Holt Integrated Circuits Expands RS-485/422 Transceiver Family with 20MBit/sec Capability

Monday, April 02, 2012

Mission Viejo, CA (April 2, 2012) – Holt Integrated Circuits, a world leader in data bus IC’s for commercial and military avionics, expanded its RS-485/422 transceiver family to include devices optimized for higher bit rates. The ­HI-4853/54/55 family broadens the existing portfolio by offering devices optimized for data rates up to 20Mbps (100 ft. CAT-5 UTP).

All devices in the family offer extended power supply range (3.0V to 5.5V), controlled slew rate and a wide common mode voltage range (−16V to +20V for half-duplex, ± 24V for full-duplex). Driver slew rate control and pre-emphasis ensure optimum performance in environments having strict EMI/EMC requirements, such as avionics flight controls and industrial automation. Each device delivers at least ± 1.50V and ± 2.45V output drive at worst-case supply voltages of 3.0V and 4.5V respectively, over an extended temperature range of −55°C to +125°C into a differential load of 54Ω and 50pF.

The receiver offers true Fail-Safe operation, providing a guaranteed logic high output when the bus is open-circuit, short-circuit or idle (terminated but not driven). The receiver minimum input resistance is 90 kΩ, supporting up to 224 nodes per bus.

“Holt’s RS-485/422 transceivers provide competitive solutions for demanding applications,” said Anthony Murray, Director of Business Development at Holt. “These new devices are ideal for high speed avionics or industrial control applications such as MMSI (EBR-1553) or Profibus”.

The HI-4853 operates half duplex whereas the HI‑4854 and HI-4855 provide full duplex operation. Multiple package options are offered, including industry standard SO-8 pinouts. The HI-4852 and HI-4855 are available in compact 4mm x 4mm QFN-16 packages.

Devices are priced from $2.96 in 1K quantities and are available immediately.

To request information on Holt’s ARINC 429, MIL-STD-1553, ARINC 825 (CAN) and other aerospace products, readers should contact Holt at (949) 859-8800, by e-mail at info@holtic.com, or visit the Holt Web site 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 display drivers offer high-voltage operation as well as innovative design features to enhance ease of use and testability.  Holt’s transceivers for MIL-STD-1553 applications are recognized as the industry’s smallest and have the lowest power consumption.  In addition, Holt also offers MIL-STD-1553 protocol ICs, Manchester encoder/decoders and interface transformers, as well as other data bus products such as ARINC 717, CAN and RS-485.  Select products are available to DSCC SMD specifications.  Holt also offers product compliant to the European Union "RoHS Directive 002/95/EC".

Holt Integrated Circuits is ISO 9001:2008 registered and is a STACK certified supplier.


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