Automotive EEPROMs San Jose CA

provided by: EDN

With the aim of ensuring reliable operation and long life in the demanding automotive environment, Rohm has introduced a series of EEPROMs that employ a double-cell structure. The BR25Hxx0 devices, which are SPI (serial-peripheral-interface)-bus memories, withstand the voltage surges, static discharge, heat, and vibration that they may encounter in automotive ECUs (engine-control units). Features include guaranteed operation at 125°C, with 20-year data retention at 85°C, 6-kV ESD (electrostatic-discharge) resistance, gold-pad/gold-wire connections, and a double-reset function for high reliability. The devices' high-redundancy circuits and a choice of process technology allow the company to specify a life of 1 million rewrites at 85°C and 300,000 rewrites at 125°C.

EEPROMs are increasingly finding use in critical automotive systems to record, for example, status information. As most users know, the devices also have a wear-out mechanism; charge is transferred by charge tunneling across an oxide barrier. Eventually, on a lifetime-related but somewhat-random basis, the oxide in a cell may break down. Rohm addresses this breakdown by fabricating two identical but separate memory cells for each bit and connecting them in an OR configuration, so that the combined cell will continue to function after a failure.

To protect against error conditions during power-up or voltage dips, the EEPROMs integrate a double-protection circuit comprising a POR (power-on-reset) block that resets during start-up of the power source and a low-voltage write-error-correction circuit that resets the internal circuit and prohibits write operations in low-voltage conditions.

Rohm produces variants with Microwire, I2C (inter-integrated-circuit), and SPI interfaces; the 5-MHz SPI is the fastest. The 14 devices in the family come in 6.2×5×1.71-mm SOP-8 and 6×4.9×1.75-mm SOP-J8 packages and in capacities of 1, 2, 4, 8, 16, and 32 kbits. The memories support high-speed- write and page-write modes.

Rohm Electronics, www.rohm.com.

author: by Graham Prophet

EDN. Copyright © 2008 Reed Business Information, a division of Reed Elsevier Inc. All rights reserved.

Renewable Power Solutions Inc

Solar and wind power design, Engineering, acquisition and installations

408-998-7400
2029 O' Toole Ave
San Jose, CA
www.rps-solar.com

Renewable Power Solutions, Inc.is based in San Jose CA, we provide the best solar electric solution for the future.

Experience.

We have 10+ years of experience in the alternative energy industry using current technologies and state of the art techniques to ensure the best possible solar electric system to meet the needs of our customers.

Our Commitment to You

Power Solutions' commitment to the public is to design and install the solar electric system that best suits your family or business needs. By using our 10 years of experience in the alternative energy industry, current technologies and state of the art techniques we will ensure the best possible solar electric system for you.

Our Principals

We only represent manufacturers that have proven to have excellent customer service, the most reliable products and the least environmental impact during manufacturing. Our 100% customer satisfaction rating is our most important certification. We will not sacrifice it by representing manufacturers that do not share our high standards for sustainability and customer satisfaction.

Our Solution

We would like for everyone to be energy independent and that includes you. Our solution will be presented to you in simple fashion; our engineering team is not allowed to do proposals. We warranty the simplicity of our proposal to make sense environmentally and economically. Your next door neighbors solutions is not necessary the right solution for you. We provide you with one on one attention from the initial visit to the last one.