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Freescale Integrates Support for Stringent System-Level Functional Safety with New Analog System Basis Chips

Freescale Semiconductor (NYSE: FSL) is helping automotive and industrial system designers reduce the cost and complexity of designing applications required to meet functional safety standards. Today, the company announced new system basis chips (SBCs) that provide support for stringent system-level functional safety integrated with a high efficiency DC/DC switching regulator for reducing overall energy consumption.

Developed in accordance with key functional safety requirements, Freescale’s new MC33907 and MC33908 SBCs work seamlessly with 32-bit microcontrollers (MCUs) like Freescale’s Qorivva series devices to provide a scalable power supply solution that combines power management and communications with integrated functional safety for a broad range of power segmentation architectures. For systems designers, the result is an easy-to-use software/hardware solution that supports the specific functional safety requirements of multiple applications while simplifying designs, minimizing use of external components and reducing bill-of-materials costs.

Featuring the efficiency of a dual DC/DC switching regulator architecture and unique, low-voltage operation down to 2.7 V supply, the MC33907 and MC33908 products supply power to microcontrollers and other system loads while maintaining system operation during power brown-out events such as during an automotive cranking pulse. Ultra-low power modes and innovative wake up capabilities reduce system quiescent current down to 30 µA, limiting system standby energy consumption and battery discharge. The devices’ configurable voltage regulator capabilities enable design of scalable platform solutions optimized for 32-bit MCUs supporting functional safety certifications across multiple vehicles or industrial applications.

“Achieving functional safety compliance can be difficult and costly,” said James Bates, general manager and senior vice president of Freescale’s Analog and Sensors Group. “Freescale makes it quicker and easier to achieve compliance with these new system basis chips, which are designed to meet ISO 26262 ASIL D -- the most stringent functional safety requirement, as well as the latest automotive OEM requirements for ESD and electromagnetic compatibility.”

The functional safety of the MC33907 and MC33908 products has been validated by a prestigious third-party certification organization, which found their safety architecture and approach to surpass ISO 26262 ASIL-D for safety applications. Both system basis chips are part of the Freescale SafeAssure program, which offers a broad solution set of MCUs, sensors and analog ICs, as well as support for functional safety application design that includes training, safety documentation, and software and technical support.

While total system current output capacity is 2 A for both devices, the MC33908 supplies a core current up to 1.5 A while the MC33907 is capable of 0.7 A. Along with the integrated and independent safety measures to reduce common cause failures, the devices also feature a robust CAN physical layer compliant with ISO 11898-2-5 and a serial peripheral interface to allow control and diagnostics for the target MCU.

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Additional features include:

  • Innovative architecture allowing independent monitoring of safety critical parameters (supply voltage, timing, MCU and analog IC monitoring)
  • Architecture and concept assessment fit for ASIL D applications
  • Independent fail-safe state machine supporting the most stringent functional safety standards
  • Flexible DC/DC buck pre-regulator with optional boost to fit with LV124
  • Multiple regulated supplies up to 2 A
  • Low-power modes with 30 µA quiescent current
  • Analog multiplexer and battery sensing before reverse battery diode to quicken system reaction during low voltage operations
  • Advanced watchdog combined with secured SPI interface
  • High ESD robustness for system interface pins up to +/-8kV gun stress according to IEC61000-4-2 and ISO10605.2008 standards
  • Robust CAN communications physical interface with EMI/ESD performance up to +/-12kV gun stress according to IEC61000-4-2 and ISO10605.2008 standards

Development support

Freescale provides a robust lineup of hardware and software to support the MC33907 and MC33908 products, including:

  • The KIT33907AEEVB evaluation board at $150.00 (USD)
  • The KIT33908AEEVB evaluation board at $150.00 (USD)
  • The KIT33908MBEVBE mother board at $350.00 (USD)
  • The KITMPC5643DBEVM daughter board at $150.00 (USD)
  • The KIT908-5643EVM evaluation system at $550.00 (USD)

Availability and pricing

The MC33907 and MC33908 SBCs are available now for a suggested resale price starting at $2.49 and $2.55 (USD) respectively in 10,000-piece quantities. Please contact Freescale Sales for additional quantities.

Robust and reliable analog performance

The majority of Freescale analog products meet critical industrial market requirements, including operation across extended temperature ranges. These products are designed and manufactured with rigorous process controls, and qualified using industry standard methodologies designed to yield defect rates in line with the stringent requirements of the automotive market. The MC33907/8 devices, in addition to most of Freescale’s analog products for industrial, are included in Freescale’s product longevity program, which provides assurance of supply for a minimum of 10 or 15 years, depending on the product, from the time of launch. For terms and conditions, and to see a list of participating Freescale products, visit www.freescale.com/productlongevity.

Freescale SafeAssure program: Functional Safety. Simplified.

The Freescale SafeAssure functional safety program is designed to help system manufacturers more easily achieve system compliance with functional safety standards for automotive and industrial markets including: International Standards Organization (ISO) 26262 and International Electrotechnical Commission (IEC) 61508. The program highlights Freescale solutions – hardware and software – that are optimally designed to support functional safety implementations and come with a rich set of enablement collateral. For more information, visit www.freescale.com/SafeAssure.

About Freescale

Freescale Semiconductor (NYSE: FSL) is a global leader in embedded processing solutions, providing industry leading products that are advancing the automotive, consumer, industrial and networking markets. From microprocessors and microcontrollers to sensors, analog integrated circuits and connectivity – our technologies are the foundation for the innovations that make our world greener, safer, healthier and more connected. Some of our key applications and end-markets include automotive safety, hybrid and all-electric vehicles, next generation wireless infrastructure, smart energy management, portable medical devices, consumer appliances and smart mobile devices. The company is based in Austin, Texas, and has design, research and development, manufacturing and sales operations around the world. www.freescale.com

Freescale, the Freescale logo, Qorivva, SafeAssure and the SafeAssure logo are trademarks of Freescale Semiconductor, Inc., Reg. U.S. Pat. & Tm. Off. All other product or service names are the property of their respective owners. © 2014 Freescale Semiconductor, Inc.

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