Close 

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

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.

Related stories

ARINC 429 avionics databus line driver that meets DO-160G Level 3 pin injection waveforms introduced by Holt

Single-chip 3.3-volt IC for ARINC 717 flight data recorder avionics databus introduced by Holt

ARINC 825 compliant CAN transceiver for avionics applications introduced by Holt Integrated Circuits.


To access this Article, go to:
http://www.militaryaerospace.com/content/mae/en/articles/2012/12/MAE-Holt-IC.html