HI-8502

July 2016 HI-8500 ARINC 429 Line Driver Family with Tri-State Option DESCRIPTION The HI-8500 family is a full-featured ARINC 429 Line Driver providing three choices of output resistance and a tri-state option, which allows the outputs to be put in a highimpedance state. Like Holt’s industry-standard HI-8585 and HI-8586 ARINC 429 line drivers, the HI-8500 includes digital slew-rate selection to support high-speed (100kb/s) and low-speed (12.5kb/s) data rates. The part is offered in a variety of small footprint packages including 5mm x 5mm 20-lead plastic QFN package and traditional 8-pin SOIC package. Ceramic DIPs are also available. Inputs are compatible with either 5V or 3.3V logic. Internal pull-up/down resistors are available on HI-8506 for each digital input. The resistors are brought out to pins, which may be externally grounded to hold the ARINC bus in the null-sate during system power-up, or connected to logic power to hold the outputs tri-state. This feature is of benefit w...