Rail-to-rail steering protection for high-speed data lines
The Texas Instruments TPD4E1B06DCKR is a rail-to-rail steering TVS diode array packing four bidirectional channels into a SC-70-6 package. It clamps transients to the supply rails — reverse standoff is 5.5V max, breakdown starts at 7V min, and typical clamping hits 14.5V at the peak pulse current of 3A (8/20µs waveform). The 45W peak pulse power rating covers ESD strikes and small surge events on general-purpose I/O, USB, HDMI, or other differential signal lines where board space is tight.
Clamping voltage and peak pulse current — what they mean for signal integrity
With a typical clamping voltage of 14.5V at 3A, this device keeps the protected line from seeing a hard rail-to-rail swing during a transient. The 5.5V max reverse standoff means the array sits transparently on a 3.3V or 5V supply rail without leaking appreciably. The 7V minimum breakdown gives a guard band so the part doesn't start conducting during normal signal peaks.
Package and footprint — SC-70-6 (SOT-363)
The TPD4E1B06DCKR comes in a 6-lead SC-70-6 (also known as SOT-363) surface-mount package. The small footprint — roughly 2.0 mm x 1.25 mm — makes it suitable for dense PCB layouts where every square millimetre counts. The supplier device package is SC-70-6, which is the TI-specific variant of the SOT-363 outline. Mounting is surface mount only.