UART

USB

Micro

USB

DP_HT

TxD

RxD

TSU8111 SWITCH

MATRIX

DM_HT

VBUS

DM_CON

DP_CON

ID_CON

Charger

Detection

Sources

And

Comp’s

Accessory

ID

Detection

ADC

I2C Interface

&

Hardware

Control

VBUS

DP

DM

ID

Buffers and/or

Comparators

JIG

INTB

SDA

SCL

VDDIO

BOOT

I2C

Interface

Switches

RxD

TxD

USB_DM

USB_DP

State Machine

Switch

Ctrl

VBAT

CHARGER

IC

VLDO

LOW

DROPOUT

REGULATOR

TSU8111

SCDS335 – SEPTEMBER 2012

www.ti.com

This integrated circuit can be damaged by ESD. Texas Instruments recommends that all integrated circuits be handled with

appropriate precautions. Failure to observe proper handling and installation procedures can cause damage.

ESD damage can range from subtle performance degradation to complete device failure. Precision integrated circuits may be more

susceptible to damage because very small parametric changes could cause the device not to meet its published specifications.

DESCRIPTION

The TSU8111 is a differential high performance automated SP2T switch with impedance detection and integrated

Li-Ion linear charger device targeted at space-limited portable applications. The switch features impedance

detection which supports the detection of various accessories that are attached through DP, DM and ID. The

charger detection satisfies USB charger specification v1.1. VBUS has 28V tolerance to avoid external protection.

The device operates from either a USB port or dedicated charger and supports charge currents up to 950mA.

Power for this device is supplied through VBAT of the system or through VBUS when attached.

The switch is controlled by automatic detection logic or through I2C manually. JIG and BOOT pins are used

when a USB, UART JIG cable is used to test in the development and manufacturing. TSU8111 has open-drain

JIG output (active low).

BLOCK DIAGRAM

SWITCH MATRIX

2

Submit Documentation Feedback

Copyright © 2012, Texas Instruments Incorporated