D−

D+

1D−

1D+

2D−

2D+

S

OE

Digital Control

TS3USB221

SCDS220I – NOVEMBER 2006 – REVISED JANUARY 2016

www.ti.com

8 Detailed Description

8.1 Overview

The TS3USB221 device is a 2-channel SPDT switch specially designed for the switching of high-speed USB 2.0

signals in handset and consumer applications, such as cell phones, digital cameras, and notebooks with hubs or

controllers with limited USB I/Os. The wide bandwidth (1.1 GHz) 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. The switch is bidirectional and offers little or no attenuation of the high-speed signals

at the outputs. The device also has a low power mode that reduces the power consumption to 1

μA for portable

applications with a battery or limited power budget.

The device 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 (480 Mbps).

The TS3USB221 device integrates ESD protection cells on all pins, is available in a tiny

μQFN package (2 mm ×

1.5 mm) and is characterized over the free-air temperature range from –40°C to 85°C.

8.2 Functional Block Diagram

8.3 Feature Description

8.3.1 Low Power Mode

The TS3USB221 has a low power mode that reduces the power consumption to 1

μA when the device is not in

use. The bus-switch enable pin OE must be supplied with a logic high signal to put the device in low power mode

and disable the switch.

8.4 Device Functional Modes

Table 1. Truth Table

S

OE

FUNCTION

X

H

Disconnect

L

L

D = 1D

H

L

D = 2D

12

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