FSUSB43L10X

Analog Switches - Special Purpose Overview

The FSUSB43L10X is a low-power, two-port, high-speed USB 2.0 switch manufactured by Fairchild Semiconductor. It functions as a bi-directional double-pole, double-throw (DPDT) switch optimized for switching between two high-speed sources or a high-speed and full-speed source. The device supports data rates up to 480Mbps and features an extremely low on-capacitance of 3.7pF typical. It includes over-voltage tolerance on all USB ports up to 5.25V without external components. Key electrical parameters include a typical on-resistance of 3.9Ω and maximum power consumption of 1μA. The component is housed in a MicroPak-10 package with dimensions of 1.60 x 2.10 mm.

Analog Switches - Special Purpose Feature Summary

• Configured as a DPDT switch for bidirectional signal routing between multiple USB sources
• Provides over-voltage tolerance on all USB ports up to 5.25V without requiring external protection components
• Features ultra-low on-capacitance to maintain signal integrity at high speeds

Analog Switches - Special Purpose Applications

• Switching between two high-speed USB 2.0 sources
• Routing signals between a high-speed and a full-speed USB source
• Portable electronic devices requiring low-power USB connectivity management

Analog Switches - Special Purpose Procurement Notes

Verify the specific suffix designation when ordering, as variants such as FSUSB43L10X-F113 and FSUSB43L10X-F131 exist within the same family. Confirm that the received component matches the required package type and functional specifications. Ensure compliance with relevant environmental standards if applicable to the final assembly. Cross-reference the manufacturer datasheet for precise pinout and handling instructions before integration.

Analog Switches - Special Purpose Selection Notes

Select this component when designing circuits that require switching between multiple USB hosts or peripherals with minimal signal degradation. The low on-capacitance makes it suitable for high-speed data lines where signal integrity is critical. Consider the package size constraints and power consumption requirements of the target application. Verify compatibility with the system's voltage levels and control logic interfaces.

Analog Switches - Special Purpose Part Context

The FSUSB43L10X belongs to the FSUSB43 series of USB switches from Fairchild Semiconductor, which was later acquired by ON Semiconductor. This series is designed for portable applications needing efficient USB port management. The L10X suffix typically denotes a specific packaging variant within the broader FSUSB43 family, sharing core electrical characteristics with other members like the standard FSUSB43.

Analog Switches - Special Purpose Replacement Considerations

Direct substitutes include other models in the FSUSB43 family, such as the FSUSB43 itself. Check for equivalent DPDT USB switches with similar capacitance and resistance values. Ensure any replacement maintains the 480Mbps speed capability and low-power profile required by the original design.