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GA1086MC500

11-Output Clock Buffer

TriQuint Semiconductor 

GA1086

Multi-Processor Systems (cont.)

Figure 5 shows a 4-processor system with various

33 MHz memory banks synchronized to the 66 MHz

CPUs. The GA1110E, a custom device whose six

outputs can be individually configured, (see

GA1110E data sheet), is used as the clock source for

the GA1086 devices. This configuration gives the user

18 copies of the 66 MHz clock and 7 copies of the 33

MHz clock. By using the configurability of the

GA1110E, the user can also specify and control the

placement of the edges of the outputs of the GA1110E.

Figure 5. Generating Multiple Outputs

R

33 MHz

FBIN FBOUT

GA1000

Q1

Q2

Q3

CLK

Q4

Q5

33 MHz

33M6H6zMHz

–t

3

– 2t

4 @ 33 MHz

– 3t

FBIN FBOUT

Q1

GA1086

6 pF

MC500

CLK

Q9

Q/2

R

Note: The GA1000 is a custom device whose outputs

can be customized to the user's requirement.

The figure above is one possible configuration.

Max Pin-to-Pin Skew from:

1 to 2 = 1.2 ns*

1 to 3 = 1.75 ns

1 to 4 = 1.5 ns

2 to 3 = 2.7 ns*

2 to 5 = 3.2 ns*

3 to 4 = 1.75 ns

3 to 5 = 2.7 ns*

4 to 5 = 1.2 ns*

FBIN FBOUT

Q1

GA1086

6 pF

MC500

CLK

Q9

Q/2

* Assumes maximum skew between Q9 and Q/2 is 1.2 ns. See AC specifications.

1

9 @ 66 MHz

2

33 MHz

4

9 @ 66 MHz

5

33 MHz

For additional information and latest specifications, see our website: www.triquint.com

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