Digital Visual InterfaceHDMI/DVI Cables

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Digital + Analog Interface
DVI-I, having the capacity to carry both digital and analog signals, can be used to connect an analog output to an analog input, or a digital output to a digital input only.  Take note that a DVI-I cable cannot connect a digital output to an analog input or vice versa.  A DVI-I plug will accept any type of DVI cable, DVI-I, DVI-D, or DVI-A, but you must make sure that your source and display are both using the same format for it to work.  Also, DVI-I, as with DVI-D, comes with either a single or a dual TMDS link. 

Single TMDS link DVI cables can support resolutions and timings that use a video clock rate of about 25-165 MHz.  A dual link DVI-I cable, on the other hand, will handle up to 330 MHz and is backwards compatible with single link.  Thus if you are unsure which type you need, the dual link will work where the single link may not.  In order to determine your required bandwidth just multiply your desired resolution by your desired refresh rate (ie. 1600x1200 x 70 = 134 MHz).


DVI-I Single Link Connector
DVI-I Single Link


DVI-I Dual Link Connector
DVI-I Dual Link

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Other DVI Types

The three different types of DVI are DVI-D, DVI-I, and DVI-A.  DVI-D is strictly digital, can support dual link, and contains 24 contacts arranged in three rows of eight.  DVI-I has the original 24 digital contacts, as well as five additional contacts to support analog video.  DVI-I also supports dual link.  DVI-A on the other hand, is only available as a male connector or plug which only mates with the analog contacts of a DVI-I connection.  DVI-A is used to convert between DVI and the traditional analog display technology. 


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