The document discusses Random Access Memory (RAM), detailing its importance in digital electronics for storing data and instructions. It contrasts two primary types of RAM: Static RAM (SRAM), which offers fast access but has higher power consumption and costs, and Dynamic RAM (DRAM), which has slower access speeds but greater storage capacity and efficiency. Overall, SRAM is suited for applications requiring quick data retrieval, while DRAM is commonly used as main memory in computers.

1. RAM
RAM, or Random Access Memory, is a crucial
component of digital electronics. It's a type of
memory that allows data to be accessed and
modified in any order. RAM is used for storing data
and instructions that the CPU needs to access
quickly.

2. TYPES OF RAM
Dynamic RAM (DRAM)
A transistor and capacitor make up each memory cell, and the
capacitor stores data. DRAM is often used as the main
memory in computers.
Static RAM (SRAM)
Four to six transistors make up each memory cell. SRAM keeps
data in memory as long as the system has power, unlike
DRAM, which needs to be refreshed periodically

3. STATIC RAM (SRAM)
1 Fast Access
SRAM is known for its fast access
speeds, making it suitable for
applications requiring quick data
retrieval.
2 High Power Consumption
SRAM cells constantly consume power
even when idle, leading to higher
energy consumption.
3 Smaller Storage Capacity
SRAM generally has a smaller storage
capacity compared to DRAM due to its
more complex design.
4 Higher Cost
The complexity of SRAM design results
in higher manufacturing costs, making
it more expensive than DRAM.

4. DYNAMIC RAM (SRAM)
1 Slow Access
DRAM has slower access speeds
compared to SRAM due to the need for
refresh cycles.
2 Low Power Consumption
DRAM consumes less power compared
to SRAM because it stores data in
capacitors.
3 Larger Storage Capacity
DRAM can store a larger amount of
data than SRAM due to its simpler cell
design.
4 Lower Cost
DRAM's simple design results in lower
manufacturing costs, making it more
cost-effective.

5. Feature SRAM DRAM
Access Speed Fast Slow
Power Consumption High Low
Storage Capacity Small Large
Cost High Low
Applications
Cache memory,
Embedded systems
Main memory,
Graphics memory
MPARISON OF SRAM AND DRAM

6. STATIC
RAM
LOGIC
DIAGRAM
USING BJT
USING
MOSFET
A static RAM essentially contains an array of flip-flops, one for each
stored bit. Data written into a flip-flop remains stored as long as a d.c.
power is maintained. The memory capacity of a static RAM varies from 64
bits to 1 Mega bit.

7. DYNAMIC
RAM
The DRAM stores its binary information in the form of electric charges
on capacitors. Data are stored as charge on every capacitor, which must
be recharged of refreshed thousands of times every second in order to
retain the stored charge. These memory devices make use of an
integrated MOS capacitor as basic memory cell instead of a flip-flop.

8. ROW AND COLUMN
SELECTION

9. BASIC STRUCTURE
SRA
M
DRA
M