CPU Companion Chips Add FRAM Storage And Peripheral Support

Dec. 4, 2003
By combining nonvolatile storage and logic functions, a family of ferroelectric-based processor companion chips makes multifunction support a reality for embedded processors. Ramtron's FM3104, 3116, 3164, and 31256 include 4, 16, 64, or 256 kbits of...

By combining nonvolatile storage and logic functions, a family of ferroelectric-based processor companion chips makes multifunction support a reality for embedded processors. Ramtron's FM3104, 3116, 3164, and 31256 include 4, 16, 64, or 256 kbits of nonvolatile ferroelectric RAM (FRAM). They also pack a real-time clock, a processor supervisor, and additional peripheral functions.

According to the company, these processor companion devices are the most integrated FRAM products in the field. They provide some of the most commonly needed system functions for a variety of automotive, consumer, communications, industrial, metering, and computing applications.

The processor supervisor block boasts a programmable low-VDD reset, a programmable watchdog timer, and a manual reset function. Other peripherals include a nonvolatile event counter and a lockable 64-bit serial number area. A general-purpose comparator can be used for an early power-fail (nonmaskable) interrupt or another purpose. The nonvolatile storage and peripheral functions share a common interface and combine to fit in a tiny 14-lead small-outline IC package. A standard two-wire bus accesses the memory and controls all functions.

Each device operates from 2.7 to 5.5 V. Samples of the FM3104, 3116, 3164, and FM31256 are immediately available. In quantities of 10,000 units, the companion chips sell for $2.04, $2.34, $2.75, and $3.76, respectively.

Ramtron Inc.www.ramtron.com

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About the Author

Dave Bursky | Technologist

Dave Bursky, the founder of New Ideas in Communications, a publication website featuring the blog column Chipnastics – the Art and Science of Chip Design. He is also president of PRN Engineering, a technical writing and market consulting company. Prior to these organizations, he spent about a dozen years as a contributing editor to Chip Design magazine. Concurrent with Chip Design, he was also the technical editorial manager at Maxim Integrated Products, and prior to Maxim, Dave spent over 35 years working as an engineer for the U.S. Army Electronics Command and an editor with Electronic Design Magazine.

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