ARINC 429 Transmitter with Line Driver and Dual Receivers GENERAL DESCRIPTION The HI-8581 and HI-8589 from Holt Integrated Circuits are silicon gate CMOS devices for interfacing a 16-bit parallel data bus directly to the ARINC 429 serial bus. Both devices provide two receivers, an independent transmitter and line driver capability in a single package. The receiver input circuitry and logic are designed to meet the ARINC 429 specifications for loading, level detection, timing, and protocol. The transmitter section provides the ARINC 429 communication protocol and the line driver circuits provide the ARINC 429 output levels. The 16-bit parallel data bus exchanges the 32-bit ARINC data word in two steps when either loading the transmitter or interrogating the receivers. The data bus interfaces with CMOS and TTL. The HI-8581 has 37.5 ohms in series with each line driver output. The HI-8589 provides the option to bypass most of the internal output resistance so that external series resistance may be added for lighting protection and still match the 75 ohm characteristic impedance of the ARINC bus. FEATURES • ARINC specification 429 compliant • Direct receiver and transmitter interface to ARINC bus in a single device • 16-Bit parallel data bus • Timing control 10 times the data rate • Selectable data clocks • Receiver error rejection per ARINC 429 standard • Automatic transmitter data timing • Parity functions • Low power • Self test mode • Industrial & extended temperature ranges

帶線路驅動器和雙接收器的ARINC 429發射器概述霍爾特集成電路公司的HI-8581和HI-8589是硅柵極CMOS器件，用于將16位并行數據總線直接連接到ARINC 429串行總線。兩款器件均在單個封裝中提供兩個接收器、一個獨立的發射器和線路驅動器功能。接收器輸入電路和邏輯設計符合ARINC 429關于負載、電平檢測、時序和協議的規范。發送器部分提供ARINC 429通信協議，線路驅動器電路提供ARINC 429輸出電平。加載發送器或詢問接收器時，16位并行數據總線分兩步交換32位ARINC數據字。數據總線與CMOS和TTL接口。HI-8581與每個線路驅動器輸出串聯37.5歐姆。HI-8589提供了旁路大部分內部輸出電阻的選項，因此可以添加外部串聯電阻來進行防雷保護，并且仍然與ARINC總線的75歐姆特性阻抗相匹配。特性符合ARINC規范429在單個器件中直接將接收器和發送器接口連接到ARINC總線16位并行數據總線時序控制10倍于數據速率可選數據時鐘接收器誤差抑制符合ARINC 429標準自動發送器數據時序奇偶校驗功能低功耗自測模式工業和擴展溫度范圍