The Eagle II NTDS Parallel I/O Interface is a MIL-STD-1397C compliant data transfer solution engineered for military and aerospace applications requiring deterministic communication between NTDS-compliant systems and parallel I/O devices. The interface operates across ISA, EISA, and PCI Express platforms, delivering full-duplex simultaneous input/output operations with configurable data transfer modes and on-board time-stamping capabilities.
Technical Specifications
NTDS Compliance & Standards
• MIL-STD-1397C compliant (Types A, B, C, and H)
• ISA bus compatible; EISA system software compatible
• PCI Express Base Specification, Revision 1.0a compatible (x1, x2, x4, x8, x16 slots)
Data Buffering Architecture
• Independent input and output FIFO buffers: 4 Kbyte each (1000 32-bit words per direction)
• Swift PCIe variant: 64K × 32-bit FIFO input buffer
Data Transfer & Timing
• Transfer modes: DMA, polled, and interrupt-driven
• Time stamp generator: 125 ns resolution per input word
• Full-duplex simultaneous I/O operation
• Software-selectable NTDS type (no hardware jumpers required on Swift PCIe variant)
Signal Integrity
• Differential NTDS receivers for noise immunity
• Short-circuit protected NTDS drivers
• Internal loopback test path (no cable disconnection required)
• Loopback test connector on Eagle II
Power Consumption
• Swift PCIe NTDS ABCH: 4.956 W average
Field Upgradeability
• FPGA-based architecture enables in-field feature updates and non-compliant interface compensation
– Key Features
• Autotransfer function for automatic NTDS input-to-output echoing (active tap implementations)
• Multi-interface time stamp synchronization capability
• Software-configurable settings (except base address and NTDS voltage)
• Single ISA slot requirement for standard variant
– Typical Applications
Naval tactical data systems (including U.S. Navy TAC-3/4 compatibility), real-time warfare systems, combat management systems, and distributed sensor networks requiring time-synchronized parallel data acquisition.
– Compatibility & Integration
Supports MIL-STD-1397C Types A, B, C, and H parallel I/O interfaces. Compatible with legacy ISA and EISA platforms as well as modern PCI Express infrastructure. Isolation tap box input: 90–240 VAC, 1 A maximum (IEC Publication 320 power cable).
