Discrete-to-Digital

Holt’s range of Discrete-to-Digital components provides 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.

DeviceDevice TypeDescriptionReleasedDatasheet
HI-8429 8-channel Open/Ground
or 28V/Open
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... 2014
HI-8435 32-channel Open/Ground
or 28V/Open
Lightning protected 32-channel discrete sensing device with SPI interface. 2013
HI-8436 Low threshold 32-channel Open/Ground
or 28V/Open
Low Threshold lightning protected 32-channel discrete sensing device with SPI interface. 2013
HI-8437 Low threshold 32-channel sensor Low Threshold, lightning protected, 32-channel high impedance discrete sensing device with SPI interface. 2013
HI-8428 8-channel Open/Ground
or 28V/Open
Octal discrete sensing device with individually configurable channels and SPI interface. Built-in lightning protection (DO-160G, Level 3). Drop-in replacement for DEI1282. 2014
HI-8428-R 8-channel Open/Ground
or 28V/Open
Octal discrete sensing device with individually configurable channels and SPI interface. Drop-in replacement for DEI1284. 2014
HI-8470 16-channel Open/Ground or 28V/Open sensor inputs with ARINC 429 Transmitter ARINC 429 Line Driver with Built-In Lightning Protection (DO-160G, Level 3) and 16-Channel Discrete-to-Digital sensor inputs. 2013
HI-8425
HI-8426
Octal Open/Ground
or 28V/Open
Lightning protected octal discrete sensing device with quad low-side drivers. 2012
HI-8430
HI-8431
Octal Open/Ground
or 28V/Open
Lightning protected octal discrete sensing device with quad high-side drivers. 2012
HI-8420 Open/Ground
6 channels
Discrete input sensing device with tri-state outputs. 2001
HI-8421 28V/Open
6 Channels
Discrete input sensing device with tri-state outputs. 2001
HI-8422 Open/Ground
8 Channels and 28V/Open
8 Channels
Discrete input sensing device with tri-state outputs. 2001
HI-8423 Open/Ground
8 Channels
Discrete input sensing device with tri-state outputs. 2001
HI-8424 28V/Open
8 Channels
Discrete input sensing device with tri-state outputs. 2001