TIMING DIAGRAMS

INTERNAL LIGHTNING PROTECTION (-10 Only)

The HI-8444-10, HI-8445-10 and HI-8488-10 are similar to the

“non -10” configurations with the exception that an external

15 Kohm resistor must be added in series with each ARINC input

in order to properly detect the ARINC 429 specified input

thresholds. This option is especially useful in applications where

external lightning protection circuitry is required.

The HI-8444-10, HI-8445-10 and HI-8448-10 will meet the

requirements of DO-160G, Level 3, waveforms 3, 4, 5A and 5B

with the 15 Kohm series resistors in place.

Please refer to the Holt AN-300 Application Note for additional

information and recommendations on lightening protection of Holt

Line Drivers and Receivers.

HI-8444, HI-8445, HI-8448

1.5V

1.5V

IN A

IN B

OUT A

OUT B

1.5V

1.5V

TEST A

/

TEST B

OUT A

/

OUT B

ARINC 429 Receiver Timing

Test Mode Timing

HOLT INTEGRATED CIRCUITS

5