Aircraft Internal Time Division Command/Response Multiplex Data Bus
Data bus MIL-STD-1553 couplers provide transformer coupling between data bus and single or multiple remote terminals. The current 1553B data bus is widely used in military applications. It is a 16-bit architecture with a nominal throughput of 1 Mb/s. Many existing military avionics systems are compatible with the 1553, but most new commercial systems are not. New commercial and some military applications use the VME or PCI bus architectures, or proprietary solutions. Mil-Std 1553B was adopted in 1978 and served well, but bandwidth is becoming a limiting factor.
The Navy's Advanced Avionics Interconnect Technology program is focused on the development of extremely high speed and high bandwidth protocol independent optical data network based on COTS technologies and techniques. Technology leverages fiber optic technologies developed by the commercial telecommunications industry. This effort seeks to multiplex multiple signals using various protocols over a single optical fiber to replace current MIL-STD-1553 bus technology. The goals of this effort seek to increase data transfer rates by a factor of 1000X (1MB vs. 1GB or more); demonstrate reduced Electromagnetic Interference (EMI) and Electromagnetic Vulnerability (EMV); and reduced life cycle and development costs for F/A-18, JSF, Close Air Support (CSA) and other advanced air vehicles.
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