FSUSB242UCX-Z002

Analog Switches - Special Purpose Overview

The FSUSB242UCX-Z002 is a Type-C USB port protection switch manufactured by onsemi. It operates within a VDD range of 2.7 V to 5.5 V and provides DC tolerance up to 12 V on the supply pin, with HSD± ports tolerating -18 V to +20 V. The device features an on-resistance (RON) of 5 Ω typical and an on-capacitance (CON) of 5 pF typical. It supports IEC 61000-4-5 surge protection of ±25 V without external TVS diodes. The bandwidth exceeds 720 MHz (-3 dB), and quiescent current is less than 10 nA typical. Overvoltage protection trip points are available at 3.6 V for HSD1 and 4.5 V for HSD2.

Analog Switches - Special Purpose Feature Summary

• Integrated overvoltage protection mechanisms that automatically disable the switch when input voltages exceed defined thresholds, safeguarding downstream host components.
• Built-in surge protection capability compliant with IEC 61000-4-5 standards, eliminating the requirement for discrete transient voltage suppression devices in the signal path.
• Configurable multiplexing architecture allowing selection between two independent high-speed data ports via a single control pin.

Analog Switches - Special Purpose Applications

• Smartphones
• Tablets
• Laptops

Analog Switches - Special Purpose Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to confirm package type and packing method. Ensure the selected variant matches the required operating temperature range and electrical characteristics for your design environment.

Analog Switches - Special Purpose Selection Notes

Select the standard FSUSB242UCX variant if the system requires a 3.6 V overvoltage trip point for the primary data path. Choose the F45 variant if the application demands a higher 4.5 V threshold to accommodate specific signaling levels or power delivery configurations.

Analog Switches - Special Purpose Part Context

This component belongs to the FSUSB242 family of USB Type-C port protection switches. It is designed to provide robust protection and signal routing for high-speed data interfaces in portable electronic devices requiring compact form factors.

Analog Switches - Special Purpose Replacement Considerations

The FSUSB242F45UCX serves as a functional alternative within the same series, distinguished primarily by its adjusted overvoltage protection threshold configuration.

Analog Switches - Special Purpose FAQ

How does the SEL pin manage the switch state?

The SEL pin acts as a tri-state input. A logic low selects HSD1, a logic high selects HSD2, and a high-impedance float state disables the switch to minimize power consumption.

What happens during an overvoltage event?

If the HSD± voltage exceeds the OVP trip threshold, the switch turns off immediately to protect the host. The device automatically recovers to normal operation once the voltage returns below the hysteresis level.