USB Switches

Overview

Fairchild's USB switches are ideal in any application utilizing a USB port. Functionally and electrically, our switches are ideal for USB port isolation, connector sharing and signal multiplexing. They are often used to share or route USB ports and to isolate Flash memory / uDisk removable devices. The switches are designed to be compliant with USB2.0 Full Speed (FS) and Hi-Speed (HS) with bandwidths in excess of 720MHz.

Products: USB Switches

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Featured Products

Part #	Configuration	Low I_CCT	On Resistance (R_ON) Ohm	Supply Voltage Range (V_CC)	Bandwidth (MHz)	C_ON (pF)	Package
FSUSB46	DPST	Yes	3.9	3V to 4.3V	720	7	8 lead micropak, 8 lead uMLP
FSUSB45	DPDT	Yes	3.9	3V to 4.3V	720	7	10 lead micropak, 10 lead uMLP
FSA201	Double pole, double throw switch	X	3.0	1.65V-5.5V	400	29	10 lead MSOP
FSA201	Double pole, double throw switch	X	1.0	1.65V-5.5V	400	25	10 lead micropak
FSUSB11	1 Port (SPDT) USB, FS	C	1.0	1.65V - 5.5V	350	40	MicroPak^TM 10, TSSOP 14
FSUSB20	1 Port (DPDT) USB, HS	C	5.0	3.0V - 3.6V	800	12	MicroPak^TM 10, DQFN 14
FSUSB22	2 Port (4PDT) USB, HS	C	5.0	3.0V - 3.6V	750	12	DQFN 16, TSSOP 16
FSUSB23	1 Port (DPDT) USB, HS	X	5.0	3.0V - 3.6V	800	9	MicroPak^TM 10, DQFN 14
FSUSB30	1 Port (DPDT) USB, HS	X	6.5	3.0V - 4.3V	720	5	MicroPak^TM 10, DQFN 14
FSUSB31	1 Port (DPST) USB, HS	X	6.5	3.0V - 4.3V	720	5	MicroPak^TM8, US8
FSUSB40	1 Port (DPDT) USB, HS	X	3.9	3.0V-4.3V	720	5.9	MicropakTM10, UMLP
FSUSB42	1 Port (DPDT) USB, HS	X	3.9	3.0V-4.3V	720	3.7	UMLP

Collateral and Literature


FSUSB46 Flyer	Switch Selection Guide	USB Switch Guide
English \| Simplified Chinese	English \| Simplified Chinese	English

Application Notes

Application Note	Description
AN-5066	Improve Your Design with the Adoption of High-Speed USB Switches
AN-6018v2	Fairchild USB Switch Advantages
AN-6019	ESD Test Methodology Overview
AN-6022	Using the FSUSB30 to Comply with USB 2.0 Fault Condition Requirements
AN-6022-SC	FSUSB30/31 容USB2.0 故障条件的要求概述
AN-6022-TC	FSUSB30/31 兼容 USB2.0 故障條件的要求概述

Sample Application Diagrams

FSUSB40 USB switches can be used in multifunction memory stick / wireless LAN adapters.

FSUSB31 is used to isolate the processor from the connector. It provides improved ESD immunity or facilitates power-up management.

Frequently Asked Questions

Find more answers in our Question and Answers Section

1. Why would I use a USB switch instead of a regular analog switch?
Using a USB switch gives extra confidence in the Plug N Play of USB since Fairchild Semiconductor USB switches are optimized for the USB2.0 environment. They also, naturally, are backward compatible for USB1.1.

2. Are Fairchild’s USB switches compliant with USB-IF standards?
Fairchild Semiconductor USB switches are designed to meet the USB-IF compliance specification. The USB switches are often characterized in an environment that emulates a typical product USB-IF compliance test set up.

3. If they comply with the USB standard, wouldn’t all USB switches on the market be the same?
Not necessarily. USB-IF compliance simply validates that a product has passed a recommended subset of tests. These tests give a high probability that Plug N Play functionality will exist across manufacturer’s products. Fairchild Semiconductor USB switches are ideal for USB applications since they are optimized for USB and have very high ESD immunity which is ideal for the ultra-portable Plug N Play products.

4. Can a USB switch pass an audio signal?
Yes, the USB switches will pass an audio signal. The choice of switch will depend upon your audio path characteristics for Ron and the impedance being driven.

Product Information

Product Selection and Datasheets

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