the USB lines, and for a general reference
design, one is available on the TI USB web site at http://www.ti.com/sc/usb.
Figure 6 is a block diagram example of how to connect the external EEPROM if a custom product ID and vendor
ID are desired.
Figure 7 is an example of how to generate the 48-MHz clock signal. Figure 7 shows the EEPROM read operation
timing diagram. Figures 8, 9 and 10 illustrate how to connect the TUSB2043 device for different power source
and port power management combinations.
1 k
DP0
DM0
EEDATA
TUSB2043 USB Hub
System
Power-On Reset
Regulator
Power
Switching
OVRCUR1 –
OVRCUR4
PWRON1 –
PWRON4
EECLK
RESET
TESTIN
EXTMEM
VCC
GND
DP1 – DP4
DM1 – DM4
GND
Vbus
5 V GND
USB Data lines
and Power to
Downstream
Ports
Bus or Local Power
4
4
4
4
30
4
1
2
6
5
3, 25
7, 28
12, 16, 20, 24
10, 14, 18, 22
11, 15, 19, 23
9, 13, 17, 21
5
8
6
2
4
3
ORG
VCC
VSS
D
Q
C
S
1
EEPROM
3.3 V
26
48 MHz Oscillator
CLKIN
27
MODESLCT
31
1 k
0.1
µF
3.3 V
Figure 6. Typical Application of the TUSB2043 USB Hub


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