Posted by John Keller

MISSION VIEJO, Calif., 13 Dec. 2011. Holt Integrated Circuits Inc. in Mission Viejo, Calif., is introducing three analog switch products for multiplexing the ARINC 429 commercial avionics databus in harsh environments such as avionics or industrial automation applications.

The devices have features for applications that requires the switch to be open circuit when power is off. Switch on-resistance (RON) is 28 ohms maximum and within 10 percent flat across a plus-or-minus 5-volt Common Range. These products operate from a 3.3- or 5-volt logic supply and an analog supply ranging from plus-or-minus 10 volts to plus-or-minus 15 volts.

The Holt HI-8195, HI-8196, and HI-8197 are quad single-pole/single-throw (SPST) switches that are open-circuit anytime all the supply pins are ground. The HI-8195 has four normally open (NO) switches, the HI-8196 has four normally closed (NC) switches, and the HI-8197 has two NO and two NC switches.

The devices are fabricated on silicon-on-insulator (SOI) technology for latch-up free operation and maximum isolation, with low off-state leakage, company officials say. Switching operation is break-before-make.

The devices are available in industrial temperature ranges of -40 to 85 degrees Celsius, as well as in the full-military temperature range of -55 to 125 C. The devices come in 16-pin SOIC and 5-by-5-millimeter 16-pin QFN packages.

For more information contact Hold Integrated Circuits online at www.holtic.com.