HI-8686

HI-8685, HI-8686 February 2001 ARINC INTERFACE DEVICE ARINC 429 & 561 Serial Data to 16-Bit Parallel Data PIN CONFIGURATIONS (Top View) DATARDY D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 GND 1 2 3 4 5 6 7 8 9 10 11 12 13 14 28 27 26 25 24 Vcc GAPCLK TESTA TESTB RESET RINB (-10) RINA (-10) ERROR PARITY ENB READ D0 D1 D2 D3 DESCRIPTION The HI-8685 and HI-8686 are system components for interfacing incoming ARINC 429 signals to 16-bit parallel data using proven +5V analog/digital CMOS technology. Both products incorporate the digital logic and analog line receiver circuitry in a single device. The receivers on the HI-8685 and the HI-8686 connect directly to the ARINC 429 Bus and translate the incoming signals to normal CMOS levels. Internal comparator levels are set just below the standard 6.5 volt minimum data threshold and just above the standard 2.5 volt maximum null threshold. The -10 version of the HI-8685 allows the incorporation of an external 10KΩ resistance in series with each ARINC input for lightning protection without affecting ARINC level detection. Both products offer high speed 16-bit parallel bus interface, a 32-bit buffer, and error detection for word length and parity. A reset pin is also provided for power-on initialization. HI-8685PSI 23 HI-8685PST 22 & 21 HI-8685PSI-10 HI-8685PST-10 20 19 18 17 16 15 FEATURES ! Automatic conversion of serial ARINC 429, 575 & 561 data to 16-bit parallel data HI-8685 28-Pin Plastic SOIC - WB Package ! High speed parallel 1...