National Hybrid introduces MIL-STD-1553 interface combining transceiver and transformer
Posted by John Keller
RONKONKOMA, N.Y., 14 Dec. 2009. National Hybrid Inc. in Ronkonkoma, N.Y., and Pulse Engineering in San Diego are introducing the Bus+ (pronounced Bus Plus) MIL-STD-1553 data bus that combines a transceiver and transformer into one package.
Designed for avionics and defense applications, the Bus+ is for space-constrained, mission-critical environments like aircraft and unmanned vehicles.
By combining National Hybrid's proprietary transceiver ASIC and Pulse's 1553-45 or 1553-71 dual ratio transformer into one board product, the Bus+ transceiver has a dynamic offset range of -250 millivolts to +250 millivolts as well as a maximum output noise of 10 millivolts and a minimum output impedance of 3,000 Ohms.
The Bus+ operates with a +5 VDD or +3.3 VDD power supply, +/-5 percent. With a 5-volt power supply, the Bus+ dissipates as much as 0.184 Watts of power and 35 milliamps of current in standby (no transmission) and less than 1.0 Watt with one channel transmitting at 100 percent duty cycle.
The peak pulse current for 5-volt operation is 650 milliamps and 900 milliamps for +3.3-volt operation. The receiver differential input voltage is 15 VPP for the +5 volt version and 12 VPP with a +3.3-volt power supply.
The device measures 0.4 by 0.4 by 0.185 inches, and operates in temperatures from -40 to 85 degrees Celsius, or a military operating temperature range from -55 to 125 C. For more information contact National Hybrid online at www.nationalhybrid.com
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