4

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PI6C490098

RevB

1/14/2016

PI6C490098

1:3 25MHz Clock Buffer

Symbol

Parameter

Conditions

Min.

Typ.

Max.

Units

Input Frequency

Fundamental Crystal

10

25

52

MHz

Input Clock

1

25

125

MHz

Output Rise Time

20% to 80% 25MHz, Note 1,

1

ns

Output Fall Time

80% to 20% 25MHz, Note 1,

1

ns

Duty Cycle

V

47

50

53

%

V

45

55

%

Output Frequency Synthesis Error

0

ppm

Clock Phase Jitter (RMS)

25MHz, Note 2

0.5

1.5

ps

Additive Jitter

25MHz, Note 3,

300

fs

1. Note 1: Measured with 7 pF lump load.

2. Note 2: 12 kHz to 20 MHz offset frequency using a crystal input.

3. Note 3: CLKIN input with X2 floating.

4. Note 4: Do not drive this device without a crystal or valid clock input

VDD

CLOAD (7pF lump load)

VDD

GND GND

CLK out

OUTPUTS

0.1µF

0.1µF

CMOS Test Configuration

C1

20pF

Crystal�(C

C2

20pF

X1

X2

Crystal Oscillator Circuit

PI6C490098

X1

X2

TCXO

Pull up and Pull down

resistors are optional

C=22nF

Input AC Coupling Application

16-0010