FSUSB40L10X

Analog Switches - Special Purpose Overview

The FSUSB40L10X is a low-power, dual-port, high-speed USB 2.0 switch configured as a double-pole double-throw (DPDT) device. It facilitates switching between two high-speed sources at 480Mbps or between high-speed and full-speed sources at 12Mbps. The component features a typical on-state capacitance of 5.9pF and an on-resistance of 3.9Ω. It operates within an input voltage range of 1.8V to 5V and a VCC range of 4.3V, with a maximum supply current of 15μA. The device offers a -3dB bandwidth exceeding 720MHz and provides ESD protection ratings of 8kV for human body model and over 16kV for machine model.

Analog Switches - Special Purpose Feature Summary

• Configured as a DPDT switch for routing signals between multiple high-speed or mixed-speed USB sources
• Provides power-down protection where all ports remain isolated when VCC is at 0V
• Supports overvoltage tolerance up to 5.25V on D+/D- pins without external components

Analog Switches - Special Purpose Applications

• Portable electronic devices requiring efficient power management for USB connectivity
• Systems needing signal routing between host controllers and peripheral devices
• Equipment utilizing both high-speed and full-speed USB interfaces

Analog Switches - Special Purpose Procurement Notes

Verify the manufacturer designation, as Fairchild Semiconductor operations have been integrated into onsemi. Confirm that the specific suffix corresponds to the intended MicroPak or UMLP package variant. Ensure compliance with current RoHS standards by checking the official datasheet documentation provided by the current rights holder rather than relying on legacy distributor listings.

Analog Switches - Special Purpose Selection Notes

Select this component when a bidirectional switch is required for dual-port USB 2.0 applications. The low on-state capacitance makes it suitable for maintaining signal integrity in high-speed data lines. Consider the available package options based on board space constraints, ensuring the chosen variant matches the thermal and mechanical requirements of the target design.

Analog Switches - Special Purpose Part Context

This part belongs to the FSUSB series of USB interface switches originally developed by Fairchild Semiconductor. Following corporate restructuring, these products are now managed under onsemi. The FSUSB40 specifically addresses the need for compact, low-power switching solutions in mobile and portable electronics where space and energy efficiency are critical design parameters.

Analog Switches - Special Purpose Replacement Considerations

FSUSB43L10X: A similar DPDT USB switch offering comparable functionality with potentially different electrical characteristics such as on-resistance.