Part Number 777271-01 refers to the National Instruments PC-DIO-96 Digital I/O Board, which is designed for high-performance digital input/output applications. This board features 96 TTL-compatible digital I/O channels and adheres to a strict voltage rating of -0.5 to +5.5 V with respect to ground. The power-on configuration is preset to inputs within the high range and is selectable via jumper settings. Data transfer occurs through either interrupts or programmed I/O, allowing for efficient communication between the system and external devices.

The physical dimensions of the PC-DIO-96 are 6.5 by 3.9 inches, and it is equipped with a 100-pin male ribbon-cable I/O connector. It typically consumes 0.45 A of current at +5 VDC (±10%), with a maximum draw of up to 1 A. The board supports a maximum current output of 0.5 A from pins 49 and 99 at +5 V, and exhibits data transfer rates of up to 780 kbytes/s, although actual transfer rates may be significantly lower in typical high-level software environments.

The digital logic levels are defined as follows: input low voltage ranges from -0.3 V (minimum) to 0.8 V (maximum), while input high voltage ranges from 2.2 V (minimum) to 5.3 V (maximum). The maximum input low current at an input voltage of 0.8 V is -1.0 μA, and the maximum high input current at 2.4 V is 1.0 μA. Output specifications include a low output voltage ranging from 0 V (minimum) to 0.4 V (maximum) at an output current of 2.5 mA, and a high output voltage ranging from 3.7 V (minimum) to 5.0 V (maximum) at an output current of -2.5 mA.

The operating temperature for the PC-DIO-96 spans from 0 to 70 °C, with a storage temperature range of -55 to 150 °C. The board is designed to function effectively in environments with a relative humidity range of 5% to 90%. This robust set of features makes the National Instruments PC-DIO-96 a reliable solution for diverse digital I/O applications.