32-Channel Discrete-to-Digital Sensing IC with SPI Interface and Built-In Lightning Protection

Tuesday, February 05, 2013

Mission Viejo, CA (February 5, 2013) – Holt Integrated Circuits today announced the introduction of HI-8435, a new 3.3V, 32-channel, discrete-to-digital sensing IC with SPI interface and built-in lightning protection. The sense input thresholds and hysteresis are programmable via the 20MHz SPI bus and all 32 sense output states may be read with a single SPI command. The device is also fully compliant to Airbus ABD0100H. 

The 32 sensing channels are divided into 4 banks of 8 inputs, with each bank configurable over the SPI bus to detect either GND/Open or 28V/Open signals. Thresholds and hysteresis are programmable in 0.5V steps from 2V to 21V, with GND/Open and 28V/Open input banks independently configurable.

This type of device may be used in a multitude of aircraft sensing applications, such as “hatch open” and “wheels up” indicators. Customers may easily implement a 32-channel solution using a single device or increase the number of channels by controlling a number of devices on a single SPI bus using individual chip-selects. 

“This product expands Holt’s existing discrete-to-digital product family, giving our customers ultimate flexibility and cost savings in applications requiring a large number of sense channels,” said George Noh, Director of Sales and Marketing at Holt.

The device is available in industrial −40oC to +85oC and extended −55oC to +125oC temperature ranges and comes in multiple standard package options, including 44 pin PQFP and compact 7mm x 7mm 44-pin QFN.

To request information on Holt’s ARINC 429, CAN, 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 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, RS-485/422 and analog switches. Select products are available to DSCC SMD specifications. Holt also offers product compliant to the European Union "RoHS Directive 002/95/EC".




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