CY28372OCT datasheet(1/17 Pages) SPECTRALINEAR

Part #	CY28372OCT

Description	SiS 746 AMD Athlon??AMD Duron??Clock Synthesizer

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Manufacturer	SPECTRALINEAR [SpectraLinear Inc]

Direct Link	http://www.spectralinear.com

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SiS 746 AMD Athlon™/AMD Duron™ Clock Synthesizer

CY28372

Rev 1.0, November 20, 2006

Page 1 of 17

2200 Laurelwood Road, Santa Clara, CA 95054

Tel:(408) 855-0555

Fax:(408) 855-0550

www.SpectraLinear.com

Features

• Supports AMD Athlon /Duron

CPU

• 3.3V and 2.5V power supply

• Eight copies of PCI clocks

• One 48-MHz USB clock

• Two copies of ZCLK clocks

• One 48 MHz/24 MHz programmable SIO clock

• One differential CPU clock (opendrain)

• One singled-ended CPU clock (opendrain)

• SMBus support with readback capabilities

• Spread Spectrum electromagnetic interference (EMI)

reduction

• 48-pin SSOP package

CPU

ZCLK

REF

PCI

AGP

IOAPIC

48M

24_48M

x 2

x 3

x 8

x 2

x 1

Block Diagram

Pin Configuration

VDD_REF

CPUT0, CPUC0

XTAL

PLL Ref Freq

XOUT

XIN

VDD_PCI

OSC

SCLK

PLL 1

I2C

Logic

VDD_48

SDATA

VDD_AGP

Divider

Network

VDD_CPU

**FS0:3

2

SSOP-48

REF0:2

AGP0:1

PCIF0:1

PCI0:5

48 MHz

24_48MHz

CPUT1

VDD_REF

**FS0/REF0

**FS1/REF1

REF2

GND_REF

XIN

XOUT

GND_Z

ZCLK0

ZCLK1

VDD_Z

*PCI_STP#

VDD_PCI

**FS2/PCIF0

*FS3/PCIF1

PCI0

PCI1

GND_PCI

VDD_PCI

PCI2

PCI3

PCI4

PCI5

GND_PCI

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

28

27

26

25

32

31

30

29

VDD_APIC

IOAPIC1

IOAPIC0

GND_APIC

CPU_STP#*

CPUT1

VDD_CPU

GND_CPU

CPUT0

CPUC0

VDD_CPU

GNDA

VDDA

SCLK

SDATA

PD#*

GND_AGP

AGP0

AGP1

VDD_AGP

VDD_48

48MHZ

24_48MHZ

GND_48

ZCLK0:1

VDD_Z

APIC0:1

VDD_APIC

PCI_STP#

CPU_STP#

* : Internal Pull-up 150k

** : Internal Pull-down 150k

Fract.

Aligner

PD#

PLL2

2

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