Depending on if you are buying a component $400-$1800. IP Cores range from $15,000-$25,000. A software driver for MIL-STD-1553 usually around $22,000

Data Flow Documents (DFDs) are important because they help you visualize how data moves through your system, spot inefficiencies, and find opportunities to improve overall functionality.

MIL-STD-1553 operates over a multi-drop bus, which can sometimes be considered a linear topology. Here are some advantages of this bus configuration:

1. It is relatively easy to set up and extend.
2. The required cable length is minimal compared to other network topologies.
3. It is cost-effective, making it a budget-friendly option.
4. Multi-drop bus configurations are often used in small networks, especially in military and aerospace applications.

The Modbus protocol is an important protocol in the industrial IoT field. It boasts advantages such as simplicity, scalability, and wide applicability. However, its relatively slow speed and insufficient security need to be considered in practical applications.

MIL-STD-1553 data bus specification requires a shielded twisted pair cable with an impedance of 70–85 ohms at 1 MHz. The industry has standardized on a Twinax cable with a nominal characteristic impedance of 78 ohms, which is near the center of the specification range.

The MIL-STD-1553 standard uses Manchester II Bi-Phase encoding of all bits. The data rate is 1 MHz, implemented by a Manchester symbol rate of 2 Mbd.

For transmission, MIL-STD-1553 mandates a range of stub voltages between 6.0 and 9.0 volts peak-to-peak for direct-coupled stubs. For transformer-coupled stubs, the required voltage range is between 18.0 and 27.0 volts peak-to-peak.

MIL-STD-1553 also specifies receiver threshold voltages between 0.28 and 1.2 volts peak-to-peak for direct-coupled stubs and between 0.20 and 0.86 volts peak-to-peak for transformer-coupled stubs. In addition, terminal input impedance must be a minimum of 2,000 ohms for directed-coupled stubs and 1,000 ohms for transformer-coupled stubs.

Today, MIL-STD-1553’s application has gone further than the traditional domain of US Navy and Air Force aircraft. It include applications utilized in combat vehicles, missiles, ships, launch vehicles, satellites and the International Space Station Program. It’s also being used in some commercial aircraft applications.

MIL-STD-1553 uses twinax cables with a typical characteristic impedance of 78 ohms. This impedance is close to the center of the specification range of 70 to 85 ohms. The cables are often used with concentric twinax connectors, which have a center contact and an intermediate cylindrical inner shield contact.

MIL-STD-1553 will be around for a long time. This is due to its large installed base and the caution military programs exercise in using alternatives. The long history of the MIL-STD-1553, along with its high reliability from a reliable physical layer, familiar command/response protocol, and redundancy makes it a trusted choice.