ROHM Semi claims first CXPI-compatible transceiver IC

Date
11/06/2015

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The BD41000FJ-C enables multiplexing between ECUs, contributing to decreased vehicle weight and improved fuel efficiency by reducing the number and size of wiring harnesses

ROHM has recently announced the availability of a transceiver IC compatible with the new low-speed, low-cost CXPI communication protocol for use in body control applications, including steering switch, AC, and instrument panel systems. The BD41000FJ-C enables multiplexing between ECUs, contributing to decreased vehicle weight and improved fuel efficiency by reducing the number and size of wiring harnesses. In addition, low quiescent current (3uA typ.) and high ESD resistance (±8kV, IEC61000-4-2) make it possible to achieve low-power, high-reliability CXPI communication.

In recent years the continuing demand for increased fuel efficiency makes it necessary to not only minimize system power consumption through electronic control but reduce vehicle weight as well by using lighter components, including wiring harnesses.

To decrease weight, many systems adopt LIN for multiplex communication. However, with LIN it is difficult to achieve sufficient reliability and communication response when multiplexing in HMI (Human Machine Interface) applications such as wipers, lights, and steering switches.

In response, JASO (Japanese Automotive Standards Organization) an automotive standardization organization established by JSAE (Society of Automotive Engineers of Japan), developed the next-generation automotive communication protocol CXPI to reduce the number and weight of wiring harnesses by making multiplexing possible even in advanced, multifunction HMI systems.

Subsequently, as a leading semiconductor manufacturer, in 2012 ROHM contributed to the standardization of CXPI while leveraging cutting-edge power BiCDMOS processes and advanced analog design technology to develop the world’s first CXPI transceiver IC.

Key Features

1. CXPI compatibility ideal for HMI systems
Although LIN is often used for body control, it is often difficult to achieve sufficient performance and reliability

in HMI applications that require instantaneous response.
In contrast, the BD41000FJ-C is compliant with the CXPI standard established by JSAE, enabling highly responsive, reliable multiplex communication even in HMI systems, reducing vehicle weight and contributing to greater fuel efficiency.

2. Low 3uA quiescent current meets automotive requirements
Market-proven circuit technology is utilized to achieve a quiescent current of 3uA (typ.), ensuring suitability with automotive applications. As a result battery load is minimized during non-operation, contributing to greater energy savings.

3. High reliability ensured even in severe automotive environments
ROHM leverages advanced BiCDMOS processes and proven analog design technology to provide low output noise with high ESD resistance (±8kV, IEC61000-4-2). This provides superior reliability, enabling use even under harsh environments.

Availability: February 2016 (Samples), May 2016 (OEM Quantities)

ROHM Semiconductor

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