Measurement Computing PCIM-DAS1602/16 - Manual (Page 25)

PCIM-DAS1602/16 User's Guide Specifications
Counter
Counter type 82C54
Configuration 3 down counters, 16 bits each
Counter 1 source
(software selectable) ! External source from main connector (pin 21*)
! 100 kHz internal source
Counter 1 gate External gate from main connector (pin 24*)
Counter 1 output Available at main connector (pin 2)
Counter 2 source
(jumper selectable) ! Internal 1 MHz
! Internal 10 MHz
Counter 2 gate
(software enable/disable) External source from main connector (pin 25*)
Counter 2 output Internal only, chained to counter 3 source
Counter 3 source Counter 2 output
Counter 3 gate
(software enable/disable) External source from main connector (pin 25*)
Counter 3 output Available at main connector (pin 20)
Programmable as ADC Pacer clock.
Clock input frequency 10 MHz max
High pulse width (clock input) 30 ns min
Low pulse width (clock input) 50 ns min
Gate width high 50 ns min
Gate width low 50 ns min
Input high 2.0 volts min, 5.5 volts absolute max
Input low 0.8 volts max, -0.5 volts absolute min
Output high 3.0 volts min @ -2.5 mA
Output low 0.4 volts max @ 2.5 mA
Crystal oscillator frequency 10 MHz
Frequency accuracy 50 ppm
* Pins 21, 24, and 25 are pulled to logic high via 10K resistors.
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 custom type card: 107 mm (H) x 18.5 mm (W) x 216 mm (L)
5-5