Holt’s HI-84440-R and HI-84450-R Quad ARINC 429 line receivers are designed as form-fit-function dropin replacements for Holt devices HI-8444-10 and HI-8445-10 respectively and require an external 10 kΩ – 15 kΩ resistor in series with the analog inputs. The devices include internal lightning protection circuitry, which ensures compliance with RTCA/DO-160G, Section 22 Level 3 Pin Injection Test Waveform Set A (3 & 4), Set B (3 & 5A) and Set Z (3 & 5B).

The devices are designed to operate from either a 5V or 3.3V power supply. Each receiver channel translates incoming ARINC 429 data bus signals to a pair of TTL / CMOS compatible output signals.

The TESTA and TESTB inputs bypass the analog inputs for testing purposes. They force the receiver outputs to the specified ZERO, ONE or NULL state. The ARINC inputs are ignored when the devices are in test mode.

The HI-84440-R device produces low outputs when the TESTA and TESTB inputs are held high. The HI-84450-R devices do not have TEST inputs and these pins may be considered no-connect (NC).

All parts are available in Industrial -40^oC to +85^oC, or Extended, -55^oC to +125^oC temperature ranges. Optional burn-in is available on the extended temperature range. 

Features

• Lightning protection circuitry ensures compliance with RTCA/DO-160G, Section 22 Level 3 Pin Injection Test Waveform Set A (3 & 4), Set B (3 & 5A) and Set Z (3 & 5B)
• 3.3V or 5.0V single supply operation 
• Test inputs bypass analog inputs and force digital outputs to a one, zero, or null state (not available on HI-84450-R)
• Drop-in replacements for Holt’s HI-8444-10 and HI-8445-10
• Industrial and Extended temperature ranges
• Burn-in available

Applications

• Avionics Data Communications
• ARINC 429 to CMOS/TTL Level Conversion