Specifications |
Digital input/output |
Digital type |
82C55 |
Number of I/O |
24 (Port A0 through Port C7) |
Configuration |
2 banks of 8 and 2 banks of 4 or 3 banks of 8 or 2 banks of 8 with handshake |
Input low voltage |
0.8 V max |
Input high voltage |
2.2 V min |
Output low voltage |
(IOL = 2.5 mA) 0.5 V max |
Output high voltage |
(IOH = -2.5 mA) 2.4 V min |
Absolute maximum input voltage |
-0.5 V, +6 V |
Power-up / reset state |
Input mode (high impedance) |
Pull-up/pull-down resistors |
Dual footprint allows pull-up or pull-down configuration. |
Interrupts |
Interrupts |
INTA# - mapped to IRQn via PCI BIOS at boot-time |
Interrupt enable |
External (IRQ_ENABLE) active low, disabled by default through internal resistor to TTL high and programmable through PLX9030 |
Interrupt sources |
External source (IRQ_INPUT) Polarity programmable through PLX9030 Edge or level triggered programmable through PLX9030 Assertion time: 40 ns min |
Power consumption |
+5 V operating |
240 mA typical, 350 mA max. Does not include power consumed through the I/O connector. |
+5 V available at I/O connector |
300 mA max, protected with a resettable fuse |
Resettable fuse |
Raychem type miniSMDC110. Hold current: 1.1 A max Series resistance 0.21 Ohms max. |
Environmental |
Operating temperature range |
0 to 70°C |
Storage temperature range |
-40 to 100°C |
Humidity |
0 to 95% non-condensing |
Mechanical |
Card dimensions |
PCI length: 131.8 mm (L) x 106.7 mm (W) x 18.4 mm (H) |
Form factor |
Universal PCI keying. Compatible with either 3.3 V or 5 V PCI signaling environments. |