Editor's Note

Holt Integrated Circuits

By Jonathan Ray | August 1, 2010
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Avionics Data Bus IC Solutions

Holt Integrated Circuits has provided single-chip IC data bus solutions to the avionics industry for more than 15 years, supplying more than 400 manufacturers worldwide in a wide variety of applications such as flight control, navigation, engine management, communications, safety equipment and in-flight information systems.

Holt’s ARINC 429 portfolio is the widest in the industry, providing a large selection of protocol ICs, line drivers, line receivers and fully integrated solutions. Holt’s ARINC 429 ICs are found in almost every commercial aircraft flying today and are also deployed in numerous military helicopter programs such as the Blackhawk and Apache.

Holt also offers a range of components for MIL-STD-1553 applications, including protocol ICs, transceivers and transformers. Holt’s MIL-STD-1553 products are found on programs such as the F-16, Bradley Fighting Vehicle, JDAM and Airbus A350 XWB. Paul Shears, BAE Systems Senior Software Engineer, was quoted as saying “Having worked with the device [HI-6121], I am extremely impressed with both its performance and design."

In addition to ARINC 429 and MIL-STD-1553, Holt has also recently released a CAN (ARINC 825 compliant) protocol IC, which integrates the analog transceiver on the same chip.

All of Holt’s products are available in industrial -40C to +85C or extended -55C to +125C temperature ranges, with optional burn-in available on many products in the extended temperature range.

ARINC 429 Components

Holt Integrated Circuits is the leading supplier of ARINC 429 integrated circuit components worldwide. The line driver and line receiver, HI-8592 and HI-8591, respectively, connect directly to the ARINC 429 bus and perfectly complement existing FPGA or discrete protocol solutions. The HI-8448 is the world’s smallest Octal line receiver and the HI-8592 line driver is the first to operate solely from a single +5V supply.

Many customers opt for Holt’s fully integrated ARINC 429 solutions, which integrate the digital ARINC 429 protocol on the same chip as the analog line driver/line receiver functions. This provides an extremely robust, reliable and compact all-in-one solution. The HI-3585 includes one receive channel with built-in analog line receiver, one transmit channel with built-in line driver, 256 programmable label filters and 32-word receive and transmit FIFOs.

The HI-3585 communicates with an external microprocessor via a compact 4-pin SPI host interface. Products with a 16-bit parallel host interface are also available. Many of Holt’s ARINC 429 products provide the capability to use external resistors to allow highly robust lightning protection schemes.

MIL-STD-1553 Components

Holt supplies protocol ICs, transceivers and transformers for MIL-STD-1553 applications. All protocol ICs integrate dual transceivers on the same chip.

The HI-6120/21 operates in RT mode and provides a comprehensive host interface and feature set, including SPI or 16-bit parallel interface, 64 kByte RAM, auto-initialization, four selectable data buffer modes, internal illegalization table, time tag counter and interrupt log buffer. This functionality is available in a very compact 9mm x 9mm QFN package or PQFP. The HI-6110 message processor provides a fully integrated MIL-STD-1553 solution and can operate in BC/MT/RT modes, offering a reliable and compact solution. The HI-1573 transceiver is a dual channel device which operates from a 3.3V supply. The HI-1573 has the lowest power dissipation and smallest footprint in the industry at 7x7x1 mm in a QFN package.

Holt also offers the smallest footprint isolation and coupling transformer solution at 0.4x0.4x0.185-inch. PM-DB2798S is a dual ratio device to allow selection of either transformer-coupled or direct-coupled turns ratio from the secondary winding.

Quality Certifications and Customer Service

Since its inception, Holt Integrated Circuits has prided itself on superior quality and customer satisfaction and holds gold supplier ratings for quality and on-time delivery from many customers, including the Lockheed Martin STAR Supplier award.

Holt’s single-chip solutions avoid the long lead times incurred in competitor multi-chip module solutions, maintaining stock on most products. With all its testing and screening done on-site, the final product is delivered directly from Holt’s door to the customer.

Holt also holds numerous quality certifications, namely ISO 9001:2008, PURE and STACK, with select products available to DSCC SMD specifications.

Holt Integrated Circuits

Phone 949-859-8800 or

Visit www.holtic.com

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