DDC / North Hills DB30010 Box-Type, Multi-Stub Data Bus Coupler

The DDC/North Hills DB30010 is a box-type, multi-stub data bus coupler engineered for MIL-STD-1553B applications. It provides transformer-coupled stub ports with controlled signal conditioning, droop limiting, and fault protection to maintain signal integrity across distributed avionic and test environments. The coupler’s solder-sealed, hot-tinned cold-rolled steel construction delivers superior environmental shielding, EMI rejection, and corrosion resistance across the full military temperature range.

## Technical Specifications

**Electrical Performance**
• Droop: 20% maximum at 250 kHz
• Overshoot and ringing: +1.0 V peak (250 kHz square wave, 100 ns max rise/fall time)
• Common mode rejection: -45.0 dB minimum at 1 MHz
• Turns ratio: 1:1.41
• Stub voltage: 1.0 VPP to 14.0 VPP (transformer coupled)
• Nominal line impedance (Z₀): 78 Ω
• Fault protection resistors (R1=R2): 59 Ω ±1%, 1 Watt per MIL-R-39007
• Operating temperature: -55°C to +125°C
• Storage temperature: -55°C to +150°C

**Physical Construction**
• Case material: 0.031 in. cold-rolled steel
• Base plate: 0.043 in. cold-rolled steel
• Finish: Hot tin dip with MIL-E-15090 light blue enamel
• Sealing: Solder-sealed for environmental and EMI protection

## Key Features

• Up to 8 transformer-coupled stub ports
• Meets MIL-STD-1553B and Notice 2 requirements
• Controlled droop and overshoot for signal fidelity
• Integrated fault protection per MIL-R-39007
• Sealed construction rated for airborne and harsh environments
• Available in higher temperature variants

## Typical Applications

• Avionic data bus installations
• Military-grade test and development platforms
• Multi-node distributed network interfaces
• Signal conditioning in MIL-STD-1553B systems

## Compatibility & Integration

Fully compliant with MIL-STD-1553B and Notice 2. NSN: 5985-01-354-4143.