There are five types of connector used with HDMI. Although the main type seen on televisions and other domestic AV equipment is the most widely used, other types exist for other applications as well.
The most common HDMI connector is the type A connector and along with the Type B, these were launched with the initial standard. Other types have been introduced since then to meet specific needs.
HDMI connector types
The different HDMI connector types have remained unchanged after their introduction. This has enabled backwards compatibility to be maintained over the life of the standard.
With the exception of the dual link Type B connector, they all have 19 pins enabling the standard to remain the same across all connector types.
Summaries of the different connector types are given below:
- HDMI Type A connector: This connector was launched with the original standard and has been the mainstay of the HDMI standard since then. The plug or male connector has outside dimensions of 13.9 mm × 4.45 mm, and the receptacle or female connector has inside dimensions of 14 mm × 4.55 mm.
There are 19 pins and the bandwidth is able to carry all SDTV, EDTV, HDTV, UHD, and 4K modes. This connector type is electrically compatible with single-link DVI-D.
- HDMI Type B connector: This connector was also launched with the original standard in 2002 and it is aimed at carrying dual link DVD-I video. The connector has never been used in products because with the introduction of HDMI 1.3, the speed of a single link exceeded that of the old dual link. As the connector is larger than the single link standard style, there has been no reason for its use. However it is still retained within the specifications.
This type of HDMI connector measures 21.2 mm × 4.45 mm and has 29 pins, carrying six differential pairs instead of three.
- HDMI Type C connector: This is the mini-HDMI connector and is smaller than the Type A connector, measuring 10.42 mm × 2.42 mm but still retaining the 19-pin configuration. It was introduced in HDMI Version 1.3.
There are differences in the connector configuration: all positive signals of the differential pairs are swapped with their corresponding shield, the DDC/CEC Ground is assigned to pin 13 instead of pin 17, the CEC is assigned to pin 14 instead of pin 13, and the reserved pin is 17 instead of pin 14.
The HDMI Type C connector can be connected to a type A connector but it requires the use of a type A-to-type C cable.
- HDMI Type D connector: The size of the HDMI Type D connector is very similar to the micro-USB connector and as a result the Type D is often known as a micro HDMI. The measurements are just 6.4 mm × 2.8 mm and within this outline the micro-HDMI retains the 19 pins of the other connectors, although the pin assignments are different. This connector was introduced with HDMI Version 1.4.
- HDMI Type E connector: The Type E HDMI connector is aimed at automotive applications. This connector was introduced with HDMI Version 1.4.
In order to prevent it vibrating loose it incorporates a locking tab and also a shell to help prevent dirt and moisture from entering. Additionally a relay connector is available for connecting standard consumer cables to the automotive ones and enabling an interface to consumer AV items which is happening increasingly.
The variety of HDMI connectors ensures that the HDMI standard can be successfully used in many different areas and they can accommodate the requirements of users of the many different applications for which HDMI is used.