Clock Synthesizer with Differential SRC and CPU Outputs

CY28419

Rev 1.0, November 22, 2006

Page 1 of 15

2200 Laurelwood Road, Santa Clara, CA 95054

Tel:(408) 855-0555

Fax:(408) 855-0550

www.SpectraLinear.com

Features

• CK409B-compliant

• Supports Intel Pentium 4-type CPUs

• Selectable CPU frequencies

• 3.3V power supply

• Ten copies of PCI clocks

• Two copies 48 MHz clock

• Five copies of 3V66 with one optional VCH

• Four differential CPU clock pairs

• One differential SRC clock

• Ideal Lexmark Spread Spectrum profile for maximum

electromagnetic interference (EMI) reduction

• 56-pin SSOP package

CPU

SRC

3V66

PCI

REF

48M

x 4

x 1

x 5

x 10

x 2

x 2

Note:

1. Signals marked with [*] and [**] have internal pull-up and pull-down resistors, respectively.

Block Diagram

Pin Configuration

REF_0

REF_1

XIN

XOUT

VSS_REF

PCIF0

PCIF1

PCIF2

VDD_PCI

VSS_PCI

PCI0

PCI1

PCI2

PCI3

VDD_PCI

VSS_PCI

PCI4

PCI5

PCI6

PD#

3V66_0

3V66_1

VDD_3V66

VSS_3V66

FS_B

VDD_A

SDATA

VDD_SRC

SRCT

SRCC

VSS_SRC

CPUT0

CPUC0

VDD_CPU

CPUT1

CPUC1

VSS_CPU

CPUT2

CPUC2

VDD_CPU

CPUT3

FS_A

VSS_IREF

IREF

VSS_A

VTT_PWRGD#

3V66_2

3V66_3

SCLK

VDD_48

VSS_48

USB_48

3V66_4/VCH

56

55

54

53

52

51

50

49

48

47

46

45

44

43

42

41

40

39

38

37

36

35

34

33

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

32

31

30

29

VDD_REF

XTAL

PLL Ref Freq

XOUT

XIN

VDD_PCI

OSC

SCLK

PLL 1

Logic

VDD_48MHz

SDATA

VDD_3V66

Divider

Network

VDD_CPU

FS_(A:B)

PD#

REF0:1

VTT_PWRGD#

IREF

3V66_(0:3)

PCIF(0:2)

PCI(0:6)

DOT_48

3V66_4/VCH

2

PLL2

CPUT(0:3), CPUC(0:3)

VDD_SRC

SRCT, SRCC

USB_48

VDD_REF

DOT_48

CPUC3

[1]

SSOP-56