Model: SBC519A

Manufactured by: Intel Corporation



  • 72 Programmable I/O Lines with Sockets for Interchangeable Line Drivers and Terminators

  • Full 16-Bit I/O Addressability

  • 3 SBX Connectors

  • 16 Maskable Interrupt Request Lines

  • Jumper Selectable 0.5, 1.0, 2.0 or 4.0 ms Interval Timer (real-time clock)

  • 8 Maskable Interrupt Request Lines with Priority Encoded and Programmable Interrupt Algorithms

  • I/O Expansion via Multibus Interface


The SBC519A Programmable I/O Expansion Board interfaces directly to any SBC single board computer via the system bus to expand input and output port capacity.  The SBC519A provides 72 programmable I/O lines.  The system software is used to configure the I/O lines to meet a wide variety of peripheral requirements. The flexibility of the I/O interface is further enhanced by the capability of selecting the appropriate combination of optional line drivers and terminators to provide the required sink current, polarity and drive/termination characteristics for each application.  Address selection is accomplished via wire-wrap jumpers.  The board operates with a single +5V power supply.


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