| Specifications |
| Power consumption |
| +5V operating | 240 typical, 350 max |
| Digital input/output |
| Digital type | 82C55 |
| Configuration | 2 banks of 8, 2 banks of 4, programmable by bank as input or output |
| Number of channels | 24 I/O |
| Output high | 3.7 volts min @ -2.5 mA |
| Output low | 0.4 volts max @ 2.5 mA |
| Input high | 2.2 volts min, 5.3 volts absolute max |
| Input low | 0.8 volts max, -0.3 volts absolute min |
| Power-up/reset state | Input mode (high impedance) |
| Interrupts | INTA# - mapped to IRQn via PCI BIOS at boot-time |
| Interrupt enable | External (IR ENABLE, active low, disabled by default through internal resistor to TTL high) and programmable through PCI9052; 0 = disabled, 1 = enabled (default) |
| Interrupt sources | External source (IR INPUT), polarity programmable through PCI9052;
1 = active high, 0 = active low (default) |
| Environmental |
| Operating temperature range | 0 to 50 °C |
| Storage temperature range | -20 to 70 °C |
| Humidity | 0 to 90% non-condensing |
