The DDC/North Hills DB40010 is a box-type, multi-stub data bus coupler engineered for MIL-STD-1553B and Notice 2 compliance. It delivers transformer-coupled stub connectivity with up to 8 ports, supporting stub voltages from 1.0 VPP to 14.0 VPP. The coupler maintains 55 dB common mode rejection and operates across -55°C to +125°C, making it suitable for airborne, military, and test environments where signal integrity and environmental protection are essential.
Technical Specifications
• Stub Ports: Up to 8 transformer-coupled ports
• Stub Voltage Range: 1.0 VPP to 14.0 VPP
• Turns Ratio: 1:1.41
• Nominal Line Impedance (Z₀): 78Ω
• Characteristic Resistance (R₁=R₂): 59Ω (1 watt per MIL-R-39007)
• Common Mode Rejection: 55 dB minimum
• Droop: 20% maximum at 250 kHz
• Overshoot and Ringing: +1.0V peak (250 kHz square wave, 100 ns max rise/fall time)
• EMI Resistance: High
• Operating Temperature: -55°C to +125°C
• Storage Temperature: -55°C to +150°C
– Key Features
• Solder-sealed, hot-tinned cold rolled steel case provides superior environmental, EMI, and corrosion protection
• MIL-E-15090 Light Blue Enamel finish (bottom surface unpainted)
• Fault protection: 59Ω + 1%, 1 Watt per MIL-R-39007
• Compact dimensions: 4.875″ × 1.500″ × 1.100″ (127.6 mm × 38.1 mm × 27.94 mm)
• All industry standard connectors
– Typical Applications
• Airborne data bus systems
• Military communications and control networks
• Test and development environments requiring multi-node connectivity
• Systems demanding high signal integrity in electromagnetically hostile environments
– Compatibility & Integration
Fully compliant with MIL-STD-1553B and Notice 2. Mechanical drawings and environmental qualification reports available upon request.
