The Adafruit CH334F Mini 2-Port USB Hub Breakout features a CH334F USB 2.1 hub chip, which converts one high-speed port into two.

Sometimes, you've got something with a USB host, like an embedded Linux board, and you want to connect more than one thing. Or maybe you want to turn something like a keyboard into a multi-device USB peripheral. The Adafruit CH334F Mini 2-Port USB Hub Breakout will do that for you!

Most folks who use a USB hub get one that comes in an enclosure with connectors or cables included. But those hubs are going to be bulky - they're meant for external use. This breakout board is designed to be compact and easily embedded into an enclosure or existing device. There are four mounting holes but other than that, it's as compact as possible.

Part of how Adafruit kept it small is not including downstream ports! The breakout has either 0.1" header or USB C for the upstream and four 4-pin ports for peripheral connections. It's expected that folks solder directly to the pads or use Adafruit's 'simple' USB breakout cables.

You get one fully assembled/tested board and some header if you want to plug it into a breadboard. Other than that, keep in mind there are no USB ports for the two downstreams - if you need those take a look at our micro B or USB-A hubs.

We also carry a 4-port version here which is a little less than twice the size.

Technical Details

CH334 Specifications:

• 4-port USB HUB, providing 4 USB 2.0 downstream ports, backward compatible with USB 1.1 protocol specification
• Support high performance MTT mode, providing independent TT for each port to achieve full bandwidth concurrent transmission, with 4 times the total bandwidth of STT
• Support port status LED indicators
• Provides crystal oscillator with built-in capacitor, supports external 12MHz input, and built-in PLL provides 480MHz clock for USB PHY
• Built-in 1.5KΩ pull-up resistor on the upstream port, built-in pull-down resistor on the downstream port required for USB Host, streamlined periphery
• USB pins have 6KV enhanced ESD performance, Class 3A 

Product Dimensions: 24.0mm x 20.1mm x 5.0mm / 0.9" x 0.8" x 0.2"

Product Weight: 2.2g / 0.1oz

Learn

• Primary Guide: Adafruit CH334F Mini USB Hub Breakouts - USB ports in a miniature package

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