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3U cPCI Multifunction I/O Board, Gig-E Switch

The 75D4-H2 is a 3U cPCI I/O board that comes with a high-density I/O module slot pre-configured with the H2 Layer 2+ Gigabit Ethernet Switch module. This board operates at full 1000BASE-T speeds and consumes about 9.5 W of total power at 5V. In addition to the Ethernet switch, the motherboard also integrates four channels of RS232/423/422/485 serial communications. These channels can be accessed via the cPCI bus or optionally over Ethernet through one of the H2 switch ports.Thanks to its low-power consumption and high-performance capabilities, the 75D4-H2 is ideal for use in rugged defense, commercial aerospace, and industrial applications.


12-Port 10/100/1000Base-T, Layer 2, Switch Standards:
  • IEEE 802.3Ab (100BASE-T Gig-E)
  • IEEE 802.3u (100BASE-TX Fast Ethernet)
  • IEEE 802.3 (10BASE-T Ethernet)
  • IEEE 802.3x (Flow control/full and half duplex)

  • Broadcom® 53312S
  • Rear I/O support
  • Non-blocking Gigabit Ethernet fully integrated switch fabric with 4 Mb packet buffer memory
  • Integrated MACs (IEEE 802.x compliant) with support for 9600-byte jumbo frames
  • High-performance look-up engine with support for up to 8 K unicast MAC address entries
  • Automatic learning and aging tags
  • IPv4 and IPv6 traffic class support
  • Up to 12 ports available for external Ethernet communication/connectivity
  • 2 Ports (of 12) for motherboard and/or processor communication/connectivity (if supported)
  • Port segregating/partitioning options are available (i.e., separate 6/6 ports for 2x independent networks)
  • 4 integrated RS232/422/423/485 serial ports
  • For layer 3 support, please contact factory.

Block Diagram

The 75D4-H2 includes SSKs to support multiple operating systems. In addition, SSKs are supplied with source code and board-specific library I/O APIs to facilitate system integration.

Accelerate Your Time-to-Mission™ With COSA®

NAI’s Configurable Open Systems Architecture™ (COSA®) offers a choice of over 100 smart I/O, communication, and Ethernet switch functions, providing the highest package density and greatest flexibility of any multifunction I/O board in the industry. Preexisting, fully-tested functions can be combined quickly and easily in an unlimited number of ways. Choose the ideal platform for your application below. Each I/O function has dedicated processing, unburdening the system Single Board Computer (SBC) from unnecessary data management overhead.

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