7 Detailed Description

7.1 Overview

The TS3USB30E is a high-bandwidth switch specially designed for the switching and isolating of high-speed

USB 2.0 signals in systems with limited USB I/Os. The wide bandwidth (1400MHz) of this switch allows signals

to pass with minimum edge and phase distortion. The device multiplexes differential outputs from a USB host

device to one of two corresponding outputs or from two different hosts to one corresponding output. The switch

is bidirectional and offers little or no attenuation of the high-speed signals at the outputs. The switch is designed

for low bit-to-bit skew and high channel-to-channel noise isolation, and is compatible with various standards such

as high-speed USB 2.0 (480Mbps).

7.2 Functional Block Diagram

D1+

D1–

D2+

D2–

Control

D+

D–

S

OE

7.3 Feature Description

The TS3USB30E has a bus-switch enable pin OE that can place the signal paths in high impedance. This allows

the user to isolate the bus when the bus is not in use to consume less current.

7.4 Device Functional Modes

The device functional modes are shown in Table 7-1.

Table 7-1. Truth Table

S

OE

FUNCTION

X

H

Disconnect

L

L

D = D1

H

L

D = D2

TS3USB30E

SCDS255G – DECEMBER 2008 – REVISED OCTOBER 2024

www.ti.com

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