USB375x

DS00001824A-page 6

 2011 - 2014 Microchip Technology Inc.

2.2

Pin Definitions

The following table details the ball/pin definitions for the package diagrams above.

Pin

Name

Type/

Direction

Description

15

DP

Analog

USB Mux Output

14

DM

Analog

1DP_1

Analog

USB Mux Input 1

16

DM_1

Analog

13

DP_2 / NC

Analog

USB Mux Input 2 (USB3750 Only)

These pins are No Connects for the USB3751 (do not connect)

12

DM_2 / NC

Analog

8GND

Analog

Ground. The QFN package flag should also connected to ground.

6

SCL

Input

10Kohm pull-up.

5

SDA

Open Drain/

IO

requires a 10Kohm pull-up.

7

INT_B

Open Drain/

Output

Open Drain Interrupt. This pin is an open drain output that is

pulled low when an interrupt occurs. A 10Kohm pull-up is required

on this pin.

9

VOUT

Analog

Overvoltage switch output. This pin is connected to VBUS when

the overvoltage protection switch is enabled. It is also the output

of the 100mA current limit.

The three VOUT pins must be connected together. When VBUS

is between UVLO and OVLO VOUT is connected to VBUS. When

VBUS is below UVLO or above OVLO the USB375x will tri-state.

10

11

2

VBUS

Analog

VBUS pin of the USB connector.

The three VBUS pins must be connected together. When the

OVP switch is closed, the VBUS pin will be isolated from VOUT.

When the OVP switch is open, VBUS will be connected to VOUT.

The USB375x is powered from this pin.

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