FSUSB31 datasheet(2/16 Pages) ONSEMI

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FSUSB31 Rev. 1.1.0

February 2009

FSUSB31

Low-Power, Single-Port, High-Speed USB 2.0 (480Mbps)

Switch

Features

■ Low On Capacitance: 3.7pF (Typical)

■ Low On Resistance: 6.5Ω (Typical)

■ Low Power Consumption: 1µA (Maximum)

– 10µA Maximum ICCT Over an Expanded Control

Voltage Range: VIN = 2.6V, VCC = 4.3V

■ Wide -3dB Bandwidth: > 720MHz

■ 8kV I/O to GND ESD Protection

■ Power-off Protection When VCC = 0V, D+ / D- Pins Can

Tolerate up to 5.5V

■ Packaged in:

– 8-lead MicroPak™ (1.6 x 1.6mm)

– 8-lead US8

– 8-lead Ultrathin MLP (1.2 x 1.4mm)

Applications

■ Cell Phone, PDA, Digital Camera, and Notebook

■ LCD Monitor, TV, and Set-top Box

Related Resources

■ AN-6022 Using the FSUSB30/31 to Comply with

USB 2.0 Fault Condition Requirements

Description

The FSUSB31 is a low-power, single-port, high-speed

USB 2.0 switch. This part is configured as a double-pole,

single-throw switch and is optimized for switching or iso-

lating a high-speed (480Mbps) source or a high-speed

and full-speed (12Mbps) source. The FSUSB31 is com-

patible with the requirements of USB2.0 and features an

extremely low on capacitance (CON) of 3.7pF. The wide

bandwidth of this device (>720MHz) exceeds the band-

width needed to pass the third harmonic, resulting in sig-

nals with minimum edge and phase distortion. Superior

channel-to-channel crosstalk minimizes interference.

The FSUSB31 contains special circuitry on the D+ / D-

pins that allows the device to withstand an over-voltage

condition. This device is also designed to minimize cur-

rent consumption even when the control voltage applied

to the OE pin is lower than the supply voltage (VCC). This

feature is especially valuable for mobile applications,

such as cell phones, allowing direct interface with the

general-purpose I/Os of the baseband processor. Other

applications include port isolation and switching in porta-

ble cell phones, PDAs, digital cameras, printers, and

notebook computers.

Ordering Information

For Fairchild’s definition of “green” Eco Status, please visit: http://www.fairchildsemi.com/company/green/rohs_green.html.

Application Diagram

Figure 1. Typical Application Diagram

Part Number

Package

Eco Status

Package Description

FSUSB31K8X

MAB08A

Green

8-Lead US8, JEDEC MO-187, Variation CA 3.1mm Wide

FSUSB31L8X

MAC08A

RoHS

8-Lead MicroPak, 1.6mm Wide

FSUSB31UMX

UMLP08A

Green

8-Lead, Ultrathin Molded Leadless Package (UMLP), 1.2 x 1.4mm

Base Band

Processor

or FS USB

Controller

HS USB

Controller

VCC

USB

Connector

FSUSB31

D+

D–

MicroPak™ is a trademark of Fairchild Semiconductor Corporation.

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