GENERAL DESCRIPTION
The HI-8429 is an 8-channel discrete-to-digital sensor fabricated with Silicon-on-Insulator (SOI) technology designed to interface with a Serial Peripheral Interface (SPI).
Each input is individually configurable as either GND/Open or Supply/Open (28V/Open). Discrete input thresholds are programmable in the range of 2V to 12V. An SPI bus is used to configure the sensors and to read sensor data .
The part operates from a 3.3V ( 5%) digital supply and 12V to 15V analog supply.
​​​​​​​
FEATURES
• Robust CMOS Silicon-on-Insulator (SOI) technology
• Eight discrete inputs, individually configurable as
   GND/Open or Supply/Open
• Interrupt generated on any change of sensor state
• SPI programmable sensor thresholds
• Sensor data read through SPI bus
• Airbus ABD0100H specification compliant
• MIL-STD-704 compliant
• Sense inputs lightning protected to RTCA/DO1060G,
   Section 22 Level 3
• 10MHz Serial Peripheral Interface (SPI) allows 
   daisy-chaining of parts for efficient board routing
• Withstands inadvertent application of 115V AC/400Hz
   power to Sense inputs.
• Internal Self-Test mode checks analog comparators

APPLICATION
• Avionics Discrete to Digital Sensing