User`s manual

Counter Section
*Note: Pins 21, 24, and 25 are pulled to logic high via 10K resistors.
50 ppmFrequency accuracy
10 MHzCrystal Oscillator Frequency
0.4 volts max @ 2.5 mAOutput Low
3.0 volts min @
−
2.5 mA
Output High
0.8 volts max,
−
0.5 volts absolute min
Input Low
2.0 volts min, 5.5 volts absolute maxInput High
50 ns minGate width low
50 ns minGate width high
50 ns minLow pulse width (clock input)
30 ns minHigh pulse width (clock input)
10 MHz maxClock input frequency
Available at main connector (pin 20)
Programmable as ADC Pacer clock.
Counter 3 Output
External source from main connector (pin 25*)Counter 3 Gate
(software enable/disable)
Counter 2 OutputCounter 3 Source
Internal only, chained to Counter 3 SourceCounter 2 Output
External source from main connector (pin 25*)Counter 2 Gate
(software enable/disable)
Internal 10 MHz
Internal 1 MHz Counter 2 Source
(jumper selectable)
Available at main connector (pin 2)Counter 1 Output
External gate from main connector (pin 24*) Counter 1 Gate
100 kHz internal source
External source from main connector (pin 21*)
Counter 1 Source (software selectable)
3 down-counters, 16 bits eachConfiguration
82C54Counter type
Environmental
0 to 95% non-condensingHumidity
−
40 to 100°C
Storage Temperature Range
0 to 70°C
Operating Temperature Range
Mechanical
PCI custom type card: 107mm H x 18.5mm W x 216 mm L Card dimensions
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