SI570 Datasheet, PDF(7/26 Page) Silicon Laboratories – ANY-RATE I2C PROGRAMMABLE XO/VCXO

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SI570 Datasheet, PDF (7/26 Pages) Silicon Laboratories – ANY-RATE I2C PROGRAMMABLE XO/VCXO

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Si570/Si571

Table 4. CLKÂ± Output Levels and Symmetry

Parameter

LVPECL Output Option1

LVDS Output Option2

Symbol

VOD

VSE

Test Condition

mid-level

swing (diff)

swing (single-ended)

mid-level

Min

VDD â 1.42

1.1

0.55

1.125

Typ

1.20

Max Units

VDD â 1.25 V

1.9

VPP

0.95

VPP

1.275

VOD

swing (diff)

0.5

0.7

0.9

VPP

CML Output Option2

VOD

mid-level

swing (diff)

VDD â 0.75

0.70

0.95

1.20

VPP

CMOS Output Option3

VOH

VOL

IOH = 32 mA

IOL = 32 mA

0.8 x VDD

VDD

0.4

LVPECL/LVDS/CML

Rise/Fall time (20/80%)

tR, tF

CMOS with CL = 15 pF

350

LVPECL: VDD â 1.3 V (diff)

Symmetry (duty cycle)

SYM LVDS: 1.25 V (diff)

CMOS: VDD/2

Notes:

1. 50 Î© to VDD â 2.0 V.

2. Rterm = 100 Î© (differential).

3. CL = 15 pF

Table 5. CLKÂ± Output Phase Jitter (Si570)

Parameter

Phase Jitter (RMS)*

for FOUT > 500 MHz

Phase Jitter (RMS)*

for FOUT of 125 to 500 MHz

Symbol

Test Condition

Min

ÏJ

12 kHz to 20 MHz (OC-48)

50 kHz to 80 MHz (OC-192)

ÏJ

12 kHz to 20 MHz (OC-48)

50 kHz to 20 MHz (OC-192)

*Note: Differential Modes: LVPECL/LVDS/CML. Refer to AN256 for further information.

Typ

0.25

0.26

0.36

0.34

Max

0.40

0.37

0.50

0.42

Units

Rev. 0.3

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