Philips Semiconductors

Product specification

PDIUSBH12

USB 2-port hub

1999 Jul 22

8

Pin description (MODE 1 – Individual Overcurrent)

PIN NO

PIN SYMBOL

TYPE

DRIVE

DESCRIPTION

1

TEST1

Input

Connect to Ground for 12MHz crystal input.

2

TEST2

Input

3

TEST3

Input

Connect to Ground

4

RESET_N

Input

ST

Power-on reset

5

GND

Power

Ground reference

6

XTAL1

Input

Crystal connection 1 (48 or 12MHz depending on TEST1 pin)

7

XTAL2

Output

Crystal connection 2 (48 or 12MHz depending on TEST1 pin)

8

CLKOUT

Output

3mA

Programmable output clock for external devices

9

Power

Voltage supply 3.3V

± 0.3V

10

OCURRENT2_N

Input

ST

Downstream port 2 over-current notice. This pin is also use to sense the USB

VBUS. A LOW on this pin of less than 2 seconds is interpreted as an overcurrent

notice; longer than 2 seconds is interpreted as loss of VBUS.

11

SWITCH_N

Output

OD6

Enables power to downstream ports

12

SUSPEND

Output

OD6

Device is in suspended state

13

DN2_GL_N

Output

OD6

Downstream port 2 GoodLink

™ LED indicator

14

OCURRENT3_N

Input

ST

Downstream port 3 over-current notice

15

RSVD

Input

Reserved. Connect to GND for normal operation.

16

RSVD

Input

Reserved. Connect to GND for normal operation.

17

INT_N

Output

OD6

Connect to microcontroller interrupt

18

SDA

I/O

OD6

19

SCL

I/O

OD6

20

GND

Power

Ground reference

21

DN3_DP

AI/O

22

DN3_DM

AI/O

23

DN2_DP

AI/O

24

DN2_DM

AI/O

25

AGND

Power

Analog Ground reference

26

Power

Analog voltage supply 3.3V

± 0.3V

27

UP_DP

AI/O

28

UP_DM

AI/O

NOTE:

1. Signals ending in _N indicate active low signals.

ST: Schmitt Trigger

OD6: Open Drain with 6 mA drive

AI/O: Analog I/O