SM802111 データシートの表示（PDF） - Micrel

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SM802111

ClockWorks™ GbE Dual 125MHz Ultra-Low Jitter, LVPECL Frequency Synthesizer

Micrel 

Micrel, Inc.

SM802111

Ref_IN DC Electrical Characteristics(4)

VDD = 3.3V ±5% or 2.5V ±5%, TA = –40°C to +85°C.

Symbol Parameter

Condition

VIH

Input High Voltage

VIL

Input Low Voltage

IIN

Input Current

VDD = 3.465V, VIN = 0V to VDD

Min.

1.1

−0.3

−5

Typ.

Max.

VDD + 0.3

0.6

5

Units

V

V

μA

AC Electrical Characteristics(4, 5)

VDD = VDDO = 3.3V ±5% or 2.5V ±5%

VDD = 3.3V ±5%, VDDO = 3.3V ±5% or 2.5V ±5%

TA = −40°C to +85°C; RL = 50Ω to VDDO − 2V

Symbol Parameter

Condition

FOUT

Output Frequency

FREF

Reference Input Frequency

TR/TF

LVPECL Output Rise/Fall Time 20% – 80%

ODC

Output Duty Cycle

TSKEW

Output-to-Output Skew

Note 6

TLOCK

Tjit(∅)

PLL Lock Time

RMS Phase Jitter (7)

Spurious Noise Components

Output = 125MHz Integration

Range (1.875MHz – 20MHz)

5MHz

Min.

80

48

Typ.

125

15

175

50

85

-73

Max.

350

52

45

20

Units

MHz

MHz

ps

%

ps

ms

fs

dBc

Notes:

5. All phase-noise measurements were taken with an Agilent 5052B phase-noise system.

6. Defined as skew between outputs at the same supply voltage and with equal load conditions; Measured at the output differential crossing points.

7. Ref_IN driven with a low-noise source ClockWorks SM802001 programmed for a 15MHz CMOS output. Phase noise will track the input phase

noise up to about 1MHz offset frequency.

April 2011

4

M9999-041111-A

hbwhelp@micrel.com or (408) 955-1690

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