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National Instruments Corporation
23
NI USB-6008/6009 User Guide and Specifications
Event Counter
Number of counters ...............................................1
Resolution ..............................................................32 bits
Counter measurements...........................................Edge counting (falling-edge)
Counter direction ...................................................Count up
Pull-up resistor .......................................................4.7 k
Ω
to 5 V
Maximum input frequency.....................................5 MHz
Minimum high pulse width....................................100 ns
Minimum low pulse width .....................................100 ns
Input high voltage ..................................................2.0 V
Input low voltage ...................................................0.8 V
Bus Interface
USB specification ..................................................USB 2.0 full-speed
USB bus speed .......................................................12 Mb/s
Power Requirements
USB
4.10 to 5.25 VDC
Typical....................................................80 mA
Maximum...............................................500 mA
USB suspend
Typical....................................................300
μ
A
Maximum...............................................500
μ
A
Physical Characteristics
Dimensions ............................................................Refer to Figure 16.
Without connectors ........................................63.5 mm
×
85.1 mm
×
23.2 mm
(2.50 in.
×
3.35 in.
×
0.91 in.)
With connectors .............................................81.8 mm
×
85.1 mm
×
23.2 mm
(3.22 in.
×
3.35 in.
×
0.91 in.)
