FSUSB42UMX
Overview
The FSUSB42UMX is a high-performance, double-pole double-throw (DPDT) analog switch designed specifically for routing high-speed USB 2.0 signals. It features a wide -3dB bandwidth of 720MHz and low on-capacitance of 3.7pF, ensuring minimal signal degradation during data transmission. The device is housed in a compact 1.4 x 1.8 mm UQFN-10 package, making it ideal for space-constrained mobile and consumer applications.
Why Choose This Part
This switch offers excellent ESD protection with ratings up to 8kV and includes over-voltage tolerance up to 5.25V on all USB ports. Its extremely low operating current of 1uA and break-before-make switching prevent signal contention while maximizing battery life in portable designs.
Applications
Key Specifications
Getting Started
Implementation requires careful PCB layout of differential pairs to maintain 90-ohm impedance through the switch. Designers should place the device as close to the USB connector as possible and ensure the VDD supply is decoupled with a 0.1uF capacitor. Evaluation can be performed by mounting the UQFN-10 package to a breakout board and measuring signal eye diagrams to verify high-speed USB 2.0 compliance.
