Abaco Systems / Ramix PMC676TX Dual Port GigE Controller

The Abaco Systems PMC676TX is a dual-port Gigabit Ethernet controller in single-slot PMC form factor, delivering two independent 10/100/1000Base-TX ports with RJ-45 connectors for embedded systems requiring network I/O. Each port features a dedicated DMA engine and 64 Kbyte FIFO buffer, enabling continuous full-bandwidth operation with minimal PCI overhead and deterministic behavior. The Intel 82546 MAC controller supports auto-negotiation, MDI/MDIX switch-over, jumbo frames, and full-duplex operation on both channels.

Technical Specifications

• 2 × 10/100/1000Base-TX ports with RJ-45 connectors


• Front-panel port routing


• Intel 82546 controller/MAC


• Auto-negotiation for speed and duplex


• MDI/MDIX switch-over capable


• Jumbo frame support


• Full-duplex operation per port PCI Bus Interface


• PCI-X and PCI 64/66 MHz specification


• 32/64-bit width, 33/66 MHz speed


• Dual DMA engine (one per port)


• 64 Kbyte FIFO buffer per port


• 3 V and 5 V signaling support Power Consumption


• Total: 6 W


• 3.3 V @ 0.9 A


• 5 V @ 0.6 A Environmental


• Operating: 0 to +60 °C, 5% to 95% RH (non-condensing)


• Storage: −40 to +85 °C, 5% to 95% RH (non-condensing)


• Conformal coating options: acrylic or polyurethane

Key Features

• 16 exact-match address filters for unicast/multicast


• 4096-bit hash filter for multicast frames


• Promiscuous unicast and multicast modes


• Hardware TCP checksum offloading


• Packet filtering based on checksum errors


• SNMP and RMON statistic counters


• MTBF: 245,000 hours (MIL-217-F Nav Shelf 25 °C)

Compatibility & Integration

• OS support: Windows, Linux, VxWorks, LynxOS, Solaris


• Solaris OBP and PXE boot options


• Compatible with GE Fanuc Embedded Systems PMC239 adapter for card-edge PCI systems