| Technical specifications |
| Digital input/output |
| Digital type | 82C55 Emulation (mode 0 only) |
| Configuration | 2 banks of 8, 2 banks of 4, programmable by bank as input or output |
| Output | Ports A and B: 74HC245A
Port C: 74HC126 |
| Input | Ports A and B: 74HC245A
Port C: 74HC125 |
| Number of channels | 24 I/O |
| Switch state | Board silk screen reference: S1 – Default +5V |
| Output high | 3.3 V:
2.8 volts min @ -2.5 mA
Output low 0.3 volts max @ 2.5 mA
Input high 2.6 volts min, 3.6 volts absolute max
Input low 1.3 volts max, -0.5 volts absolute min |
| Output high | 5 V:
4.5 volts min @ -2.5 mA
Output low 0.3 volts max @ 2.5 mA
Input high 2.6 volts min, 5.5 volts absolute max
Input low 1.3 volts max, -0.5 volts absolute min |
| Power-up /reset state | Input mode (10 k? impedance from pull-up or pull-down) |
| Pull-up/pull-down resistors | EEPROM stored; software programmable driven by 74ACT244 through 10 k? bussed resistor networks (shipped in the pull-up state) |
| Interrupt enable | External (IRQ ENABLE, active low, disabled by default through internal resistor to TTL high) and programmable through PCI9030; 0 = disabled, 1 = enabled (default) |
| Interrupt sources | External source (IRQ INPUT), polarity programmable through PCI9030;
1 = active high, 0 = active low (default) |
| Power consumption |
| +3.3 V operating | 515 mA typ |
| +3.3 V with 5 V I/O | 520 mA typ |
| +VDIO User output | 125 mA max @ +5V; 375 mA max @ +3.3 V |
| Fuses | +VDIO User output and +12 V: Littelfuse 0.375A NANO2® Slo-Blo® Subminiature Surface Mount Fuse; art number 0452.375 |
| Environmental |
| Operating temperature range | 0 °C to 50 °C |
| Storage temperature range | –20 °C to 70 °C |
| Humidity | 0% to 90% non-condensing |
| Mechanical |
| Dimensions (L × W × H) | 167.4 × 111.2 × 18.72 mm (6.60 × 4.38 × 0.74 in.) |
| Bus |
| Bus Type | PCI Express 1.1 |
| Bus Width x1 lane | PCI Express |
