6 Detailed Description

6.1 Overview

The TS3USB3031 device is a 2-channel, 1:3 multiplexer that includes a high-speed Mobile High-Definition Link

(MHL) or Mobility Display Port (MyDP) switch and USB 2.0 High-Speed (480 Mbps) switches in the same

package. This device is used in many high-speed differential 1:3 mux applications.

6.2 Functional Block Diagram

D+

MHL+

USB1+

Control

Logic

SEL0

SEL1

TS3USB3031

USB2+

D-

MHL-

USB1-

USB2-

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6.3 Feature Description

6.3.1 IOFF Protection

IOFF protection prevents current leakage through the device when Vcc = 0 V This allows signals to be present on

the D± and USB/MHL± pins before the device is powered up without damaging the device or system.

6.3.2 1.8-V Compatible Logic

The TS3USB3031 device supports 1.8-V logic irrespective to the supply voltage applied to the IC.

6.3.3 Overvoltage Tolerant (OVT)

The D± and USB/MHL± pins of the device can support signals up to 5.5 V without damaging the device. This

protects the TS3USB3031 in case the VBUS pin of the USB connector is shorted to the signal path without

additional components added.

6.4 Device Functional Modes

Table 6-1 lists the functional modes of the TS3USB3031.

Table 6-1. Function Table

SEL1

SEL0

SWITCH STATUS

Low

Low

D+/D– connected to USB1+/USB1–

Low

High

D+/D– connected to USB2+/USB2–

High

Low

D+/D– connected to MHL+/MHL–

High

High

USB and MHL switches in High-Z

TS3USB3031

SCDS348D – SEPTEMBER 2013 – REVISED AUGUST 2024

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