The TDP158 is an AC-coupled digital video interface (DVI) or high-definition multimedia interface (HDMI) signal input to Transition Minimized Differential Signal (TMDS) level shifting Redriver. The TDP158 supports four TMDS channels, Hot Plug Detect, and a Digital Display Control (DDC) interfaces. The TDP158 supports signaling rates up to 6Gbps to allow for the highest resolutions of 4k 2k 60p 24 bits per pixel and up to WUXGA 16-bit color depth or 1080p with higher refresh rates. For passing compliance and reducing system level design issues, several features have been included such as TMDS output amplitude adjust using an external resistor on the VSADJ pin, source termination selection, pre-emphasis, and output slew rate control. Device operation and configuration can be programmed by pin strapping or I²C. Four TDP158 devices can be used on one I²C bus when I2C_EN is high with device address set by A0/A1.

To reduce active power the TDP158 supports dual power supply rails of 1.1V on VDD and 3.3V on VCC. There are several methods of power management such as going into power down mode using three methods:

1. HPD is low
2. Writing a 1 to register 09h[3]
3. De-asserting OE

De-asserting OE clears the I²C registers, thus once re-asserted, the device must be reprogrammed if I²C was used for device setup. The TDP158 requires the source to write a 1 to the TMDS_CLOCK_RATIO_STATUS register for the TDP158 to resume 75Ω to 150Ω source termination upon return to normal active operation from re-asserted, OE, or re-asserted HPD. If this bit is already set as a one during the source to sink read, then the TDP158 automatically sets this bit to 1. The SIG_EN register enables the signal detect circuit that provides an automatic power-management feature during normal operation. When no valid signal is present on the clock input, the device enters Standby mode. DDC link supports the HDMI 2.0b SCDC communication, 100Kbps data rate default and 400Kbps adjustable by software.

TDP158 supports fixed EQ gain control to compensate for different lengths of input cables or board traces. The EQ gain can be software adjusted by I²C control or pin strapping EQ1 and EQ2 pins. Customers can use the TERM to change to one of three source termination impedance for better output performance when working in HDMI 1.4b or HDMI 2.0b. When the TMDS_CLOCK_RATIO_STATUS bit is set to 1, the TDP158 automatically switches in 75Ω to 150Ω source termination. To assist in ease of implementation, the TDP158 supports lanes swapping, see Section 7.3.3. The device's available extended commercial temperature range is 0°C to 85°C.