The DO-254 ARINC 429 Transceiver/Receiver Core, created and designed by Logicircuit, Inc., consists of a separate transceiver (transmitter) and receiver IP core implementing a point to multipoint communication channel bus. The ARINC 429 Transceiver/Receiver Core DO254 Certifiable Data Package is made up of the artifacts produced by applying the DO-254 lifecycle to the core and an encrypted version of the source code. It consists of a separate transceiver (transmitter) and receiver IP core implementing a point to multipoint communication channel bus. Many commercial aircraft use the ARINC 429 standard developed in 1977 for safety-critical applications. ARINC 429 utilizes a unidirectional bus with a single transmitter and up to twenty receivers.