HI-8586 Datasheet | Holt Integrated Circuits

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 and DIP Themally enhanced SOIC packages Mil processing available 0 1 1 1 PIN DESCRIPTION TABLE P IN 1 2 3 4 5 6 7 8 SYM B O L SLP1.5 TX0IN TX1IN GND VTXAOUT TXBOUT V+ FUNCTION LOGIC INPUT LOGIC INPUT LOGIC INPUT POWER POWER LOGIC OUTPUT LOGIC OUTPUT POWER DESCRIP T ION CMOS OR TTL, V+ IS OK CMOS OR TTL CMOS OR TTL GROUND -12 TO -15 VOLTS LINE DRIVER TERMINAL A LINE DRIVER TERMINAL B +12 TO +15 VOLTS (DS8585 Rev. D) HOLT INTEGRATED CIRCUITS 1 01/01 HI-8585, HI-8586 FUNCTIONAL DESCRIPTION Figure 1 is a block diagram of the line driver. The +5V and -5V levels are generated internally using...