Mission Viejo, CA (August 15, 2018) – Holt Integrated Circuits today announced the release of a quad galvanically isolated discrete-to-digital sensor for avionics applications. The HI-8400 exceeds Airbus ABD0100 specification requirements by providing 800V galvanic isolation between individual sensors and the logic interface. Sensor input thresholds are compliant to Airbus ABD0100H and MIL-STD-704 specifications and sensor outputs may be read from a Serial Peripheral Interface (SPI) or parallel bus. A sensor output interrupt pin alerts the system to a change in sensor input, avoiding constant polling via SPI to check status.
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Each discrete input is configurable as a GND/Open or Supply/Open (28V/Open) sensor, making this device ideal for systems required to tolerate different grounds or excessive voltage transients. The HI-8400 is also suitable for relay switching detection, providing a 1mA wetting current to prevent dry contacts. In addition to galvanic isolation, 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) with respect to the sensor return ground without using external components.
“Galvanic isolation and integrated lightning protection are often requirements in avionics systems, and implementation sometimes requires a large number of individual discrete components”, said George Noh, Director of Sales and Marketing at Holt. “This product integrates both sensing and protection functions in a single device, providing our customers with a simple, cost effective and space saving solution.”
The device is available in industrial −40oC to +85oC and extended −55oC to +125oC temperature ranges with optional burn-in at the higher temperature, and comes in a compact 44 pin PQFP package. Samples and an evaluation board are available from Holt on request.
To request information on Holt’s ARINC 429, MIL-STD-1553 and other product lines, readers should contact Holt at (949) 859-8800, by e-mail at info@holtic.com, or visit the Holt website at www.holtic.com.
About Holt Integrated Circuits
Located in Mission Viejo, CA, Holt Integrated Circuits is a major supplier of ICs for avionics and military aircraft data bus and display applications. The company’s products are specified by more than 400 manufacturers worldwide and are employed in flight control, navigation, engine management, communications, safety equipment, and in-flight entertainment systems.
Holt’s range of ICs supporting the ARINC 429 standard is the widest in the industry, and its MIL-STD-1553 transceivers are recognized as the industry’s smallest, having the lowest power consumption. In addition, Holt MIL-STD-1553 integrated terminals offer the most compact, cost effective solution available, integrating protocol, transceiver and transformers in a single 15x15mm package. Other data bus products include ARINC 717, CAN (ARINC 825), Ethernet, RS-485/422, discrete-to-digital and analog switches.
Select products are available to DSCC SMD specifications. Holt also offers product compliant to the European Union "RoHS Directive /95/EC".
Holt Integrated Circuits is AS9100D:2016 and ISO 9001:2015 registered.