Appendix A
Specifications
NI PCI-1588 User Manual
A-2
ni.com
Output threshold
Output high......................................1.1 V min, 1.6 V typical for
50
Ω
load;
2.4 V min, 3.3 V typical for
1 M
Ω
load
Output low .......................................0.3 V max, 0 V typical for
50
Ω
load;
0.7 V max, 0 V typical for
1 M
Ω
load
Absolute maximum applied voltage
1
......±5.0 V, max
Future time to out time, t
CtoQ
..................1 to 4 ns, typical
Output-to-output skew, synchronous......<1 ns, typical
Output current.........................................±48 mA, max
Square wave rise/fall time
(10 to 90%) for 50
Ω
load .....................0.5 ns min,
2.5 ns max
RTSI Characteristics
RTSI <0..7> connector to timestamp......5 ns, typical
Future time event to RTSI <0..7>
connector output .....................................5 ns, typical
TCXO Characteristics
Frequency ...............................................10 MHz
Initial accuracy .......................................±1.5 ppm
Aging per year ........................................±1 ppm
Temperature stability (0 to 55 °C)
2
........±2 ppm
1
Stresses beyond those listed can cause permanent damage to the device. Exposure to absolute maximum rated conditions for
extended periods of time can affect device reliability. Functional operation of the device outside the conditions indicated in
the operational parts of the specifications is not implied.
2
Includes temperature stability of TCXO and supporting circuitry.
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