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DSC557-04

Page 4

DSC557-04

Crystal-less Three Output PCIe Clock Generator

Pin Description (20 QFN)

Pin No.

Pin Name

Pin Type

Description

1

OE1

I

Output Enable; active high

2

NC

NA

Leave unconnected or grounded

3

VSS

Power

Ground

4

VSS

Power

Ground

5

CLK0-

O

Complement output of differential pair

6

CLK0+

O

True output of differential pair

7

CLK1-

O

Complement output of differential pair

8

CLK+

O

True output of differential pair

9

VDD

Power

Power Supply

10

NC

NA

Leave unconnected or grounded

11

OE2

I

Output Enable; active high

12

NC

NA

Leave unconnected or grounded

13

VSS

Power

Ground

14

VSS

Power

Ground

15

CLK2-

O

Complement output of differential pair

16

CLK2+

O

True output of differential pair

17

NC

NA

Package pin is Not Connected to internal IC or MEMS

18

NC

NA

Package pin is Not Connected to internal IC or MEMS

19

VDD

Power

Power Supply

20

NC

NA

Leave unconnected or grounded

Connection Diagram

(20 QFN Three HCSL Outputs)

1

2

3

4

5

6

7

8

9

10

18

19

20

15

16

17

OE2

NC

VSS

VSS

11

12

13

14

VSS

VSS

OE1

NC

20 QFN 5.0 x 3.2mm

1

2

3

4

5

6

7

11

12

13

14

8

9

10

20

19

18

17

16

15

+

VDD

-

0.01 uF

50

W

50

W

50

W

50

W

CLK0-

CLK0+

CLK1+

CLK1-

Ropt

50

W

50

W

CLK2+

CLK2-

+

Enable

-