CY29976 datasheet(1/10 Pages) CYPRESS

No de pièce	CY29976

Description	3.3V, 125-MHz, Multi-Output Zero Delay Buffer

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Fabricant	CYPRESS [Cypress Semiconductor]

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3.3V, 125-MHz, Multi-Output Zero Delay Buffer

CY29976

Cypress Semiconductor Corporation

•

3901 North First Street

•

San Jose

•

CA 95134

•

408-943-2600

Document #: 38-07413 Rev. *A

Revised December 27, 2002

76

Features

• Output frequency up to 125 MHz

• Supports PowerPC®, and Pentium® processors

• 12 clock outputs: frequency configurable

• Configurable Output Disable

• Two reference clock inputs for dynamic toggling

• Oscillator or PECL reference input

• Spread spectrum compatible

• Glitch-free output clocks transitioning

• 3.3V power supply

• Pin compatible with SC973X

• Industrial temperature range: –40°C to +85°C

• 52-Pin TQFP package

Note:

1.

x = the reference input frequency, 200MHz < FVCO < 480MHz

.

Table 1. Frequency Table[1]

VC0_SEL

FB_SEL2

FB_SEL1

FB_SEL0

FVCO

0000

8x

0001

12x

0010

16x

0011

20x

0100

8x

0101

12x

0110

16x

0111

20x

1000

4x

1001

6x

1010

8x

1011

10x

1100

4x

1101

6x

1110

8x

1111

10x

Block Diagram

Pin Configuration

VSS

MR#/OE

SCLK

SDATA

FB_SEL2

PLL_EN

REF_SEL

TCLK_SEL

TCLK0

TCLK1

PECL_CLK

PECL_CLK#

VDD

VSS

QB0

VDDC

QB1

VSS

QB2

VDDC

QB3

FB_IN

VSS

FB_O UT

VDDC

FB_SEL0

1

2

3

4

5

6

7

8

9

10

11

12

13

39

38

37

36

35

34

33

32

31

30

29

28

27

14 15 16 17 18 19 20 21 22 23 24 25 26

52 51 50 49 48 47 46 45 44 43 42 41 40

CY29976

REF_SEL

0

1

0

1

Phase

Detector

VCO

LPF

Sync

Frz

D Q

QA0

Sync

Frz

D Q

Sync

Frz

D Q

Sync

Frz

D Q

Sync

Frz

D Q

Sync

Frz

D Q

Power-On

Reset

Output Disable

Circuitry

Data Generator

/2, /6, /4, /12

/2, /6, /4, /10

/8, /2, /6, /4

/4, /6, /8, /10

Sync Pulse

PECL_CLK

PECL_CLK#

TCLK0

TCLK1

TCLK_SEL

FB_IN

MR#/OE

SELA(0,1)

2

SELB(0,1)

2

SELC(0,1)

2

FB_SEL(0:2)

3

SCLK

SDATA

INV_CLK

QA1

QA2

QA3

QB0

QB1

QB2

QB3

QC0

QC1

QC2

QC3

FB_OUT

SYNC

12

VCO_SEL

PLL_EN

Numéro de pièce similaire - CY29976

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