CY2220 データシートの表示（PDF） - Cypress Semiconductor

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CY2220

133-MHz Spread Spectrum Clock Synthesizer/Driver with Differential CPU Outputs

Cypress Semiconductor 

CY2220

Function Table[3]

SEL133

0

0

0

0

1

1

1

1

SELA

0

0

1

1

0

0

1

1

SELB

0

1

0

1

0

1

0

1

CPUCLK

(MHz)

100

N/A

N/A

Hi-Z

133

N/A

N/A

TCLK/2

MemRef

(MHz)

50

N/A

N/A

Hi-Z

66

N/A

N/A

TCLK/4

3V66CLK

(MHz)

66

N/A

N/A

Hi-Z

66

N/A

N/A

TCLK/4

PCICLK

(MHz)

33

N/A

N/A

Hi-Z

33

N/A

N/A

TCLK/8

USBCLK

(MHz)

48

N/A

N/A

Hi-Z

48

N/A

N/A

TCLK/2

REFCLK

(MHz)

14.318

N/A

N/A

Hi-Z

14.318

N/A

N/A

TCLK

Actual Clock Frequency Values

Clock

Output

CPUCLK

CPUCLK

USBCLK

Target

Frequency

(MHz)

100

133

48

CY2220-1

Actual Frequency

(MHz)

99.126

132.769

48.008

PPM

–8741

–1740

167

CY2220-2

Actual Frequency

(MHz)

100.227

133.269

48.008

PPM

+2270

+2022

167

Swing Select Functions

MultSel0

0

0

0

MultSel1

0

0

1

0

1

1

0

1

0

1

1

1

1

Board Target

60Ω

50Ω

60Ω

50Ω

60Ω

50Ω

60Ω

50Ω

Reference R, IREF =

Rr = 475 ± 1%,

Iref = 2.32 mA

Rr = 475 ± 1%,

Iref = 2.32 mA

Rr = 475 ± 1%,

Iref = 2.32 mA

Rr = 475 ± 1%,

Iref = 2.32 mA

Rr = 475 ± 1%,

Iref = 2.32 mA

Rr = 475 ± 1%,

Iref = 2.32 mA

Rr = 475 ± 1%,

Iref = 2.32 mA

Rr = 475 ± 1%,

Iref = 2.32 mA

Output

Current

IOH = 5*Iref

IOH = 5*Iref

IOH = 6*Iref

IOH = 6*Iref

IOH = 4*Iref

IOH = 4*Iref

IOH = 7*Iref

IOH = 7*Iref

VOH @ Z,

Iref = 2.32 mA

0.71 @ 60

0.59 @ 50

0.85 @ 60

0.71 @ 50

0.56 @ 60

0.47 @ 50

0.99 @ 60

0.82 @ 50

Clock Driver Impedances

Buffer Name

CPUCLK, CPUCLKB

VDD Range

Buffer Type

Type X1

USB, REF

3.135–3.465

Type 3

PCI, 3V66

3.135–3.465

Type 5

MemRef, MemRefB

3.135–3.465

Type 5

Note:

3. TCLK is a test clock driven in on the XTALIN input in test mode.

Document #: 38-07206 Rev. *A

Minimum

Ω

20

12

12

Impedance

Typical

Ω

40

30

30

Maximum

Ω

60

55

55

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