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Feb 17, 2012

Types Of Cables- Used in Computers

There are many cables are using in to a Computer System..Its Confusing to identify each-others.
Here u got information about some of the most frequently used cables.

So in this post I will try to provide you with a short description of these Cables.

1. USB :
USB stands for Universal Serial Bus.
  • Today it is the most popular standard for connecting various peripheral devices to a computer.
  • Using USB port you can easily connect almost everything devices to your computer.
  •  There are 3 versions of USB.
USB 1.0/1.1 – offers data transfer speeds up to 12Mbit / s and  uses four wires (2 for data and 2 for power supply)

USB 2.0 – This is the most commonly used version of this type of interface. It provides higher speed data transfer rates(480 Mbit / s) and compatibility with older versions of USB. (e.g.USB 1.0)

USB 3.0 – provides max. data transfer speed up to 4.8 Gbit / s (600 MB / s theoretical speed) and backward compatibility with previous versions.

2. VGA :
  • VGA stands for Video Graphics Array.
  • VGA interface was created in the late 1980′s and until now remains a standard way for connection between a computer and monitor.
  • Today, however, it is almost replaced by the digital interface DVI.
  • VGA consists of 15 contacts arranged in three rows, each of which corresponds to three separate channels – red, green and blue. 
  • Although almost all Video or Graphics cards on the market are equipped with VGA and DVI ports.
  • TV-Tuner cards also have one or more VGA ports. 
3. SATA :
  • SATA stands for Serial Advanced Technology Attachment.
  • SATA cables are designed to replace the older ATA cables used for connection of storage devices.
  • Since SATA have higher data transfer speeds, almost all modern desktop motherboards have integrated SATA host adapters.
  • Each SATA cable has two 8-pin connectors (one on each end) and connects one motherboard socket to one hard drive.
  • Unlike IDE (PATA), the same SATA connectors are used on both 3.5" SATA drives (used in desktop and server computers) and 2.5" drives (for portable computers).
  • Note: Do not Fold the SATA cable into 90-degree angle. Otherwise, data loss may occur during transmission of Important data.
4. IDE (PATA):
  • PATA stands for Parallel Advanced Technology Attachment.
  • Parallel ATA (PATA) cables are used for the connection of storage devices such as hard disks, solid-state drives,
  • The ATA interface itself evolved in several stages from Western Digital's original Integrated Drive Electronics (IDE) interface.
  • So it is Called as IDE cable.
  • Each connector has 40 pins (44 pins for the smaller form-factor version used for 2.5″ drives).
  • Note : If two drives are attached to a single cable, one must be configured as Master and the other as Slave by the help of Jumpers.
5. DVI :
  • DVI stands for Digital Visual Interface.
  • This is the successor of VGA designed to provide very high visual quality to digital display devices such as LCD computer displays.
  • It allows you to transmit digital signals between the video source and display using a digital protocol in which the desired illumination of pixels is transmitted as binary data.
  •  There are 3 types of DVI connectors :
1. DVI-A: It used to transmit analog signals (compatible with VGA) to an analog display, such as a CRT monitor or budget LCD.

2. DVI-D: It can transmit only digital signals. It provides direct digital connection between any digital video source (such as PC video card) and digital LCD monitor.

3. DVI-I: It can work with both types of signals (DVI-A and DVI-D). DVI-I cables are capable to transmit either a digital-to-digital signal or an analog-to-analog signals.

6. HDMI :
  • HDMI stands for High Definition Multimedia Interface.
  • It is used for transmission of high-definition video between digital video sources (like PC graphic card or Blue ray player) and digital LCD monitors.
  • HDMI provides the transmission of DVI video signals and audio signals simultaneously. HDMI is backward-compatible with DVI digital video (but only with DVI-D or DVI-I not DVI-A) used on modern computer monitors and graphics cards.
  • There are 4 types of HDMI connectors:
1. Type A: This is the most popular type. The male connector outside dimensions are 13.9 mm x 4.45 mm and has 19 pins. It is also electrically compatible with single-link DVI-D.
2. Type B: This connector dimensions are 21.2 mm x 4.45 mm (it has 29 pins). Type B is electrically compatible with dual-link DVI-D
3. Type C: It is Mini connector intended for portable devices (10.42 mm x 2.42 mm) with 19 pins. Type C is used mostly for connecting digital cameras and camcorders.
4. Type D: A Micro connector with 19 pins and dimensions (2.8 mm x 6.4 mm) resembling a micro-USB connector.
7.RJ 45 :
  • RJ 45 stands for Registered Jack 45 Connector.
  • RJ 45 cables are used to connect computers to local area networks (LAN).
  • There are 2 basic types of RJ 45 cables – Straight-trough and Crossover.
  • A Straight-trough cable is required to connect a computer to hub/switch, while if you want to connect two computers directly you will need a Crossover cable.
  • It is used for connection of a high-speed modem to a telephone network using a keyed 8P8C modular connector.
  • There are many standard designs for these connectors and their wiring are named RJ11, RJ14, RJ21, RJ48, etc.

Thank You...!


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