FSUSB46L8X

Analog Switches - Special Purpose Overview

The FSUSB46L8X is a USB 2.0 switch IC manufactured by onsemi, formerly Fairchild Semiconductor. It features a single DPST configuration with a maximum on-resistance of 6.5 Ohms and a bandwidth of 720 MHz. The device operates within a supply voltage range of 3 V to 4.3 V, typically at 3.3 V, with a maximum operating current of 1 uA. Switching times are specified as a maximum of 30 ns for turn-on and 25 ns for turn-off. It supports an operating temperature range from -40°C to +85°C and is housed in a MicroPak-8 surface-mount package.

Analog Switches - Special Purpose Feature Summary

• High-speed signal switching capability supporting USB 2.0 data rates
• Low power consumption with minimal standby current draw
• Compact surface-mount packaging suitable for space-constrained designs

Analog Switches - Special Purpose Applications

• Portable electronic devices requiring USB port protection
• Computer peripherals utilizing USB 2.0 interfaces
• Consumer electronics with limited board space

Analog Switches - Special Purpose Procurement Notes

Verify the manufacturer designation carefully, as onsemi acquired Fairchild Semiconductor. Confirm that the specific suffix corresponds to the intended packaging and tape-and-reel specifications required for your assembly process. Ensure compatibility with existing design files regarding pinout and thermal requirements before finalizing procurement orders.

Analog Switches - Special Purpose Selection Notes

Select this component when a low-profile solution is needed for USB 2.0 signal routing. The MicroPak-8 package offers a small footprint compared to standard SOIC options. Consider the 6.5 Ohm on-resistance limit to ensure signal integrity meets USB 2.0 specifications for the specific cable length and load conditions in the target application.

Analog Switches - Special Purpose Part Context

This part belongs to the FSUSB46 series of USB switches. It shares functional similarities with other members like the FSUSB46K8X, though package differences exist. The transition from Fairchild to onsemi branding affects ordering codes but maintains technical continuity for legacy designs originally specifying Fairchild components.

Analog Switches - Special Purpose Replacement Considerations

The FSUSB46K8X serves as a direct alternative with identical electrical characteristics but utilizes a US-8 package instead of MicroPak-8. Verify mechanical fitment before substitution. Other FSUSB46 variants may offer different configurations or performance metrics.