Texas Instruments SN65220DBVR ESD Protection TVS Diode, SOT-23, 6V, 385mW

The Texas Instruments SN65220DBVR is a 6-pin Transient Voltage Suppressor (TVS) diode, specifically engineered to provide robust protection for Universal Serial Bus (USB) low-speed and full-speed ports against electrical noise transients. These potentially damaging voltage spikes, which can originate from various sources in any cabled I/O environment, are safely clamped by this device, shielding sensitive USB transceivers and application-specific integrated circuits (ASICs) from harm.

Key to its performance is a typical low input capacitance of just 35pF, which helps preserve signal integrity. It is important to note that this capacitance makes the device unsuitable for protecting high-speed USB 2.0 ports, where lower capacitance is required. The diode features an exceptionally low leakage current of 1μA at 6V, minimising power loss in standby or normal operation, and can handle a peak forward surge current of 3A.

With a power dissipation rating of 385mW and an operating voltage of 6V, this TVS diode offers reliable protection within its specified parameters. It is supplied in a compact, surface-mount SOT-23 package, making it an ideal choice for space-constrained designs on printed circuit boards (PCBs).

Primary Applications

This component is essential for safeguarding data lines in a variety of electronic systems. Its primary use is in:

• Computers: Protecting USB host and peripheral ports on desktops, laptops, and motherboards.
• Computer Peripherals: Securing interfaces on devices such as keyboards, mice, printers, and external storage units.

By integrating the SN65220DBVR into your design, you add a critical layer of defence against electrostatic discharge (ESD) and other transient voltage events, thereby enhancing the overall reliability and longevity of the electronic equipment.