Different types of RAM and its function

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RAM or Random Access Memory is a data storage card that is used in most devices, like computers, mobile phone, tablets, etc. there are different types of RAM which are classified as per their uses.

RAM is commonly classified into two broad categories;

  • Static RAM or SRAM
  • Dynamic RAM or DRAM

Static Random-Access Memory

To store the data in bits, SRAM uses bistable flip-flops. Once the data is burned on SRAM, it is stored. There are three ways in which the data is stored in SRAM, operates for operation.They are Standby, Reading and Writing.

Types of Static Random-Access Memory

Depending on Data Storage

  • Non-volatile SRAM: Data is stored, also when the power is off, so that critical information is secured.
  • Asynchronous SRAM: The data can be stored in the range of 4Kb to 64 Mb and it used as a main memory component in many electronic devices.

Depending on Transistor

  • Bipolar Junction Transistor: It is used in Transistor-Transistor Logic (TTL) and Emitter-Coupled Logic (ECL) devices.
  • Metal Oxide Semiconductor Field Effect Transistor (MOSFET): It is used in Complementary metal-oxide-semiconductor (CMOS) technology based applications.

Depending on Features

  • Quad Data Rate SRAM: In one complete clock cycle, two words of data is transferred.
  • DDR SRAM: Common I/O which is used for data transfer.

Depending on Flip-Flop

  • Binary SRAM:
  • Ternary SRAM:

Uses of Static Random-Access Memory

  • Computers
  • Microprocessors
  • Digital Signal Processing (DSP) circuits
  • LCD screens and printers
  • Hard disk and router buffers
  • Digital cameras
  • Synthesizers
  • Cell phones

Dynamic Random Access Memory

Types of Dynamic Random-Access Memory


The changes in the input is apparent and quickly reacted by SDRAM. It is synchronized with the computer’s system.


DDR2 SDRAM is an Integrated Circuit (IC) chip, which stores data, in a computer. The data transfer rate of DDR SDRAM is 1,600 megabytes per second. It is used in computers and mobile phones.


DDR23 SDRAM is the upgraded version of DDR SDRAM. The maximum data transfer rate of DDR2 SDRAM is 3,200 megabytes per second.


The data transfer rate of this RAM is 6,400 megabytes per second, which is twice that of DDR2 SDRAM.


It is the second generation high bandwidth interface, which is developed with the hope of releasing in 2012.


DRDRAM6 or RDRAM is a type of SDRAM which known for its high latency, heat output, complexity, and low performance in exchange for its high price. It is used in video game controls and in video cards.


PSRAM7 supports the combined benefits of DRAM (high density) and true SRAM (ease of use).


This type of RAM is mainly used in networking and caching applications.


EDO9 DRAM can also be called Hyper Page Mode enabled DRAM, provided improved performance by allowing the consecutive operations to overlap.


SGRAM10 is used in graphic adaptors and it can open two memory pages at a time.


With FPM DRAM11 the reading and writing of data is quick. This increases the performance of the machine

Long Forms of the Abbreviations

  • SDRAM – Synchronous Dynamic Random-Access Memory
  • DDR SDRAM – Double Data Rate Synchronous Dynamic Random-Access-Memory
  • DDR2 SDRAM – Double Data Rate Type Two Synchronous Dynamic Random-Access Memory
  • DDR3 SDRAM – Double Data Rate Type Three Synchronous Dynamic Random-Access Memory
  • DDR4 SDRAM – Double Data Rate Type Four Synchronous Dynamic Random-Access Memory
  • DRDRAM – Direct Rambus Dynamic Random-Access Memory
  • PSRAM – Pseudostatic Random-Access Memory
  • RLDRAM – Reduced-Latency Dynamic Random-Access Memory
  • EDO DRAM – Extended Data Out Dynamic Random-Access Memory
  • SGRAM – Synchronous Graphics Random-Access Memory
  • FPM DRAM – Fast Page Mode Dynamic Random-Access Memory

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