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4bit FRAM-based devices retain logic states without power

Posted: 11 Sep 2007 ?? ?Print Version ?Bookmark and Share

Keywords:nonvolatile state saver? retain logic states without power? FRAM?


Ramtron International Corp. has expanded its nonvolatile state saver family with the quad state savera 4bit FRAM-based device that retains logic states without power and restores outputs automatically upon power up. Any change in state is automatically recorded in the nonvolatile ferroelectric latch, which is possible due to the fast writes, low power and extremely high endurance of FRAM technology.

The FM111x 4bit state savers are available in three variations: the FM1110, which operates at 5V, and the FM1112 and FM1114, which operate at 3V.

The devices are simple to use like a dual latch or D-type flip-flop. The FM111x operates like a conventional logic building block, but stores and retains the logic state in the absence of power. This simplifies the design of system control functions in applications such as switch interfaces, shift registers, relay drivers, LED drivers, recording error flags, power down state detection, tamper indicators, door open indicators, motor on/off control, DIP switch replacement, jumper replacement and other nonvolatile logic circuits.

"The FM111x is a natural extension of the 2bit state saver, and was developed for our customers whose applications require more data," said Craig Taylor, director of technical marketing, Ramtron. "The 4bit state saver is the second product line in an evolving family of truly novel products. FRAM technology uniquely enables this capability due to its fast write time, low power and virtually unlimited endurance."

The low-power nonvolatile state saver is a logic building block that provides continuous access to nonvolatile system settings without reading a memory. It enables storage of signals that may change frequently and without notice. It also allows the nonvolatile storage of system settings without the system overhead of a serial memory.

The FM1110 operates from 4.5-5.5V, the FM1112 operates from 2.7-3.6V with a low standby current of less than 10?A, and the FM1114 operates from 2.7-3.6V and boasts an ultralow standby current of less than 0.5?A. All devices change state continuously at 1kHz, offer an unlimited number of state changes, operate over the industrial temperature range of -40C to 85C.

Housed in RoHS-compliant 16-pin "green" QFN packages, engineering samples of the FM111x are available now. Unit pricing starts at 70 cents for quantities of 10,000 units.

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