Claimed to be the industry's only complete HDMI 1.4 signal-conditioning and protection IC, the IPC4786CZ32 is available from NXP Semiconductors. The company claims that it provides the industry's highest protection for HDMI 1.4 transmitters. It uses a transmission line clamping architecture that provides lower peak clamping voltages during an ESD strike. Zero-clamping buffers on the control lines isolate these signals from an ESD strike. Best Signal Integrity. The TLC protection architecture integrates impedance-matching inductors along with the ESD protection device, providing matched 100 ohm differential impedance through the device. Unlike traditional shunt ESD devices which require board-specific external compensation, the IP4786CZ38 does not require any additional adjustment to the PCB layout, and impedance is independent of the PCB board stackup. The buffers on the control lines provide voltage level translation on both high and low logic levels. The buffers overcome the slow signal rise times associated with long cable lengths in set-top boxes, standard- and high-definition DVD players, Blu-ray players and A/V switches. The low power consumption in standby mode, also makes it suitable portable media players, notebooks and tablets, game consoles, mobile phones, and digital camcorders and cameras.
