CY2280PVC-11S Просмотр технического описания (PDF) - SpectraLinear Inc

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CY2280PVC-11S

100 MHz Pentium® II Clock Synthesizer/Driver with Spread Spectrum for Mobile or Desktop PCs

SpectraLinear Inc 

CY2280

Switching Characteristics[6, 7]

Parameter Output

t1

All

t2

CPUCLK,

APIC

Description

Output Duty Cycle[8]

CPU and APIC Clock

Rising and Falling Edge

Rate

Test Conditions

t1 = t1A y t1B

Between 0.4V and 2.0V

-1,-11S,

-21S

t2

PCICLK PCI Clock Rising and Between 0.4V and 2.4V

-1,-11S,

Falling Edge Rate

-21S

t2

USBCLK, USB, REF Rising and Between 0.4V and 2.4V

REF

Falling Edge Rate

t3

CPUCLK CPU Clock Rise Time Between 0.4V and 2.0V

-1,-11S,

-21S

t4

CPUCLK CPU Clock Fall Time Between 2.0V and 0.4V

-1,-11S,

-21S

t5

CPUCLK CPU-CPU Clock Skew Measured at 1.25V

t6

CPUCLK, CPU-PCI Clock Skew[9] Measured at 1.25V for 2.5V

-1,-11S,

PCICLK

clocks, and at 1.5V for 3.3V -21S

clocks

t7

PCICLK, PCI-PCI Clock Skew

Measured at 1.5V

PCICLK

t8

CPUCLK, CPU-APIC Clock

APIC

Skew[10]

Measured at 1.25V for 2.5V

clocks

-21S

t9

APIC

APIC-APIC Clock Skew Measured at 1.25V

t10

CPUCLK Cycle-Cycle Clock Jitter Measured at 1.25V

-1,-11S,

-21S

t11

PCICLK Cycle-Cycle Clock Jitter Measured at 1.5V

t12

CPUCLK, Power-up Time

PCICLK

CPU, PCI clock stabilization from

power-up

Notes:

7. All parameters specified with loaded outputs.

8. Duty cycle is measured at 1.5V when VDD = 3.3V. When VDD = 2.5V, duty cycle is measured at 1.25V.

9. PCI lags CPU for -11S and -21S options.

10. APIC lags CPU for -21S option.

Min.

45

1.0

Typ.

50

Max.

55

4.0

Unit

%

V/ns

1.0

4.0 V/ns

0.5

2.0 V/ns

0.4

1.6 ns

0.4

1.6 ns

100 175 ps

1.5

4.0 ns

250 ps

2.0

4.5 ns

100 175 ps

200 250 ps

250 500 ps

3 ms

Rev 1.0, November 25, 2006

Page 5 of 11

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