September 2005

ASM5P2308A

rev 1.4

3.3V Zero Delay Buffer

3 of 18

Notice: The information in this document is subject to change without notice.

Zero Delay and Skew Control

All outputs should be uniformly loaded to achieve Zero Delay between input and output.

To close the feedback loop of the ASM5P2308A, the FBK pin can be driven from any of the eight available output pins. The

output driving the FBK pin will be driving a total load of 7pF plus any additional load that it drives. The relative loading of this

output (with respect to the remaining outputs) can adjust the input output delay. This is shown in the above graph.

For applications requiring zero input-output delay, all outputs including the one providing feedback should be equally loaded.

If input-output delay adjustments are required, use the above graph to calculate loading differences between the feedback

output and remaining outputs. For zero output-output skew, be sure to load outputs equally.

-30

-25

-20

-15

-10

-5

0

5

10

15

20

25

30

0

-500

-1000

-1500

500

1000

1500

Output Load Difference: FBK Load - CLKA/CLKB Load (pF)