Discrete-to-Digital from Holt Inc

Discrete-to-Digital from Holt Inc

Avionics Data Bus – Discrete-to-Digital

Holt’s range of discrete-to-digital components, available from APC Hi-Rel, provide a robust solution for sensing open / ground and 28V / open discrete signals. These devices are typically used in simple sensing applications such as detecting open hatches or doors.

Datasheets and product information are available below.

For more information on specifying the right product for your application and requirements contact our technical sales team on 0330 124 4540 or email hi-rel@apcplc.com

DeviceDevice TypeDescriptionReleasedClick to View Datasheet
Device:HI-8429 Device Type:8-channel Open/Ground or 28V/Open Description:Octal discrete sensing device with individually configurable channels and SPI interface. Built-in lightning protection (DO-160G, Level 3). Includes sensor output interrupt pin and optional debounce... Released:2014 Click to View Datasheet:HI-8429 Rev. D - updated 6/7/2017
Device:HI-8435 Device Type:32-channel Open/Ground or 28V/Open Description:Lightning protected 32-channel discrete sensing device with SPI interface. Released:2013Click to View Datasheet:HI-8435 Rev. J - updated 2/22/2018
Device:HI-8436 Device Type:Low threshold 32-channel Open/Ground or 28V/Open Description:Low Threshold lightning protected 32-channel discrete sensing device with SPI interface. Released:2013 Click to View Datasheet:HI-8436 Rev. E - updated 2/22/2018
Device:HI-8437 Device Type:Low threshold 32-channel sensor Description:Low Threshold, lightning protected, 32-channel high impedance discrete sensing device with SPI interface. Released:2013 Click to View Datasheet:HI-8437 Rev. B - updated 2/22/2018
Device:HI-8428Device Type:8-channel Open/Ground or 28V/Open Description:Octal discrete sensing device with individually configurable channels and SPI interface. Built-in lightning protection (DO-160G, Level 3). Drop-in replacement for DEI1282. Released:2014 Click to View Datasheet:HI-8428 Rev. B - updated 6/7/2017
Device:HI-8428-RDevice Type:8-channel Open/Ground or 28V/Open Description:Octal discrete sensing device with individually configurable channels and SPI interface. Drop-in replacement for DEI1284. Released:2014 Click to View Datasheet:HI-8428-R Rev. A - updated 10/16/2015
Device:HI-8470 Device Type:16-channel Open/Ground or 28V/Open sensor inputs with ARINC 429 Transmitter Description:ARINC 429 Line Driver with Built-In Lightning Protection (DO-160G, Level 3) and 16-Channel Discrete-to-Digital sensor inputs. Released:2013 Click to View Datasheet:HI-8470 Rev. D - updated 2/22/2018
Device:HI-8425 HI-8426 Device Type:Octal Open/Ground or 28V/Open Description:Lightning protected octal discrete sensing device with quad low-side drivers. Released:2012 Click to View Datasheet:HI-8425 Rev. H - updated 2/22/2018
Device:HI-8430 HI-8431 Device Type:Octal Open/Ground or 28V/Open Description:Lightning protected octal discrete sensing device with quad high-side drivers. Released:2012 Click to View Datasheet:HI-8430 Rev. G - updated 2/22/2018
Device:HI-8420 Device Type:Open/Ground 6 channels Description:Discrete input sensing device with tri-state outputs. Released:2001 Click to View Datasheet:HI-8420 Rev. F - updated 12/13/2013
Device:HI-8421 Device Type:28V/Open 6 Channels Description:Discrete input sensing device with tri-state outputs. Released:2001 Click to View Datasheet:HI-8421 Rev. G - updated 12/13/2013
Device:HI-8422 Device Type:Open/Ground 8 Channels and 28V/Open 8 Channels Description:Discrete input sensing device with tri-state outputs. Released:2001Click to View Datasheet:HI-8422 Rev. H - updated 9/10/2014
Device:HI-8423 Device Type:Open/Ground 8 Channels Description:Discrete input sensing device with tri-state outputs. Released:2001 Click to View Datasheet:HI-8420 Rev. F - updated 12/13/2013
Device:HI-8424 Device Type:28V/Open 8 Channels Description:Discrete input sensing device with tri-state outputs. Released:2001Click to View Datasheet:HI-8421 Rev. G - updated 12/13/2013

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