The DDC/North Hills RT500000 Terminator is a passive terminating component for MIL-STD-1553B data bus systems. It prevents signal reflections and maintains signal integrity by matching the bus impedance, and can be integrated into data bus couplers or deployed as a standalone termination module. The unit is constructed in a solder-sealed, hot-tinned cold rolled steel case rated for military environments across extended temperature ranges.
## Technical Specifications
• **Impedance:** 78 Ω nominal
• **Termination Resistor:** 76.8 Ω ± 1%
• **Fault Protection Resistance:** 59 Ω ± 1%
• **Isolation Resistors:** 0.75 Zo at 1 W minimum per MIL-R-39007
• **Power Rating:** 1 W per MIL-R-39007
• **Transformer Turns Ratio:** 1:1.41 ± 3%
• **Operating Temperature:** -55°C to 125°C
• **Storage Temperature:** -55°C to 155°C
• **Connector Type:** Trompeter PL-75-47 or equivalent
• **Weight:** 15 g (excluding cables)
• **Case:** Hot-tinned cold rolled steel
## Key Features
• Stub voltage capability: 1.0 V to 14.0 VPP transformer-coupled
• Maximum droop of 20% at 250 kHz
• Overshoot and ringing limited to +1.0 V peak under 250 kHz square wave input with 100 ns maximum rise and fall time
• Stub cable length limitation: 20 feet maximum between stub ports and equipment
## Typical Applications
• Airborne MIL-STD-1553 data bus networks
• Test and development environments requiring signal termination
• Direct integration into data bus coupler ports
## Compatibility & Integration
Full compatibility with MIL-STD-1553B and Notice 1/2. The terminator can be plugged directly onto coupler bus ports or integrated into internally terminated coupler designs.
