PWRON7

DP6

DM6

OVRCUR6

PWRON6

DP5

DM5

OVRCUR5

PWRON5

DP4

DM4

OVRCUR4

36

35

34

33

32

31

30

29

28

27

26

25

1

2

3

4

5

6

7

8

9

10

11

12

SUSPND

DP0PUR

DP0

DM0

GND

RESET

EECLK

EEDATA/GANGED

VCC

BUSPWR

PWRON1

OVRCUR1

NC - No internal connection

TUSB2077A

SLLS414F – MARCH 2000 – REVISED AUGUST 2015

www.ti.com

6 Pin Configuration and Functions

PT Package

48-Pin LQFP

Top View

Pin Functions

PIN

I/O

DESCRIPTION

NAME

NO.

Power source indicator. BUSPWR is an active-low input that indicates whether the downstream ports source their

BUSPWR

10

I

power from the USB cable or a local power supply. For the bus-power mode, this terminal must be pulled low, and for

the self-powered mode, this terminal must be pulled to 3.3 V. Input must not change dynamically during operation.

DM0

4

I/O

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

DM1

13

DM2

17

DM3

21

DM4

26

I/O

USB differential data minus. DM1–DM7 paired with DP1–DP7 support up to four downstream USB ports.

DM5

30

DM6

34

DM7

38

DP0

3

I/O

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

DP1

14

DP2

18

DP3

22

DP4

27

I/O

USB differential data plus. DP1–DP7 paired with DM1–DM7 support up to four downstream USB ports.

DP5

31

DP6

35

DP7

39

Pullup resistor connection. When a system reset happens (RESET being driven to low, but not USB reset) or any logic

level change on BUSPWR terminal, DP0PUR output is inactive (floating) until the internal counter reaches a 15-ms

DP0PUR

2

O

time period. After the counter expires, DP0PUR is driven to the VCC (3.3 V) level thereafter until the next system reset

event occurs or there is a BUSPWR logic level change.

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

EECLK

7

O

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.

EEPROM serial data/power-management mode indicator. When EXTMEM is high, EEDATA/GANGED selects between

EEDATA/

ganged or per-port power overcurrent detection for the downstream ports. When EXTMEM is low, EEDATA/GANGED

8

I/O

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.

4

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