HI-8585

HI-8585, HI-8586 January 2001 ARINC 429 LINE DRIVER PIN CONFIGURATION SLP1.5 1 TX0IN 2 TX1IN 3 GND 4 DESCRIPTION The HI-8585 and HI-8586 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. The CMOS/TTL control inputs are translated to ARINC specified amplitudes using on board zeners. 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-8585 has 37.5 ohms in series with each line driver output. The HI-8586 provides the option to bypass most of the output resistance so that series protection circuits can add their resistances. The HI-8585 or the HI-8586 along with the HI-8588 line receiver offer the smallest options available to get on and off the ARINC bus. 8 V+ 7 TXBOUT 6 TXAOUT 5 V- SUPPLY VOLTAGES V+ = 12V to 15V V- = -12V to -15V FUNCTION TABLE TX1IN TX0IN 0 1 1 0 0 1 SLP1.5 X 0 1 0 1 X TXAOUT 0V -5V -5V 5V 5V 0V TXBOUT 0V 5V 5V -5V -5V 0V SLOPE N /A 10µs 1.5µs 10µs 1.5µs N /A 0 0 FEATURES ! ! ! ! ! ! ! ! Direct ARINC 429 line driver interface in a small package On-chip zener to set output levels On-chip line driver slope control and selection by logic input Low current 12 to 15 volt supplies CMOS / TTL logic pins Plastic and ceramic package options surface mount an...