Single-channel rail-to-rail ESD clamp for high-speed ports
Its ultra-low capacitance of 0.5pF at 1MHz makes it suitable for protecting HDMI, USB 3.0, and other differential signal interfaces where signal integrity is critical. The device clamps transients to 8.9V (max) at 2.5A peak pulse current (8/20µs), keeping sensitive 3.3V and 1.8V I/O within safe limits during an ESD event.
0.5pF — why that number decides the fit
The 0.5pF capacitance at 1MHz is the headline spec that determines whether this part works on your high-speed bus. For HDMI 1.4/2.0 or USB 3.0, the total capacitive loading from the protection device must stay under 1pF to avoid degrading the eye diagram. At 0.5pF, the TPD1E04U04DPLT leaves headroom for PCB parasitics and connector capacitance. If you are protecting a lower-speed line like I2C or GPIO, a higher-capacitance part with lower clamping voltage might be a better trade-off — but for multi-gigabit differential pairs, this is the right tier.
Housed in a 2-X2SON package measuring 0.6mm x 0.3mm (0201 metric footprint), this is a true chip-scale device. Surface-mount assembly requires standard SMT processes, but the tiny land pattern demands careful stencil design and placement accuracy. The 2-pin layout routes the protected signal through the device with minimal stub length — critical for maintaining signal integrity at GHz frequencies. Plan for a via-in-pad or direct trace connection to the protected line, keeping the loop area small to minimize added inductance.