The HI-8477 / HI-8478 are ARINC 429 Receivers designed specifically for use without a microprocessor. All configuration and control is programmed via logic level input pins, eliminating the need for a microprocessor or software interface and greatly reducing or eliminating the cost associated with software certification.
The HI-8477 receives ARINC 429 data directly from the bus and makes the data available at 32 digital output pins. The HI-8478 option provides the compliment of HI-8477 digital outputs from the 32-bit ARINC 429 word. ARINC 429 label filtering is defined by 16 digital input pins, defining a maskable label match to enable reception of a single label or group of labels.
A PARITY check pin provides the user the option of checking for correct odd parity on incoming ARINC 429 words (PARITY = logic "1"). Incorrect parity words are ignored. If this is undesirable in the application, and the user wishes to keep words with parity error, the HI-8475/76
, which store words with parity error when parity checking is enabled, should be selected. If parity checking is turned off (PARITY = logic "0"), all 32 bits of the received ARINC word are stored without parity check.
The receiver inputs are lightning protected to RTCA/DO-160G, Section 22 Level 3 Pin Injection Test Waveform Set A (3 & 4), Set B (3 & 5A) and Set Z (3 & 5B) with the use of only two external resistors. The devices support both high-speed and low-speed ARINC 429 data rates, operating from a 1MHz clock source and a single 3.3V or 5.0V power supply.
The devices are available in a 64-pin PQFP package in industrial (−40oC to +85oC) and extended (−55oC to +125oC) temperature ranges.
Features
- Pin programmable - requires no MCU or software control
- No need for certification to RTCA DO-178B, “Software Considerations in Airborne Systems and Equipment”
- Robust CMOS Silicon-on-Insulator (SOI) technology
- On-chip ARINC 429 Line Receiver
- 3.3 V or 5.0V single supply operation
- Maskable Label Filtering for single label or groups of labels
- Internal lightning protection circuitry for receiver inputs allows compliance with RTCA/DO-160G, Section 22 Level 3 Pin Injection Tests using only two external resistors
- HI-8478 option provides the compliment of HI-8477 digital outputs from the 32-bit ARINC 429 word.
- Certifiable to RTCA DO-254, “Design Assurance for Airborne Electronic Hardware”
Applications
- ARINC 429 data reception
- ARINC 429 applications requiring no MCU or software
