Octal discrete-to-digital sensing IC with lightning protection introduced by Holt

Dec. 9, 2012
MISSION VIEJO, Calif., 9 Dec. 2012. Holt Integrated Circuits in Mission Viejo, Calif., is introducing the HI-8425 3.3-volt octal discrete-to-digital sensing integrated circuit (IC) with quad low-side drivers and built-in lightning protection for commercial avionics and military avionics applications.

MISSION VIEJO, Calif., 9 Dec. 2012. Holt Integrated Circuits in Mission Viejo, Calif., is introducing the HI-8425 3.3-volt octal discrete-to-digital sensing integrated circuit (IC) with quad low-side drivers and built-in lightning protection for commercial avionics and military avionics applications.

The device complies to Airbus ABD0100H, and is for aircraft sensing applications such as hatch-open and wheels-up indicators. The built-in driver outputs are for driving relays or display panel warning lights.

Eight sensing channels may be configured to detect either GND/Open or 28-volt/Open, with programmable thresholds and hysteresis. The device operates from a 3-to-5.5-volt power supply with sense detection levels from 2 volts to 21 volts.

In addition, four low-side output drivers can drive 200-milliamp loads. Each individual driver has over-current shutdown protection, with fault detection signaled on external pins.

The HI-8426 is a more compact version of the HI-8425, with the same functionality minus individual fault detection pins. Fault detection is still functionally realized in the HI-8426 using a single-pin combined ORed output.

The devices are available in industrial versions that operate in temperatures from -40 to 85 degrees Celsius, or in extended-temperature versions that operate in -55 to 125 C.

Standard package options include 44-pin PQFQ and compact 40-pin or 32-pin QFNs. For more information contact Holt online at www.holtic.com.

About the Author

John Keller | Editor

John Keller is editor-in-chief of Military & Aerospace Electronics magazine, which provides extensive coverage and analysis of enabling electronic and optoelectronic technologies in military, space, and commercial aviation applications. A member of the Military & Aerospace Electronics staff since the magazine's founding in 1989, Mr. Keller took over as chief editor in 1995.

Voice your opinion!

To join the conversation, and become an exclusive member of Military Aerospace, create an account today!