What is
DB9 Cable? A
DB9 cable consists of a 9-pin
connector and you can use it for connecting computer peripheries like keyboards and mice. The name of this
connector has come from its trapezoidal shape which looks like the letter "D".
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The VGA connector can use a classic DB9 connector or (more commonly today) a DB15 style connector. ... The VGA connector (15 pin) is still widely used and while it was originally used to carry a 640 x 480 pixel format it is used to carry a variety of geometries including HDTV formats. VGA is an analog standard.Mar 11, 2019
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Direct link to this answer. RS232 is the definition of the serial interface, e.g. the signal voltage and duration. DB9 is the 9 pin connector. RS232 connections are frequently implemented using these connectors, but there is a 25 pin connector also.Mar 6, 2017
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DB9 connectors are designed to work with the EIA/TIA 232 serial interface standard, which determined the function of all nine pins as a standard, so that multiple companies could design them into their products. DB9 connectors were commonly used for serial peripheral devices like keyboards, mice, joysticks, etc.
