Plugable USB-C 延長ケーブル 1 デジタル電流チェッカー内蔵

Google Pixel phones support USB-C DisplayPort Alternate Mode for wired video output, but due to Android OS limitations, they cannot produce two extended external displays using MST, DisplayLink, or Thunderbolt docking technologies. This is a platform constraint, not a hardware or dock issue.

Understanding the Limitation

Google Pixel phones are limited by the Android operating system’s handling of external displays. While many Pixel models (such as the Pixel 7 and Pixel 8 series) support USB-C DisplayPort Alternate Mode, they can only output to a single external display at a time. Android is designed primarily for screen mirroring, and extended display support is extremely limited across Android phones.

Key Point:

Android OS currently restricts Pixel phones to one external display, regardless of the dock or adapter used.

Dock Behavior with Pixel Phones

MST Docks (e.g., Plugable UD-MSTH2)

MST (Multi-Stream Transport) requires the host device to support splitting one DisplayPort signal into multiple independent video streams. While common on Windows and many Chromebooks, Pixel phones do not support MST for extended displays.

When using an MST dock, a Pixel phone will:

• Output to one external display only, or
• Mirror the same content to two connected monitors
• Dual extended desktops are not supported

DisplayLink Docks

DisplayLink technology works on Android through a companion app (e.g., DisplayLink Presenter). However:

• Android only supports a single external display via DisplayLink
• DisplayLink docks cannot be used to achieve multiple extended monitors from a Pixel device
• DisplayLink is not recommended for dual display use on Android

Thunderbolt Docks

Google Pixel phones are not Thunderbolt-certified hosts. When connected to a Thunderbolt dock:

• They revert to basic USB-C DisplayPort Alternate Mode
• Only a single mirrored display is possible

Visual Summary

Recommended Alternatives

If your goal is to use two independent external displays, consider the following instead:

• Windows laptops with DisplayPort MST support
• Chromebooks that support MST

Frequently Asked Questions

Q: Can I extend my Pixel’s screen to two monitors using any method?
A: No. As of now, Android does not support multiple extended displays. Only mirroring to one display is possible.

Q: Does DisplayLink allow multiple displays on Android?
A: No. Even with DisplayLink’s Android app, you are limited to one external display.

Q: Why do Windows and ChromeOS devices work with MST but not Android?
A: Android lacks support for DisplayPort MST and advanced GPU capabilities required for multiple display outputs. This is a software/platform-level limitation.

Conclusion

While Google Pixel phones are capable of driving a single external display, dual extended monitors are not possible due to Android OS restrictions. This applies across all dock types, including MST, DisplayLink, and Thunderbolt. For users requiring robust multi-display setups, we recommend using a Windows or Chromebook device that supports MST alongside a compatible docking station like the Plugable UD-MSTH2.

If you have any questions or need help selecting a compatible dock, reach out to our support team at support@plugable.com.

The new USB Power Delivery specifications allow for the delivery of up to 240W via a USB Type-C cable (an increase from the previous 100W max). The previous Power Delivery range has been relabeled as Standard Power Range (SPR), and the new specifications (between 100W and 240W), have been labeled as Extended Power Range (EPR).

For a more in-depth look feel free to check out our blog post on this topic here: https://plugable.com/blogs/news/what-is-240w-usb-extended-power-range-epr

At first glance, USB-C and Thunderbolt ports may look the same, but their capabilities can vary significantly. Understanding these differences is key to ensuring compatibility and getting the most out of your Plugable devices.

What is USB-C?

USB-C is a type of connector that supports a range of protocols including data transfer, video output, and charging. It's widely adopted across modern laptops, smartphones, tablets, and more.

Common USB-C Standards:

• USB 3.0 / 3.1 Gen 1: Up to 5Gbps data transfer.
• USB 3.2 Gen 2: Up to 10Gbps data transfer.
• USB 3.2 Gen 2x2: Up to 20Gbps data transfer.
• USB4: Up to 40Gbps data transfer, supports DisplayPort 1.4 and optional Thunderbolt 3 compatibility.

Note: USB-C ports may or may not support features like video output (DisplayPort Alt Mode) or USB Power Delivery (PD). Always check your device's specs.

What is Thunderbolt?

Thunderbolt is a hardware interface developed by Intel (in collaboration with Apple for earlier versions) that builds on USB-C, but adds advanced features and higher performance.

Thunderbolt Versions:

Thunderbolt 3:

• Up to 40Gbps data transfer
• Supports two 4K displays or one 5K display
• Supports USB, DisplayPort, and PCIe over a single cable
• Provides up to 100w of Power Delivery (PD)

Thunderbolt 4:

• Maintains Thunderbolt 3's speeds (40Gbps)
• Support for dual 4K or one 8K display
• Can be used with USB4 ports
• Provides up to 100w of PD

Thunderbolt 5:

• Up to 80Gbps bi-directional bandwidth, and up to 120Gbps in one direction for high-bandwidth applications (using Bandwidth Boost)
• Supports dual 6K displays or a single high-refresh-rate 8K display
• Backward compatible with Thunderbolt 4 and USB4
• Enhanced PCIe support and improved power efficiency
• Ideal for advanced gaming setups, content creation, and future-proof professional workflows

USB-C vs. Thunderbolt: Key Differences

How to Identify Each Port

• Thunderbolt ports often have a lightning bolt symbol next to the port.
• USB-C ports may be unmarked or show a symbol for power or DisplayPort.
• Refer to your laptop or device’s technical specifications for confirmation.

Compatibility Tips

• Thunderbolt 3/4/5 devices can typically connect to USB-C ports, but they will function at reduced capabilities (e.g., lower speeds, fewer display outputs).
• USB-C devices can connect to Thunderbolt ports and work normally, but won’t take advantage of Thunderbolt’s full capabilities.

Understanding whether your device supports USB-C, Thunderbolt, or both can help you choose the right Plugable docking station or adapter for your needs. If you run into any questions, feel free to reach out to our support team at support@plugable.com

Many users assume that USB-C devices can work with older Thunderbolt 2 Macs if they use a Thunderbolt 3 to Thunderbolt 2 adapter, such as the one made by Apple. However, this is not the case. These adapters are specifically designed to support Thunderbolt devices only - not standard USB-C peripherals.

While Thunderbolt 3 and USB-C share the same connector type, they use different underlying data protocols. Non-Thunderbolt USB-C devices, rely on USB standards for data and power. The Thunderbolt 3 to Thunderbolt 2 adapter does not carry USB signals; it only passes Thunderbolt data. Because of this, plugging a USB-C device into a Thunderbolt 2 Mac using this adapter will not work - the computer will not detect or communicate with the device.

If you need to connect peripherals to a Thunderbolt 2 system, we recommend using a USB-A dock or hub (if available on your system). This ensures compatibility without relying on unsupported adapter chains.

In short, even though the connectors may fit, USB-C devices are not compatible with Thunderbolt 2 Macs via Thunderbolt adapters - only Thunderbolt devices will work in that setup.