HDMI interface protection and conditioning in a 38-TSSOP
The TPD12S521DBTR from Texas Instruments is a specialized interface IC designed for HDMI signal conditioning and ESD protection in a compact 38-TSSOP package. It operates from a 5V to 5.5V supply rail, making it a drop-in fit for systems that already carry a 5V bus — typical in desktop PCs, CAD/CAM workstations, point-of-sale terminals, and audio/video equipment where HDMI port integrity matters.
Supply rail and power budget
If your system runs a 3.3V-only HDMI source, this part needs a separate 5V regulator or a boost converter. The 0.5V headroom above 5V is slim; a 5V rail that droops below 5V under load still keeps the IC happy, but anything above 5.5V needs a clamp or a different part.
Package and board integration
The 38-TFSOP (4.40mm width) footprint — also designated as 38-TSSOP — is a fine-pitch surface-mount package that demands careful solder-paste stencil design and reflow profiling. The narrow body (4.40 mm) saves board area but limits trace escape routing under the part; a four-layer board with a solid ground plane under the package helps signal integrity for the HDMI differential pairs.
Lifecycle and sourcing posture
ROHS3 compliant.