STUSB4500 datasheet(4/41 Pages) STMICROELECTRONICS

4 / 41 page

Table 1. Pin function list

QFN

CSP

Name

Type

Description

Typical connection

CC1DB

HV AIO

Dead battery enable on CC1 pin

To CC1 pin if used or ground

CC1

HV AIO

Type-C configuration channel 1

To Type-C receptacle A5

B3, C3

Floating

CC2

HV AIO

Type-C configuration channel 2

To Type-C receptacle B5

CC2DB

HV AIO

Dead battery enable on CC2 pin

To CC2 pin if used or ground

RESET

Reset input, active high

From system

SCL

I2C clock input

To I²C master, ext. pull-up

SDA

DI/OD

I2C data input/output, active low open drain To I²C master, ext. pull-up

DISCH

HV AI/OD

Internal discharge path or external

discharge path enable, active low open

drain

From power system (internal

path) or to the discharge path

switch (external path), ext. pull-

GND

Ground

ATTACH

Attachment detection, active low open

drain

To MCU if any, ext. pull-up

ADDR0

I²C device address setting

Static, to ground or ext. pull-up

for address selection,

to ground if no connection to

MCU

ADDR1

I²C device address setting

Static, to ground or ext. pull-up

for address selection,

to ground if no connection to

MCU

POWER_OK3

Power contract flag, active low open drain

To power system, ext. pull-up

GPIO

General purpose output, active low open

drain

To system, ext. pull-up

VBUS_EN_SNK

HV OD

VBUS sink power path enable, active low

open drain

To power switch or to power

system, ext. pull-up

A_B_SIDE

Cable orientation, active low open drain

USB super speed MUX select,

ext. pull-up

VBUS_VS_DISCH

HV AI

VBUS voltage monitoring and discharge

path

From VBUS, receptacle side

ALERT

I2C interrupt, active low open drain

To I²C master, ext. pull-up

POWER_OK2

HV OD

Power contract flag, active low open drain

To power switch or to power

system, ext. pull-up

VREG_1V2

PWR

1.2 V internal regulator output

1 µF typ. decoupling capacitor

VSYS

PWR

Power supply from system

From power system, connect

to ground if not used

VREG_2V7

PWR

2.7 V internal regulator output

1 µF typ. decoupling capacitor

VDD

HV PWR

Power supply from USB power line

From VBUS, receptacle side

GND

Exposed pad is connected to ground

To ground

STUSB4500

Pinout

DS12499 - Rev 2

page 4/41

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