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Related to F-RAM: Ferroelectric RAM


(1) (fram) (FRiend spAM) Jokes and information forwarded directly to friends via e-mail 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 ?
The 1 Mb parallel asynchronous interface F-RAM device in a 44-pin TSOPII package and the extended temperature range of -40?
F-RAM memory cells inherently feature 10 trillion cycle endurance, fast single-cycle and symmetrical read/write speeds, low energy consumption, gamma radiation tolerance, and immunity to electromagnetic interference.
Ramtron places initial F-RAM product orders on ROHM's production-ready F-RAM line
In addition, MaxArias wireless F-RAM memory products, like the WM72016 included with the kit, are capable of capturing large block writes -- up to 127 words-- without loss of data integrity or compromising read/write speed and distance.
The Ultra Low Energy F-RAM memories achieve levels of power consumption that are not possible with older and more power hungry nonvolatile memory technologies, such as EEPROM.
Pioneered by Ramtron, F-RAM offers unique features relative to other semiconductor technologies.
This milestone marks the first commercial shipment of 3-volt F-RAM devices built on our new F-RAM manufacturing line in Burlington," said Eric Balzer, Ramtron's CEO.
Jim's experience as a senior executive combined with his deep knowledge of international foundry operations and technology development will be of great value to our team as we optimize our manufacturing processes and drive the adoption of our F-RAM enabled semiconductor products," said Eric Balzer, Ramtron's CEO.
Announced pre-qualification sampling of a 64-Kilobit F-RAM product built on the company's new manufacturing line in Burlington, VT
Zimmer will oversee Ramtron's worldwide sales organization for all Ramtron product lines including high-performance F-RAM memory, wireless memory, and integrated products.
Cypress, the Cypress logo, PSoC and CapSense are registered trademarks and EZ-BLE, PRoC, PSoC Creator, CySmart, F-RAM and Traveo are trademarks of Cypress Semiconductor Corp.
LTD (KYEC) was selected to expand the test capacity for Ramtron's line of F-RAM products