XR

22414

6/13

REV1A

Pin Number

Pin Name

Type Description

32

VCC33

PWR

3.3V power input

33

GND

PWR

Ground

34

EXT_RST#

I

External reset input, active low. Must be asserted for a minimum of 10uS

35

VBUS_SENSE

I

Connect to VBUS from USB host. In self-powered mode, indicates presence of host VBUS power

36

BUS_PWR#

I

Bus power indicator, active low. For bus powered mode, connect to ground. For self powered mode,

connect to logic ‘1’.

37

REG_EN#

I

Active low enable of internal 5V to 3.3V regulator. Connect to logic ‘1’ when XR22414 is powered by

3.3V.

38

VCC5

PWR

5V power to internal 5V to 3.3V regulator. When XR22414 is powered by 3.3V, VCC5 should not be

connected to 5V, and REG_EN# should be tied to logic ‘1’.

39

3V3_OUT

PWR

3.3V power output from internal 5V to 3.3V regulator, may be used to power VCC33 power inputs if

enabled by REG_EN# pin. Must be decoupled with minimum of 10 uF. Leave unconnected if XR22414

is powered by external 3.3V.

40

TEST

I

Test mode enable. Tie to ground for normal device operation

41

VCC33

PWR

3.3V power input

42

LED_CTL

I/O

LED hub active indicator. May also be used in conjunction with port status LEDs. Refer to Figure 4.

43

LED1

I/O

Port 1 LED Indicator. Max source current 3mA. May be used in conjunction with DRV pin. Refer to

Figure 4. Connecting LED1 to ground marks downstream port 1 as non-removable device.

44

LED2

I/O

Port 2 LED Indicator. Max source current 3mA. May be used in conjunction with DRV pin. Refer to

Figure 4. Connecting LED2 to ground marks downstream port 2 as non-removable device.

45

LED3

I/O

Port 3 LED Indicator. Max source current 3mA. May be used in conjunction with DRV pin. Refer to

Figure 4. Connecting LED3 to ground marks downstream port 3 as non-removable device.

46

LED4

I/O

Port 4 LED Indicator. Max source current 3mA. May be used in conjunction with DRV pin. Refer to

Figure 4. Connecting LED4 to ground marks downstream port 4 as non-removable device.

47

PWR1#

O

Power enable for port 1 downstream device in individual power mode. Asserted if OVC1# input is

asserted in individual or global power mode or XR22414 is not configured. Used as global power control

pin if ganged power control mode is selected by connecting PWR4# to ground..

48

OVC1#

I

Downstream port 1 over current indicator in individual current-sensing mode, active low. If PWR4# is

tied to ground, this pin is a global over-current sense input.

49

CPad

PWR

Connect QFN package center pad to PCB ground plane with thermal vias.

NOTE:

Type: I = Input, O = Output, I/O = Input/Output, PWR = Power, OD = Open-Drain.