World’s First Galvanically Isolated ARINC 429 Line Driver

Thursday, September 2, 2021

Mission Viejo, CA (September 2, 2021) – Holt Integrated Circuits today expanded its line of galvanically isolated avionics products with the introduction of a new ARINC 429 line driver, HI-8598. The HI-8598 is the world’s first galvanically isolated ARINC 429 line driver and compliments the existing line receiver, HI-8460.

The HI-8598 is compatible with 3.3V logic and uses a patented capacitive isolation and power regulation to provide 800V galvanic isolation between the analog line driver and the logic interface, ensuring isolation between the ARINC 429 data bus and sensitive digital circuitry. This device is intended for use in safety critical systems, where it is essential to completely isolate any faults on the bus from mission critical electronics, making the HI-8598 a good choice for systems that will ultimately require FAA or EASA DO-254 DAL A certification. 

“The HI-8598 exceeds industry standards for galvanic isolation and is ideal for systems that require fault tolerance between the ARINC 429 bus and mission critical electronics,” said George Noh, Director of Sales and Marketing at Holt. “This part is the latest addition to a line of galvanically isolated avionics products, which include ARINC 429 line receivers and a quad discrete-to-digital sensor.” 

The HI-8598 converts logic signals to ARINC 429 levels (such as when using an FPGA or Holt’s HI-3220, HI-35933 or HI-35860 ARINC 429 protocol ICs) and also provides 37.5 Ohm or 5 Ohm resistors in series with each ARINC output to allow the use of external resistors for lightning protection. It is available in Industrial -40oC to +85oC, or Extended, -55oC to +125oC temperature ranges with optional burn-in in a compact 18-pin SOIC-WB package. Samples are available upon request.

To request information on Holt’s ARINC 429, MIL-STD-1553 and other products, readers should contact Holt at (949) 859-8800, by e-mail at, or visit the Holt Web site at



About Holt Integrated Circuits

Located in Mission Viejo, CA, Holt Integrated Circuits is a major supplier of ICs for avionics and military aircraft 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 MIL-STD-1553 transceivers are recognized as the industry’s smallest, having the lowest power consumption. In addition, Holt MIL-STD-1553 integrated terminals offer the most compact, cost effective solution available, integrating protocol, transceiver and transformers in a single 15x15mm package. Other data bus products include ARINC 717, CAN (ARINC 825), Ethernet, RS-485/422, discrete-to-digital and analog switches. Select products are available to DSCC SMD specifications. Holt also offers product compliant to the European Union "RoHS Directive /95/EC". 

Holt Integrated Circuits is AS9100D:2016 and ISO 9001:2015 registered.



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