Also found in: Dictionary, Thesaurus, Medical.
Related to F-RAM: Ferroelectric RAM


(1) (fram) (FRiend spAM) Jokes and information forwarded directly to friends via email as well as social media notifications every time people post something they think is memorable. See spam.

(2) (Ferromagnetic RAM) A non-volatile memory that records bits on a magnetic surface. See MRAM.

(3) (Ferroelectric RAM) A non-volatile, random access memory technology from Ramtron International Corporation, Colorado Springs, CO (www.ramtron.com). With product shipping since 1993, F-RAM was the first commercial non-volatile RAM on the market using standard CMOS fabrication. It was initially designed as a high-performance alternative to EEPROM memory with write speed that is orders of magnitude faster and virtually unlimited write cycles. Having the attributes of RAM and the non-volatility of flash, F-RAM may eventually replace flash, DRAM and SRAM.

Polarization in a Crystal
F-RAM uses a ferroelectric capacitor composed of a crystal made up of lead and oxygen atoms plus zirconium or titanium. The crystal has two stable states. When an electric field is applied, the zirconium or titanium atom changes position. The read circuit detects the polarity of the atom as a difference in voltage, which determines the 0 or 1.

The ferroelectric name was chosen because the hysteresis characteristic of the capacitor's charge is similar to ferromagnetic materials. It is somewhat misleading because the capacitor is not made of iron (ferrous), and it is not influenced by magnetic fields. See future memory chips.

The Perovskite Crystal
Ferroelectric capacitors use perovskite crystals, which are found in certain rocks. Named after Russian mineralogist L. A. Perovski, the red dot in the middle is the titanium or zirconium atom, which changes its position. (Image courtesy of Ramtron International Corporation, www.ramtron.com)

Easy Integration
Providing the fastest non-volatile memory in this microcontroller (MCU), a small amount of F-RAM is integrated on this chip with SRAM and flash memory, input/output and processing circuits. (Image courtesy of Ramtron International Corporation, www.ramtron.com)

Just A Few Bits
These Ramtron chips provide non-volatile storage of two or four F-RAM bits in order to maintain the state of a single switch or relay (top) or an LED (bottom). When power is turned back on, these "Nonvolatile State Saver" ICs provide the last known state. (Image courtesy of Ramtron International Corporation, www.ramtron.com)
References in periodicals archive ?
Our new Excelon LP F-RAMs use 200 times less energy than EEPROMs and 3,000 times less than NOR Flash, while providing virtually infinite endurance in a small form factor, making them a perfect match for these applications.
"Ramtron's F-RAM based semiconductor products complement Future's offerings by providing a high-performance and green nonvolatile memory alternative," said Dragos Chima, Future marketing director for memory products.
Ramtron International Corporation (Nasdaq:RMTR) announced Monday that SBS Science and Technology Co Ltd has selected the FM22L16 4Mb F-RAM (ferroelectric random access memory) for use in a solid state disk data storage device.
Its broad, differentiated product portfolio includes NOR flash memories, F-RAM and SRAM, Traveo microcontrollers, PSoC programmable system-on-chip solutions, analogue and PMIC Power Management ICs, CapSense capacitive touch-sensing controllers and Wireless BLE Bluetooth Low-Energy and USB connectivity solutions,
Additional SPI, I2C and parallel interface V-Family F-RAM products are planned for introduction in 2008.
Its has 4, 16, 64 or 256 Kb of non-volatile F-RAM memory, a high-speed two-wire interface and integrated support/peripheral functions for advanced systems.
Cypresss NVRAM portfolio, which includes Ferroelectric-RAM (F-RAM) and nonvolatile static RAM (nvSRAM) devices, offers reliable protection of critical data during a power failure.
added a 4 Kb, 5V F-RAM memory device to its Grade 1 AEC-Q100-qualified automotive product line.