FSUSB40UMX

Analog Switches - Special Purpose Overview

The FSUSB40UMX is a low-power, two-port, high-speed USB 2.0 switch configured as a double-pole, double-throw (DPDT) device. It supports switching between two Hi-Speed (480Mbps) sources or a Hi-Speed and Full-Speed (12Mbps) source. The component operates within a supply voltage range of 3.0V to 4.3V and features a typical on-resistance of 3.9Ω with a maximum of 6.5Ω. It provides a wide -3dB bandwidth exceeding 720MHz and maintains a maximum quiescent supply current of 1μA. The device is housed in a 10-Lead Ultrathin Molded Leadless Package (UMLP) measuring 1.4mm by 1.8mm.

Analog Switches - Special Purpose Feature Summary

• Ultra-low power consumption with 1μA maximum quiescent current
• High-speed signal integrity with >720MHz bandwidth and 5.9pF typical on-capacitance
• Integrated power-off protection allowing port tolerance up to 5.25V when VCC is unpowered
• Direct interface capability with general-purpose I/Os via expanded control voltage range

Analog Switches - Special Purpose Applications

• Cell phones and PDAs
• Digital cameras and notebook computers
• LCD monitors, TVs, and set-top boxes

Analog Switches - Special Purpose Procurement Notes

Verify the specific package variant against project requirements, as the FSUSB40 series includes both MicroPak and UMLP options. Confirm that the operating temperature range of -40°C to +85°C aligns with environmental constraints. Ensure control logic voltages remain compatible with the specified input thresholds for reliable switching operation.

Analog Switches - Special Purpose Selection Notes

Select this component for applications requiring bi-directional switching of USB data lines with minimal signal distortion. The low on-resistance and capacitance make it suitable for maintaining signal integrity at 480Mbps. Verify that the 10-pin footprint matches the PCB layout capabilities and that the 3.0V to 4.3V supply range fits the system power architecture.

Analog Switches - Special Purpose Part Context

Originally manufactured by Fairchild Semiconductor, the FSUSB40 was integrated into ON Semiconductor's portfolio following their corporate merger. The part number prefix 'FS' reflects its Fairchild heritage, while the 'UMX' suffix specifically denotes the 10-lead UMLP package configuration. This transition required updates to ordering nomenclature systems but maintained identical electrical specifications.

Analog Switches - Special Purpose Replacement Considerations

The FSUSB42UMX serves as a functional replacement offering similar DPDT switching capabilities. Both components share comparable electrical characteristics and are designed for USB 2.0 applications. Verify pin compatibility and package dimensions before substituting to ensure seamless integration into existing designs.