Figure 3-7. General-Purpose Timing Signals - National Instruments Corporation DAQCard-500 User Manual

Signal Connections
• Absolute maximum voltage input rating
• MSM82C54 digital input specifications (referenced to DGND):
– V input logic high voltage
IH
– V input logic low voltage
IL
– Input load current
• MSM82C54 digital output specifications (referenced to DGND):
– V output logic high voltage
OH
– V output logic low voltage
OL
– I output source current, at V
OH
– I output sink current, at V
OL
V
IH
CLK
V
IL
V
IH
GATE
V
IL
V
OH
OUT
V
OL
The GATE and OUT signals in Figure 3-7 are referenced to the rising edge of the CLK signal.
DAQCard-500 User Manual
OH
OL
t sc
t gsu
t gwh
t outg
t sc clock period
t pwh clock high level
t pwl clock low level
t gsu gate setup time
t gh gate hold time
t gwh gate high level
t gwl gate low level
t outc output delay from clock
t outg output delay from gate

Figure 3-7. General-Purpose Timing Signals

-0.5 to 5.0 V with respect to DGND
2.2 V minimum
0.8 V maximum
±10.0 µA maximum
3.0 V minimum
0.40 V maximum
2.5 mA maximum
2.5 mA maximum
t pwh
t gh
100 ns minimum
30 ns minimum
50 ns minimum
40 ns minimum
50 ns minimum
50 ns minimum
50 ns minimum
100 ns maximum
100 ns maximum
3-10 © National Instruments Corporation
Chapter 3
t pwl
t gwl
t outc