Sital’s Weapon Bus Series: 16PP194 and H009 Products

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Sital’s Weapon Bus Solutions

Sital Technology offers an extensive array of solutions for the 16PP194 and H009 protocols, which are critical predecessors to the MIL-STD-1553 standard. These multi-drop data buses are integral to weapon systems. This includes the “Small Diameter Bomb” (SDB) which requires robust support through IP cores, transceivers, and boards tailored for these protocols.

Key Offerings for 16PP194 and H009

  • IP Core Support: Accompanied by VxWorks and Linux drivers, our IP core enhances system flexibility and performance.
  • Transceivers and Boards: Available with Windows drivers. These components ensure seamless integration into various system architectures.
  • Software Compatibility: Both hardware and software solutions are compatible with Sital’s MIL-STD-1553 API/library/driver and DDC’s 1553 components and AceXtreme API, facilitating easy adoption.


Integrated Solutions for 16PP194 and MIL-STD-1553

Many applications require the coexistence of 16PP194 and MIL-STD-1553 on the same physical data bus. Sital addresses this need by offering:

  • IP, Component, or Board-Level Solutions: For smooth operation of 1553 and WMUX protocols within a single system.
  • Efficient Controller Operation: Both the 1553 BC and WMUX CIU operate from the same node, simplifying system architecture and reducing hardware requirements.
  • Unified Message Scheduling: Enables the control of both protocols through a single software API, making operations efficient and preventing message collisions.


Detailed Insights into Weapon Bus Protocols

Weapon Bus 16PP194

The 16PP194 standard, also known as Weapons Mux or WMUX, is a critical data bus protocol developed by General Dynamics in the mid-1970s for use in F-16 stores (weapons) buses, operating alongside the MIL-STD-1553 standard. This protocol is designed to meet the specific needs of military avionics with a focus on reliability, speed, and compatibility. 16PP194 features:

Technical Specifications of 16PP194

16PP194 shares several technical aspects with MIL-STD-1553 but also introduces unique features to cater to its specific applications:

  • Terminal Coupling: Allows both direct and transformer-coupled terminals.
  • Transmitter Specifications:
    • Voltage: 7.3 to 9.9 volts peak-to-peak across 15 loads.
    • Rise and Fall Times: Less than 150 ns.
    • Ringing and Overshoot: Less than 0.5 volts peak-to-peak.
  • Receiver Requirements:
    • Must respond to 1.2 to 10.0-volts peak-to-peak signals.
    • Cannot respond to signals below 0.9 volts peak-to-peak.
    • Must operate with common mode voltages up to ±25 volts peak from 0 to 2 MHz without damage from common mode signals up to ±50 volts peak.
    • Input impedance must be ≥1300 ohms at 1 MHz when looking into the isolation transformer.

Data Bus Architecture of 16PP194

16PP194’s data bus system is designed to ensure efficient and secure communication:

  • Terminals: Includes CIU (Control Interface Unit) and RIUs (Remote Interface Units) for versatile operation.
  • Topology: Features two separate unidirectional (simplex) data buses; one for CIU to RIUs transmissions and another for RIUs to CIU communications.
  • Redundancy: Implements a backup data bus for enhanced reliability.
  • Data Rate and Encoding: Operates at 1 Mb/s with Manchester encoding, featuring a reversed encoding polarity from MIL-STD-1553.
  • Word Format: Utilizes a 26-bit word format, incorporating data, status, and GO/NOGO words with 4 μS gaps between words. The format includes a sync bit, RIU address and subaddress fields, a 16-bit data field, and an odd parity bit.


Weapon Bus H009

The H009 standard, crafted by McDonnell Douglas in the late 1960s, serves as a foundational communication protocol for F-15 avionics systems. This standard enables two-way data transmission between the Central Computer Complex (CCC) and peripheral units, facilitating synchronized operations across avionics networks.

Technical Specifications of H009

H009 is distinguished by its robust technical specifications designed to ensure reliable and secure communication:

  • Physical Layer: Utilizes a 68-ohm twisted/shielded cable for transmission, with specific requirements for clock and data signal isolation and encoding.
  • Clock Signal: Defined as a sinusoidal waveform, with transformer isolation to minimize interference.
  • Data Signal Transmission: Requires transformer coupling and Manchester encoding, with measures to limit harmonic content for clear signal transmission.
  • Voltage and Impedance: Stipulates a transmitted voltage of 20 ±4V peak-to-peak and mandates a 68-ohm impedance from transmitters.

Communication Protocol of H009

The H009 standard outlines a detailed protocol for message transmission to guarantee effective data flow and error management:

  • Message Structure: Introduces a 17-bit Select word to initiate communication, encompassing address, message type, control fields, and word count.
  • Peripheral Response: Dictates that peripherals respond within specific timeframes to maintain synchronization and signal acknowledgment.
  • Transmission Verification: Requires CCCs and peripherals to verify bit counts, word count, parity, and timing gaps.

Enhanced Transmission Reliability

To further bolster communication reliability and system responsiveness, H009 incorporates several safeguards:

  • Transmitter Requirements: After transmission, transmitters must maintain a low impedance state before switching to receive mode, facilitating a smooth transition between sending and receiving data.
  • Receiver Specifications: Peripherals and the CCC present a high impedance to the bus when in receive mode.
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    Weapon Bus Solutions

    Sital Technology manufactures a number of high-quality solutions for the 16PP194 and H009 Weapon Bus Protocols.

    Press on the desired type of solution you are looking for.

    MIL-STD-1553 Safe and Secure

    For most of its MIL-STD-1553 solutions, Sital offers an option for its Safe and Secure (SnS) Technology. By means of enhanced physical layer signal monitoring, Sital’s SnS provides continuous cyber authentication for detecting “spoofing” (or impersonating) nodes on 1553 buses. In addition, Sital’s SnS also provides electrical fault detection. This enables detection and locating of faults such as intermittent or continuous open or short circuits in data bus and stub cabling, couplers, connectors, connected LRUs and termination resistors.

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