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Summary of Contents for HOLT HI-8470
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Page 1: Evaluation Board
23351 Madero, Mission Viejo, CA 92691. USA. Tel: + 1 949 859 8800 Fax: + 1 949 859 9643 Email: sales@holtic.com Web: www.holtic.com HI-8470/HI-8476 ARINC 429 Repeater Evaluation Board Quick Start Guide Oct 25, 2018 QSG-8476-Repeater_A HOLT INTEGRATED CIRCUITS 10/25/18... - Page 2 INTRODUCTION The Holt ARINC Repeater Board contains the Holt HI-8470 and HI-8476 devices, these are ARINC 429 receiver and transmitter devices respectively. In this project they are combined together to produce an ARINC 429 repeater or regenerator. The board runs from a single 3.3V ± 5% supply voltage. The Repeater Evaluation Module requires no software for control;...
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Page 3: Kit Contents
28VDC instead of a 3.3VDC supply. More details about the design of the repeater are available in the Holt ARINC repeater white paper. This guide summarizes how to get set up and running quickly. -
Page 4: Connector Functions
Transmit ARINC 429 speed ON = High, OFF = Low PARITY HI-8476 Parity Checking ON = Enable, OFF = Disable BIT32N Use HI-8476 Parity bit to disable HI-8470 transmission SD bit filtering enable ON = Enabled SD9 filtering enable ON = Enabled SD10... - Page 5 ARINC 429 outputs, TXA and TXB for best results; use the scope in differential mode. Observe the ARINC 429 output waveform, it should be the test pattern, all 1’s and should look similar to the waveform shown below: QSG-8476-Repeater_A HOLT INTEGRATED CIRCUITS 10/25/18...
- Page 6 5. With the SW1 PARITY switch in default mode, the repeater will re-transmit all valid ARINC words whether the parity is odd or even. When set to ON, parity checking is enabled, so only odd parity words are retransmitted. QSG-8476-Repeater_A HOLT INTEGRATED CIRCUITS 10/25/18...
- Page 7 OSC, 4 PIN, 1MHz 3.3V .1uF, 50V 4 5 6 ON (CLOSED) ON (CLOSED) VLOGIC Title 74HC74 74HC74 ARINC 429 REPEATER using HI-8476 AND HI-8470 4 5 6 4 5 6 Size Document Number ON FOR PARITY CHECKING VLOGIC <Doc> <Rev Code>...
- Page 8 11-Dec-13 HI-8470 & 76 Arinc Repeater Board Description Mfr P/N Reference DigiKey Capacitor, Ceramic 100nF 10% 50V X7R 0603 Kemet C0603C104K5RACTU C4,C7,C8,C14 399-5089-1-ND Capacitor, Ceramic 10nF 10% 50V X7R 0603 Kemet C0603C103K5RACTU 399-1091-1-ND Capacitor Ceramic 4.7uF 10V 10% X5R 0603...
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Page 9: Revision History
QSG-8476, Rev. New 12/11/13 Initial Release QSG-8476-Repeater, Change document name from QSG-8476_New to 01/20/14 Rev. New QSG-8476-Repeater_New QSG-8476-Repeater, Correct typo in Connector Functions table on p. 4. J2, 10/25/18 Rev. New RXA and RXB pins reversed. QSG-8476-Repeater_A HOLT INTEGRATED CIRCUITS 10/25/18...