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TUSB2046B, TUSB2046I

SLLS413L – FEBRUARY 2000 – REVISED JUNE 2017

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Copyright © 2000–2017, Texas Instruments Incorporated

6 Pin Configuration and Functions

VF Package

32-Pin LQFP

Top View

RHB Package

32-Pin VQFN With Thermal Pad

Top View

Pin Functions

PIN

I/O

DESCRIPTION

NAME

NO.

BUSPWR

8

I

Power source indicator. BUSPWR is an active-high input that indicates whether the downstream

ports source their power from the USB cable or a local power supply. For the bus-power mode,

this terminal must be pulled to 3.3 V, and for the self-powered mode, this terminal must be pulled

low. Input must not change dynamically during operation.

DM0

2

I/O

Root port USB differential data minus. DM0 paired with DP0 constitutes the upstream USB port.

DM1

11

I/O

USB differential data minus. DM1–DM4 paired with DP1–DP4 support up to four downstream USB

ports.

DM2

15

DM3

19

DM4

23

DP0

1

I/O

Root port USB differential data plus. DP0 paired with DM0 constitutes the upstream USB port.

DP1

12

I/O

USB differential data plus. DP1–DP4 paired with DM1–DM4 support up to four downstream USB

ports.

DP2

16

DP3

20

DP4

24

EECLK

5

O

EEPROM serial clock. When EXTMEM is high, the EEPROM interface is disabled. The EECLK

terminal is disabled and must be left floating (unconnected). When EXTMEM is low, EECLK acts

as a 3-state serial clock output to the EEPROM with a 100-μA internal pulldown.

EEDATA/GA

NGED

6

I/O

EEPROM serial data/power-management mode indicator. When EXTMEM is high,

EEDATA/GANGED selects between ganged or per-port power overcurrent detection for the

downstream ports. When EXTMEM is low, EEDATA/GANGED acts as a serial data I/O for the

EEPROM and is internally pulled down with a 100-μA pulldown. This standard TTL input must not

change dynamically during operation.

EXTMEM

26

I

When EXTMEM is high, the serial EEPROM interface of the device is disabled. When EXTMEM is

low, terminals 5 and 6 are configured as the clock and data terminals of the serial EEPROM

interface, respectively.

GND

7, 28

GND terminals must be tied to ground for proper operation.