HI-8570 / HI-8571

The HI-8570 and HI-8571 are CMOS integrated circuits designed to directly drive the ARINC 429 bus using only +5V and -5V supplies.

Two logic inputs control a differential voltage between the output pins producing a +10 volt One, a -10 volt Zero, and a 0 volt Null.

The CMOS/TTL control inputs are translated to ARINC specified amplitudes. A logic input is provided to control the slope of the differential output signal. Timing is set by on-chip resistor and capacitor and tested to be within ARINC requirements.

The HI-85870 has 37.5 ohms in series with each line driver output. The HI-8571 provides the option to bypass part of the output resistance so that series protection circuits can add their resistances.

The HI-8570 or the HI-8571 along with the HI-8588 or HI-8591 line receivers offer the smallest options available to get on and off the ARINC bus.



  • Direct ARINC 429 Line Driver Interface in a Small Package
  • On-chip Line Driver Slope Control and Selection by Logic Input
  • Low Current 5 Volt Supplies
  • CMOS / TTL Logic Pins
  • Plastic and Ceramic Package Options - Surface Mount and DIP
  • Thermally Enhanced SOIC Packages
  • Lead-free / RoHS Compliant options available
  • Industrial & Extended Temperature Ranges Available



  • Avionics Data Communication
  • CMOS/TTL to ARINC Level Conversion
  • CMOS/TTL to RZ & NRZ Level Conversion