FSUSB46K8X

Analog Switches - Special Purpose Overview

The FSUSB46K8X is a high-speed USB 2.0 switch IC manufactured by onsemi, formerly Fairchild Semiconductor. It features a single DPST (Double Pole Single Throw) configuration with an operating supply voltage of 3.3 V and a maximum power supply voltage of 4.3 V. The device supports a bandwidth of 720 MHz and operates within a temperature range of -40°C to +85°C. Key electrical parameters include a maximum on-resistance of 6.5 Ohms, a maximum turn-on time of 30 ns, and a maximum turn-off time of 25 ns. The quiescent current is 1 uA. It is housed in a US-8 package.

Analog Switches - Special Purpose Feature Summary

• Supports high-speed USB 2.0 data transmission rates
• Provides low on-resistance for signal integrity
• Features ultra-low standby current consumption

Analog Switches - Special Purpose Applications

• Portable electronic devices requiring USB port protection
• Laptop and notebook computer USB hub circuits
• Peripheral connection management systems

Analog Switches - Special Purpose Procurement Notes

Verify the manufacturer status as the component is listed as End-of-Life (EOL). Confirm availability through authorized distributors or surplus suppliers. Check for official Product Change Notices (PCN) regarding final production dates. Ensure compatibility with existing design specifications before procurement due to potential obsolescence.

Analog Switches - Special Purpose Selection Notes

Select this component for applications requiring a compact USB 2.0 switch with low power consumption. The US-8 package suits space-constrained designs. Verify that the 6.5 Ohm on-resistance meets the specific impedance requirements of the target USB interface. Consider alternative active components if higher bandwidth or lower resistance is required.

Analog Switches - Special Purpose Part Context

This part belongs to the FSUSB46 series of USB switches from onsemi. It shares similar electrical characteristics with variants like the FSUSB46L8X, which uses a MicroPak-8 package. The series is designed for portable electronics, offering protection and switching capabilities for USB ports in a small form factor suitable for modern mobile devices.

Analog Switches - Special Purpose Replacement Considerations

The FSUSB46L8X is a confirmed substitute with identical electrical specifications but utilizes a MicroPak-8 package instead of US-8. Verify footprint compatibility during replacement. No other direct substitutes are documented in the provided source material.