USBLC6-2P6 | Datasheet | Price | STMicroelectronics STMicroelectronics

USBLC6-2P6

The USBL6-2P6 is a great choice for protecting high-speed data lines like USB 2.0 and Ethernet ports. It offers strong ESD protection, handling up to 15 kV of air discharge and 8 kV of contact discharge, so your devices stay safe from electrostatic damage. With a low capacitance of just 3.5 pF, it won’t affect the signal integrity, making it perfect for high-speed data transfer. It’s also efficient in low-power applications with a leakage current of only 150 nA. This device is compatible with USB 2.0 and Ethernet ports, and it comes in small packages like SOT-666 and SOT23-6L, perfect for compact designs.

USBLC6-2P6 Pinout

For the USBLC6-2P6, the I/O1 and I/O2 pins are used for the USB data lines. I/O1 connects to the D+ line, and I/O2 to the D- line, providing ESD protection. The GND pin is the ground reference, so make sure it’s properly connected to the system’s ground to avoid issues. The VBUS pin protects the 5V power line, preventing voltage spikes during ESD events.

When you’re wiring, connect I/O1 and I/O2 directly to the data lines near the connector to reduce parasitic inductance and ensure good protection. VBUS should also be used to protect the power line. Lastly, placing the device near the connector helps it provide maximum protection against ESD.

USBLC6-2P6 Equivalent

When you’re picking USBLC6-2SC6 as a replacement, just keep in mind it has a slightly larger package (SOT23-6L), so you might have to tweak your PCB layout a bit. Thankfully, the electrical characteristics are similar, so you won’t need major design changes.

If your project involves higher-speed interfaces like USB 3.0, USBULC6-2P6 is probably your better bet, since its lower capacitance (0.6pF) reduces signal loss, perfect for keeping your data transmissions clean.

For more robust ESD protection, SRV05-4 is an option—but its bigger package and higher capacitance (5pF) make it less suitable for high-speed USB. Still, it works fine for protecting general-purpose interfaces.

USBLC6-2P6 USB Line Protection Circuit

The USBLC6-2SC6 is designed to protect USB data lines (D+ and D-) and the VBUS power line from ESD and voltage spikes. It does this by clamping voltage spikes, ensuring your device stays safe. With a low capacitance of just 3.5 pF, it won’t affect your high-speed USB communication. The 100kΩ resistor limits current and prevents damage during faults, while capacitors like C1 (10nF), C2 (100nF), and C3 (4.7µF) help filter noise and stabilize power. The ferrite bead (FB1) reduces high-frequency noise, improving signal quality. For the best protection, ensure the USBLC6-2SC6 is placed close to the USB connector on the PCB.

USBLC6-2P6 Footprint and Layout Tips

When designing the PCB for the USBLC6-2P6, it’s important to follow the correct footprint and layout guidelines. The SOT-666 package has a 6-pin configuration, and you should use the recommended pad sizes to ensure the package fits and is properly soldered. The SOT23-6L package has similar requirements, so make sure the pad sizes and spacing are correct. For optimal ESD protection, place the USBLC6-2P6 close to the USB data lines, ideally near the connector, and keep the traces as short as possible to avoid signal degradation. Proper grounding is key—connect the GND pin directly to the ground plane and ensure wide, short traces for the best ESD performance. Also, place capacitors and ferrite beads near the device to filter power noise and ensure clean data transmission.