The HI-84231 is an eight channel discrete-to-digital interface device with inputs configured to sense Open / Ground discrete signals. 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-84231 is offered in a small footprint 20-pin plastic TSSOP package. 

Features

• 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