HI-3593PQT

The HI-3593 from Holt Integrated Circuits is a CMOS integrated circuit for interfacing a Serial Peripheral Interface (SPI) enabled microcontroller to the ARINC 429 serial bus. The device provides two receivers, each with user-programmable label recognition for any combination of 256 possible labels, 32 x 32 Receive FIFO, 3 prioritylabel quick-access double-buffered registers and analog line receiver. The independent transmitter has a 32 x 32 Transmit FIFO and built-in line driver. The line driver operates from a single 3.3V supply and includes on-chip DC/DC converter to generate the bipolar ARINC 429 differential voltage levels needed to directly drive the ARINC 429 bus. The status of the transmit and receive FIFOs and priority-label buffers can be monitored using the programmable external interrupt pins, or by polling the HI-3593 Status Registers.