The TPD12S521 is a single-chip electro-static discharge (ESD) circuit protection device
for the high-definition multimedia interface (HDMI) transmitter port. While providing ESD
protection with transient voltage suppression (TVS) diodes, the TVS protection adds little or no
additional glitch in the high-speed differential signals. The high-speed transition minimized
differential signaling (TMDS) ESD protection lines add only 0.8-pF capacitance.
The low-speed control lines offer voltage-level shifting to eliminate the need for an
external voltage level-shifter IC. The control line TVS diodes add 3.5-pF capacitance to the
control lines. The 38-pin DBT package offers a seamless layout routing option to eliminate the
routing glitch for the differential signal pairs. The DBT package pitch (0.5 mm) matches with the
HDMI connector pitch. In addition, the pin mapping follows the same order as the HDMI connector pin
mapping. The TPD12S521 provides an on-chip current limiting switch with output ratings of 55 mA at
pin 38. This enables HDMI receiver detection even when the receiver device is powered
off.
