Mission Viejo, CA (August 19, 2011) – Holt Integrated Circuits, a world leader in data bus IC’s for commercial and military avionics, announced today the first fully integrated, single chip, ARINC 717 protocol IC, the HI-3717. The HI-3717 communicates with an external microcontroller via a 4-wire Serial Peripheral host Interface (SPI) and provides selectable Harvard Bi-Phase (HBP) and Bi-Polar Return-to-Zero (BPRZ) channels with encoders/decoder and dedicated line drivers and line receivers for direct connection to the ARINC 717 bus. The device is targeted at digital flight data recorder applications and may be used in the recorder itself, the data acquisition unit or the quick access recorder.
The HI-3717 includes an on-chip DC/DC converter, requiring only a single 3.3V supply to operate. All voltage levels necessary for the BPRZ and HBP channels are generated on-chip. There are 9 programmable bit rates, corresponding to 32, 64, 128, 256, 512, 1024, 2048, 4096 and 8192 words/sec. The receive and transmit channels both have 32-bit x 12 word FIFOs, allowing the external host to take a “hands off” approach and perform other tasks without the need for frequent buffer servicing. Dedicated FIFO status flags are provided in both registers and external pins. Additional features include programmable slew rates on the transmitters (1.5µs, 7.5µs and 10µs), dedicated SPI instruction set, digital transmitter outputs and frame / subframe word count indicator.
The HI-3717 uses a proprietary synchronization method which guarantees the part will rapidly attain correct synchronization, even if additional or false sync words are embedded in the data stream. If a device loses synchronization for any reason, it will automatically restart the synchronization process and immediately try to re-acquire sync. Three modes of operation are possible. The first, Flight Mode, is the default, which requires detection of all four consecutive sync words in the correct order and time. The second mode, Test Mode, will declare sync when any two consecutive sync words are detected and finally a third mode allows synchronization to be turned off, allowing all received data to be stored in the receive FIFO. The three modes provide maximum flexibility for both in-flight and test equipment applications.
“The HI-3717 is the first single chip ARINC 717 solution which automatically handles all aspects of the ARINC 717 protocol,” said Anthony Murray, Director of Business Development at Holt. “This single device greatly reduces system size and cost, simplifying the design and providing a more efficient path to DO-254 or DO-178 system certification.”
The HI-3717 is available in a very small 7mm x 7mm, 44-pin, QFN package or a 44-pin PQFP. Datasheet, samples and a demonstration kit are available upon request.
To request information on Holt’s ARINC 429, CAN, MIL-STD-1553 and other product lines, readers should contact Holt at (949) 859-8800, by e-mail at info@holtic.com, or visit the Holt website at www.holtic.com.
About Holt Integrated Circuits
Located in Mission Viejo, CA, Holt Integrated Circuits is a major supplier of ICs for avionics and military data bus and display applications. The company’s products are specified by more than 400 manufacturers worldwide and are employed in flight control, navigation, engine management, communications, safety equipment, and in-flight entertainment systems.
Holt’s range of ICs supporting the ARINC 429 standard is the widest in the industry, and its display drivers offer high-voltage operation as well as innovative design features to enhance ease of use and testability. Holt’s transceivers for MIL-STD-1553 applications are recognized as the industry’s smallest and have the lowest power consumption. In addition, Holt also offers MIL-STD-1553 protocol ICs, Manchester encoder/decoders and interface transformers. Select products are available to DSCC SMD specifications. Holt also offers product compliant to the European Union "RoHS Directive 002/95/EC".
Holt Integrated Circuits is ISO 9001:2008 registered and is a STACK certified supplier.