The HI-8448 is an octal ARINC 429 Line receiver IC available in a 44-pin plastic Quad Flat Package (PQFP). Each independent receiver channel translates incoming ARINC 429 data bus signals to an associated pair of CMOS/TTL outputs. Using low-power analog/digital CMOS technology, the line receivers will operate from either a 3.3V or 5V supply. Each ARINC input is internally protected to meet the lightning protection requirements of DO-160C/D Level 3, waveforms 3, 4 & 5A. The HI-8448 has inputs (TESTA & TESTB) that bypass the analog circuitry for testing purposes. They force the receiver outputs to the specified ZERO, ONE or NULL state. The ARINC inputs are ignored when the device is in the test mode.



  • Four ARINC 429 line receivers
  • 3.3V or 5.0V single supply operation
  • Test inputs bypass analog inputs and force digital outputs to ZERO, ONE or NULL states
  • Low-power CMOS technology
  • CMOS/TTL compatible outputs
  • ARINC inputs internally lightning protected per DO-160D level 3
  • 44-pin plastic PQFP package
  • Industrial & extended temperature ranges available



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