The HI-84220 is a sixteen channel discrete-to-digital interface device. The device has eight channels designed to sense 28 V / Open signals and eight channels that sense Open / Ground signals. Data is multiplexed from each bank of sensors to an eight bit digital databus. All sense inputs are internally lightning protected to RTCA/DO160G, Section 22 Level 3 Pin Injection Test Waveform Set A (3 & 4), Set B (3 & 5A) and Set Z (3 & 5B) without using external components. The device outputs are CMOS / TTL compatible and may be disabled (tri-state) using the /CE and /OE pins.

The HI-84220 is offered in a small footprint 32-pin Plastic Quad Flat Package (PQFP).

Features

• Eight independent 28V/Open sensing channels
• Eight independent Open/Ground sensing channels 
• Sense inputs internally lightning protected to RTCA/DO160G, Section 22 Level 3 Pin Injection Test Waveform Set A (3 & 4), Set B (3 & 5A) and Set Z (3 & 5B) without using external components
• 5.0V single supply operation
• Low-power CMOS technology
• CMOS/TTL compatible outputs with tri-state capability
• Industrial & extended temperature ranges available

Applications

• Avionics discrete input sensing