HI-8591

HI-8591 August 2006 ARINC 429 LINE RECEIVER PIN CONFIGURATIONS VCC - 1 TESTA - 2 RINB - 3 RINA - 4 8 - TESTB 7 - ROUTB 6 - ROUTA 5 - GND DESCRIPTION The HI-8591 is an ARINC 429 bus interface receiver designed to operate from a single 3.3 V or 5 V supply. The part is designed with high-impedance inputs to minimize bus loading, and has an exceptional input common-mode performance in excess of +/- 30V, making it immune to ground offsets around the aircraft. The RINA and RINB inputs of the standard HI-8591 may be connected directly to the ARINC 429 bus. To enable external lightning protection circuitry to be added, the HI-8591-40 variant is available. The HI-8591-40 requires only the addition of external 40 KW, ¼ watt resistors in series with RINA and RINB to allow the part to meet the lightning protection requirements of DO-160D level 3. The typical 10 volt differential ARINC 429 signal is translated and input to a window comparator and latch. The comparator levels are set just below the standard 6.5 volt minimum ARINC data threshold and just above the standard 2.5 volt maximum ARINC null threshold. The TESTA and TESTB inputs bypass the analog inputs for testing purposes. Also if TESTA and TESTB are both taken high, the digital outputs are forced to zero. See Holt Application Note AN-300 for more information on lightning protection. HI-8591PSI, HI-8591PST & HI-8591PSM HI-8591PSI-40, HI-8591PST-40 & HI-8591PSM-40 8 - PIN PLASTIC NARROW BODY SOIC NC VCC TESTB NC TESTA RINB RINA...