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Compare parallel vs serial data transmission

written 6.9 years ago by teamques10 ★ 69k

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computer organization and architecture

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written 3.0 years ago by teamques10 ★ 69k

•   modified 3.0 years ago

Comparison between Serial and Parallel Data Transmission

Sr. No.	Parameters	Serial Data Transmission	Parallel Data Transmission
1	Definition	In this type of transmission a single link is used to transmit data bits and only one bit is transferred at a time.	In this transmission, data bits are transmitted simultaneously through multiple links, which are placed parallel to each other.
2	Number of bits	Only one bit is transferred at a time.	Eight bits or 1 byte of data can be transmitted simultaneously.
3	Transmission Mode	The sender can receive and send the data simultaneously. Thus, it has a full-duplex transmission mode.	Data can be either sent or received at a time. Thus, it has a half-duplex transmission mode.
4	Complexity of Connections	A serial connection requires fewer cables for interconnection and requires less space. Thus, it is less complex.	A parallel connection may require several devices and cables, which adds to its complexity.
5	Clock Skew	In serial communication this is not an issue.	In parallel communication, the clock skew between different channels can cause an issue.
6	Converters	Serial transmission utilizes converters that enable data conversion from parallel to serial type.	Parallel transmission requires no such data converters.
7	Transmission Distance	Serial transmission does not witness any electromagnetic interference, hence it is ideal for long-distance data transmission.	Parallel communication may witness electromagnetic interference in long-distance transmission, hence used in short-distance transmission.
8	Disturbances	Zero or very negligible disturbance.	It suffers from disturbance.
9	Number of communication channels	Only one channel is required.	N number of communication channels is required.
10	Cable Lengths	The serial communication cables are longer, thinner, and economical	The parallel communication cables are used to run to several kilometers.
11	Bandwidth	In this bandwidth is higher.	In this bandwidth is lower.
12	High Frequency	This can work at high frequency.	This cannot work at high frequency.
13	Speed Performance	Since the serial transmission transmits only a single bit per clock, the overall performance and speed are lower than that of parallel transmission.	Since the parallel transmission transmits about eight bits per clock, the overall performance and speed are much higher than that of serial transmission.
14	Affordability	serial communication is used in computer networks. But, the integrity and complexity here is easily made out. Hence, serial communication is cheaper compared to parallel communication.	Parallel communication has been used for integrated circuits as well as RAM and peripheral buses. It incurs much more cost. Hence, it is a costly option as compared to serial transmission.
15	Applications	Computer to computer, Computer, and modem.	Computer to a printer, Hard-disk and motherboard

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