Options and Accessories

Clock

Data

The skew of the data output is held to "15 ns. The rising and falling times will depend on the buffer ICs, but neither is greater than 4 ns. See Figure 7'5. This figure shows the specifications for the waveform at the output connector when a cable is not being used.

Rise Time

Fall Time

Rise Time / Fall Time : Measure the time for the waveform to go from 10% to 90% of its peak value ; must be no greater than 4 ns.

Level High : 4 V ~

Level Low : ~ 0.8 V

Skew : Measure at 50% level of the waveform : must be no greater than " 15 ns.

Figure 7￿5:￿Output Waveform

Data

Clock

If a cable is used these waveforms have transmission distortion. It is neces' sary to latch the data with a clock before using the waveform in actual circuits at the cable receiving side (user side) and to reproduce the wave' form. Delay the clock with the delay line in order to reproduce the data reliably (see Figure 7'6).

12

 

12

Latch

12

Buffer

 

 

 

 

 

 

 

 

 

 

 

 

 

Delay Line

Buffer

0 ~ 20 ns

Figure 7￿6:￿Data Latching
7￿6

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