Dynamic RAM (DRAM) is based on electronic capacitors having charges that must be refreshed periodically, and static RAM
(SRAM) uses electronic transistors that maintain their value once written.
According to the company, the FM22L16 is a 4Mb, 3V, parallel non-volatile RAM in a 44-pin thin small outline plastic (TSOP) package that features fast access and low power consumption.The FM22L16 is pin-compatible with asynchronous static RAM
(SRAM) and targets industrial control systems such as robotics, network and data storage applications, multi-function printers, auto navigation systems and other SRAM-based system designs.
The TDA7550R's program is stored and executed from an internal static RAM
. The program can be loaded from an external memory attached to the EMI interface or via the I2C bus.
Simtek now supplies lead-free packages for its entire family of nonvolatile Static RAM
(nvSRAM) products, complying with the growing worldwide need for an environment-friendly alternative to lead-based packages.
FeRAM combines the fast operating characteristics of dynamic RAM and static RAM
with a flash memory chip's ability to retain data even when an electric device is switched off, it said.
The chip also contains 256 Kbytes of static RAM
and a set of onboard peripherals which include 4 DMA controllers, 3 timer/counters, interrupt controller, SPI, 2 high-performance serial ports, external bhip selects, and a watchdog timer.
The companies say that MRAM offers the best of all memory technologies: the high speed of Static RAM
(SRAM), the storage capacity and low-cost of DRAM, and the non-volatility of Flash memory.
DRAM is slower and is less dependable than Static RAM
(SRAM) because the capacitors cannot maintain an electrical charge and need to be refreshed every millisecond, but it is cheaper, takes up less space and uses less power.