# Memory (SRAM)
SRAM uses flip flop based latching circuitary to store each bit. Nearly all SRAM either use 4 Transistor or 6 Transistor memory cell.

## Types of SRAM
1. **Synchronous SRAM:** Synchronized with an external signal called clock. The device will read and write information into the memory only on particular states of the clock
2. **Asynchronous SRAM:** Does not depend on the state of a clock. It will begin to read/write information into the memory as soon as it receives the instructions to do so

## SRAM Vs. DRAM
* SRAM don't require periodic refresh like DRAM, hence offer better performance
* A DRAM cell is composed of an access transistor and a capacitor
* Data is stored in capacitor as electrical charge, but the electrical charge leaks over time
* Therefore, DRAM must be refreshed periodically to preserve the stored data
* The refresh negatively impacts DRAM performance and power dissipation
* Due to this, SRAM are also typically faster and have lower power consumption than DRAMs