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August 2006
HI-8570, HI-8571
+/- 5V Supply, ARINC 429 LINE DRIVER
DESCRIPTION
The HI-8570 and HI-8571 are CMOS integrated circuits designed to directly drive the ARINC 429 bus in an 8-pin package. 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.
A logic input is provided to control the slope of the differential output signal. Timing is set by an on-chip resistor and capacitor and tested to be within ARINC requirements.
The HI-8570 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 external resistance may be added for lightning protection circuits.