New ARINC 429 Line Driver Family Featuring Tri-State while Powered On or Off

Wednesday, July 12, 2017

Mission Viejo, CA (July, 2017)Holt Integrated Circuits today announced a new family of ARINC 429 line drivers, HI-8500, which provide an option of tri-state high impedance outputs while the device is powered on or off. In addition, three choices of output resistance are available to enable connection of external components for enhanced lightning protection.


Like Holt’s industry-standard HI-8585 and HI-8586 ARINC 429 line drivers, the HI-8500 includes digital slew-rate selection to support high-speed (100kb/s) and low-speed (12.5kb/s) data rates. Inputs are compatible with either 5V or 3.3V logic. The HI-8507 additionally bonds out pull-up/down resistors connected to the TXIN and SLP pins, enabling these inputs to force the ARINC bus to a known state (Null or tri-state) during system power-up.  

Tri-state mode of operation is essential when connecting more than one line driver to a databus, typically used for redundancy or test purposes,” said Anthony Murray, Holt’s Director of Marketing Communications. “Operating in Hi-Z mode while powered down allows simultaneous connection of additional LRUs without disturbing the bus.” 

These devices are available in industrial (−40oC to +85oC) and extended (−55oC to +125oC) temperature ranges, with optional burn-in available for extended temperature range devices. Package options include an industry standard SOIC-8, ceramic DIP and a small footprint 5mm x 5mm 20-pin QFN. The HI-8500 family is pin compatible with Holt’s existing line drivers, such as HI-8585  and offers a pin-for-pin drop-in replacement for the DEI1070A-DEI1075A, DEI1170A and DEI1171A devices, with the added feature of a powered-off Hi-Z mode.

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, or visit the Holt website at




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 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 15 x 15mm package. Other data bus products include ARINC 717, CAN (ARINC 825), 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 002/95/EC".


Holt Integrated Circuits is AS9100C and ISO 9001:2008 registered and is a STACK certified supplier and latest recipient of the STACK International Gold Supplier Award.



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