HDMI / DVI / MHL

Transition-minimized differential signaling (TMDS) is the backbone technology for HDMI, DVI, and MHL display interfaces.  

Diodes Incorporated has developed superior equalization technology that can recover weak TMDS signals, enabling transmission over longer cable lengths without compromising reliability or image quality. In addition, equalization helps to minimize jitter, which has an increasingly negative impact the longer signals must run.

Key features for Diodes Incorporated video components include:

• High performance: Diodes Incorporated components support high data rates without compromise of quality or reliability.
• Comprehensive Selection: Many digital video applications need to support multiple sources and outputs, as well as different interface standards. Diodes Incorporated has the widest portfolio of 1-, 2-, 3-, and 4-port options, from simple switches to advanced switches capable of supporting all of HDMI’s features with the highest quality.
• Superior signal integrity: Diodes Incorporated's active switches for HDMI employ pre-emphasis, equalization, and amplitude swing adjustment to reshape and recover the signal eye. Signal conditioning gives developers better signal margin, resulting in more design flexibility and flexibility to use lower cost components to reduce overall system cost.
• Ultra low power consumption: the industry’s lowest standby power helps OEMs meet increasingly stringent standby power requirements for consumer electronics equipment.
• Dual capability: Diodes offers signal switches that support both DisplayPort and HDMI at 2K/4K ultra HD resolution with switchable 3D graphics and deep color. Diodes Incorporated ReDrivers™ for HDMI support both DVI and HDMI signals. This enables OEMs designing equipment supporting both protocols, such as a monitor, to use the same circuitry for both interfaces and lower system cost.
• Wake-Up on Use: Switches can wake on use, enabling systems to automatically conserve power.
• Programmable I/O resistors: Programmable I/O enables greater system compatibility as designs evolve.
• System Protection: Electrostatic discharge (ESD) protection is implemented on all input and output channels to prevent core system electronics from being exposed to external shock damage.
• Efficient packaging: Devices come in a variety of package types and sizes to accommodate different application requirements.
• Design Support: As a major supplier providing the industry with millions of units each month, Diodes offers superior design support, including evaluation boards with detailed app notes, availability of local application engineers for schematic and layout review, simulation models, and ATC pre-test capabilities.
• Switches handling high-speed signals can also introduce attenuation that degrades image quality and reliability. To help OEMs differentiate their products with superior signal integrity, Diodes offers HDMI switches with active equalization circuitry based on Diodes' signal conditioning technology that is unparalleled in the industry.  
• Similar in function to a redriver, active switches restore signal quality to enable transmission over longer cable lengths with greater reliability. Diodes Incorporated also offers standalone redrivers.

HDMI

The High-Definition Multimedia Interface (HDMI) is a digital replacement for analog video and has become the industry standard for digital audio/video multimedia transmission. Over the years, HDMI has evolved to enable higher resolution and greater color depth. With the move to HDMI 1.4, 2K and 4K ultra HD resolution is supported with expanded support for color spaces; i.e., 3840 x 2160p Quad HD at 24/25/30 Hz or digital theater resolution of 4096 x 2160p at 24 Hz. Version 1.4 also introduced 3D graphics over HDMI, the HDMI Ethernet Channel (HEC) to enable a 100 Mbps connection between two HDMI connected devices to be able to share an Internet connection, and Audio Return Channel (ARC).  

DVI

DVI (Digital Visual Interface) was designed to transmit uncompressed digital video with support for analog connections, including VGA. Although it is primarily used in computer devices, DVI has been implemented in some consumer electronics equipment such as TVs. However, most new consumer electronic equipment uses all-digital HDMI.

MHL

Mobile High-Definition Link (MHL) is a mobile audio/video standard for directly connecting portable consumer electronic devices such as mobile phones and tablets to high-definition televisions (HDTVs) and other home entertainment equipment. It supports 1080p HD video with digital audio over a single cable while simultaneously powering devices and allows TV remotes to control the mobile device and navigation of content.

While the MHL standard requires only 3 pins, handset designs will utilize the established 5-pin micro USB connector. To achieve this, a multiplexor is required to be able to switch between incoming MHL signals and USB 2.0 High Speed signals. Diodes Incorporated has switch products specifically designed combine both USB and MHL onto the same 5-pin connector without compromising signal integrity or reliability.