Connect with us

Hi, what are you looking for?

New Products

Toshiba Develops Worlds Highest-Bandwidth, Highest Density Non-Volatile RAM

549773.jpg

Toshiba Corporation (TOKYO:6502) today announced the prototype of a new FeRAM (Ferroelectric Random Access Memory) that redefines industry benchmarks for density and operating speed. The new chip realizes storage of 128-megabits and read and write speeds of 1.6-gigabytes a second, the most advanced combination of performance and density yet achieved. Full details of the new FeRAM will be presented this week at the International Solid-State Circuits Conference 2009 (ISSCC2009) in San Francisco, USA.

The new FeRAM modifies Toshiba’s original chainFeRAM™ architecture, which significantly contributes to chip scaling, with a new architecture that prevents cell signal degradation, the usual tradeoff from chip scaling. The combination realizes an upscaled FeRAM with a density of 128-megabit. Furthermore, a new circuit that predicts and controls the fluctuations of power supply supports high-speed data transfers. This allowed integration of DDR2 interface to maximize data transfers at a high throughput at low power consumption, realizing read and write speeds of 1.6 gigabytes a second. In developing the new FeRAM, Toshiba broke its own record of 32-megabit density and 200-megabit data transfers, pushing performance to eight times faster than the transfer rate and density of the previous records and the fastest speed of any non-volatile RAM.

Image of new FeRAM chip

FeRAM combines the fast operating characteristics of DRAM with flash memory’s ability to retain data while powered off, attributes that continue to attract the attention of the semiconductor industry. Toshiba will continue R&D in FeRAM, aiming for further capacity increases and eventual use in a wide range of applications, including the main memory of mobile phones, mobile consumer products, and cache memory applications in products such as mobile PCs and SSDs.

Outline of New Technology

1. Improvement of ChainFeRAM™ architecture

ChainFeRAM™ in the earlier generation of 64-megabit FeRAM employed a data-line design in which neighboring data-lines operated in sequence: one is off when the other is on. This allowed off lines to provide a noise barrier between on lines, contributing to chip scaling and fine performance. Previous chain architecture collected four data-lines but Toshiba has successfully increased the number of data-lines to eight, which led to a decrease in the total chip area.

2. New architecture inhibits signal degradation

Advertisement. Scroll to continue reading.

Chip scaling causes signal degradation as the stored polarization of memory cell gets smaller. By shortening the data-line pitch and using chain architecture to decrease the number of memory cells connecting to sense amplifiers , Toshiba maintained the same cell signal level without any chip area penalty. Furthermore, improvement of the sensing technique reduced the parasitic capacitance and realized a reading signal of 200mV, sufficient for practical application.

3. DDR2 Interface

A circuit that can predict power fluctuation during read/write and control the power supply is newly added. This new circuit rapidly realizes the voltage required for read and write, allowing the new FeRAM to add a DDR2 interface and opening the way to practical use.

Main specifications:

Process 130 nanometer CMOS
Density 128 megabits
Cell size 0.252 m2
Read/ write speed (bandwidth) 1.6 gigabytes/second (DDR2 interface)
Cycle time 83 nanoseconds
Access time 43 nanoseconds
Power supply 1.8V

ChainFeRAM
New ChainFeRAM™ architecture
Click to comment

Leave a Reply

Your email address will not be published. Required fields are marked *

Advertisement

Our Reviews

CD Players

For $1000 this versatile CD player can function as a Transport or DAC. Plus it plays CDs that sound better than streaming.

D/A Converters

A portable USB DAC that plugs into your smartphone to improve the sound quality of headphone listening on-the-go.

Reviews

Review By Maurice Jeffries New Heavyweight Contenders! My first encounter with DS Audio’s fascinating line of optical cartridges and matching phono energizers (the term...

Over-Ear Headphones

Portable USB DACs are a new category that can take well regarded headphones from Meze Audio and Audeze to the next level when listening...

Integrated Amps & Stereo Receivers

At $7499, Yamaha's flagship stereo integrated amplifier for 2020 pays homage to the company's heritage. Check out part 1 of our review.

Over-Ear Headphones

First impressions of a portable headphone combo for audiophiles using the Clarus CODA USB DAC with the Audeze LCD-1 planar-magnetic over-ear headphones.

You May Also Like

Articles

A day in the life with open baffle loudspeakers and full range drivers from Linear Tube Audio, Omega Speakers, and Spatial Audio.

New Products

Four piece sound bar system includes SR2 wireless surround speakers and React Sub with remote and Alexa voice control for $647.

D/A Converters

Feature packed $499 DAC and Headphone Amplifier adds native MQA support and processes hi-res audio up to 32-bit/768kHz (PCM) and DSD512.

CD Players

For $1000 this versatile CD player can function as a Transport or DAC. Plus it plays CDs that sound better than streaming.

Advertisement

ecoustics is the unbiased resource for the latest technology news, coolest gadgets, and best consumer electronics. Plus get product reviews, roundups and deals from all over the web on everything electronic. Read more



Copyright © 1999-2021 ecoustics | Disclaimer: ecoustics may earn a commission when you buy through links on our site.