The DDC / North Hills DB20010 is a box-type, multi-stub data bus coupler engineered for MIL-STD-1553B avionics and military data transmission. This transformer-coupled unit connects multiple stubs to a main data bus while preserving signal integrity and suppressing reflections. Its solder-sealed, hot-tinned steel construction delivers superior EMI shielding and corrosion resistance across extreme operating temperatures.
## Technical Specifications
• Standard Compliance: MIL-STD-1553B and Notice 2
• Common Mode Rejection: >45 dB at 1 MHz
• Stub Voltage Range: 1.0 VPP to 14.0 VPP (transformer-coupled)
• Turns Ratio: 1:1.41
• Nominal Bus Impedance (Z₀): 78 Ω
• Fault Protection Resistors: 59 Ω ± 1%, 1 Watt per MIL-R-39007
• Droop: 20% maximum at 250 kHz
• Overshoot and Ringing: +1.0 V peak (250 kHz square wave, 100 ns rise/fall)
• Operating Temperature: −55°C to +125°C
• Storage Temperature: −55°C to +150°C
## Key Features
• Box-type construction with 0.031 in. cold-rolled steel walls
• 0.043 in. cold-rolled steel base plate
• Hot tin dip finish; MIL-E-15090 light blue enamel
• Solder-sealed enclosure for environmental and EMI protection
• Transformer-coupled stub ports for signal isolation
• Approximately 0.35 lbs weight
## Typical Applications
• Airborne data bus systems
• Military test and development platforms
• Aerospace avionics networks requiring MIL-STD-1553 compliance
• Industrial environments demanding high EMI immunity
## Compatibility & Integration
Designed exclusively for MIL-STD-1553B systems. Features industry-standard connectors typical of North Hills coupler products.
