SRAM: Cell Design, Operation, Types, and Applications

All flashcards

Why is SRAM classified as volatile memory?

It normally loses stored data when power is removed.

What is SRAM's typical density and cost trade-off compared with DRAM?

SRAM uses more silicon area per bit, so it is less dense and more expensive.

Where is SRAM commonly used in a processor?

In CPU caches, registers, and register files.

What does a non-volatile SRAM (nvSRAM) provide?

SRAM functionality combined with a way to retain data without power.

What is the historical significance of the Intel 3101?

Intel introduced it in 1969 as a 64-bit bipolar SRAM chip.

Quiz questions

1. How does a typical SRAM read circuit determine the stored bit?Answer: A differential sense amplifier detects the voltage difference between paired bit lines.
2. What must write drivers do to update an SRAM cell reliably?Answer: Drive the bit lines strongly enough to overcome the cell's existing state.
3. In SRAM specifications, what does access time measure?Answer: The delay from valid address inputs until valid output data appears.
4. How does asynchronous SRAM coordinate its data transfers?Answer: Address and control signals govern transfers independently of clock frequency.
5. Which characteristic is associated with bipolar SRAM compared with MOSFET SRAM?Answer: It can offer very high speed but tends to consume more power.