Static Random-Access
Memory(SRAM)
SRAM
SRAM stands for Static Random-Access Memory.
It's a type of volatile memory that stores data temporarily while a
computer is on and needs constant power to maintain the stored
information
. SRAM is faster and more expensive than DRAM (Dynamic Random-
Access Memory) but requires less power and is typically used in cache
memory for CPUs and other applications where speed is critical.
STRUCTURE
SRAM consists of flip-flops, which are bistable multivibrator circuits capable of
storing one bit of data each. Each flip-flop typically consists of four to six transistors.
These transistors are arranged in a way that allows the stored data to be accessed
and modified quickly
OPERATION.
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SRAM is called "static" because it doesn't need to be refreshed like DRAM.
Once data is written to an SRAM cell, it remains there until it is overwritten or
the power is turned off. This makes SRAM faster than DRAM for accessing data.
TYPES OF SRAM
Asynchronous SRAM (ASRAM): This is the most basic type of SRAM, where the memory
access is controlled by separate control signals (Read and Write) without a clock signal.
.Synchronous SRAM (SSRAM): This type of SRAM uses a clock signal to synchronize the
read and write operations, allowing for higher speed and efficiency compared to
asynchronous SRAM.
low Power SRAM (LPSRAM): This type of SRAM is designed to operate at lower power
consumption levels, making it suitable for use in battery-powered devices.
Quad Data Rate SRAM (QDR SRAM): QDR SRAM is a high-performance SRAM that can
perform two read and two write operations simultaneously, providing high-speed access to
data.
Pipelined SRAM: This type of SRAM uses a pipeline architecture to overlap the read and
write operations, increasing the overall speed of the memory.
Applications ADVANTAGES
SRAM is faster than DRAM because it does not
SRAM is commonly used in applications require refreshing. It is also more reliable and
where speed is critical, such as cache consumes less power than DRAM. Additionally, SRAM
memory in CPUs and high-performance can be accessed randomly, meaning that any memory
graphics cards. It is also used in networking cell can be accessed directly without having to read
devices, where fast access to routing tables through the entire memory sequentially.
is important.
DISADVANTAGES
SRAM is more expensive and less dense than
DRAM, meaning that it takes up more space on a
chip and is more costly to produce. This limits its use
in applications where cost or size is a concern.
In summary, SRAM is a type of memory that is fast,
reliable, and does not require refreshing. It is commonly
used in applications where speed and reliability are more
important than cost or size.
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