Value-line HDMI companion chip for Portable applications

The TPD12S016 is a single-chip High Definition Multimedia Interface (HDMI) device with auto-direction sensing I2C voltage level shift buffers, a load switch, and integrated low capacitance high-speed electrostatic discharge (ESD) transient voltage suppression (TVS) protection diodes. A 55-mA current limited 5-V output (5VOUT) sources the HDMI power line. The control of 5VOUT and the hot plug detect (HPD) circuitry is independent of the LSOE control signal, and is controlled by the CTHPD pin, which enables the detection scheme (5VOUT and HPD) to be active before enabling the HDMI link. The SDA, SCL, and CEC lines pull up to VCCA on the A side. On the B side, the CECB pin pulls up to an internal 3.3-V supply rail, SCLB and SDAB each pull up to the 5-V rail (5VOUT). The SCL and SDA pins meet the I2C specification and drive up to 750 pF capacitive loads, exceeding the HDMI 1.4 specifications. The HPDB port has a glitch filter to avoid false detection due to plug bouncing during the HDMI connector insertion. TPD12S016 offers reverse current blocking at the 5VOUT pin. SCLB, SDAB, CECB pins also feature reverse-current blocking when the system is powered off.