(Preliminary)

PL680-37/38/39

38-640MHz Low Phase Noise XO

47745 Fremont Blvd., Fremont, California 94538 Tel (510) 492-0990 Fax (510) 492-0991 www.phaselink.com Rev 11/28/05 Page 7

10. PECL Electrical Characteristics

PARAMETERS

SYMBOL

CONDITIONS

MIN.

MAX.

UNITS

Output High Voltage

V

Output Low Voltage

(see figure)

V

11. PECL Switching Characteristics

PARAMETERS

SYMBOL

FREQ.

CONDITIONS

MIN.

TYP.

MAX.

UNITS

Clock Rise & Fall Times

<150MHz

0.2

0.5

0.7

Clock Rise & Fall Times

>150MHz

<320MHz

0.2

0.4

0.55

Clock Rise & Fall Times

tr &tf

0.2

0.3

0.45

ns

OUT

OUT

50

Ω

50

Ω

PECL Levels Test Circuit

PECL Transistion Time Waveform

OUT

OUT

50%

20%

80%

t

R

t

F

VDD

DUTY CYCLE

45 - 55%

55 - 45%

50%

OUT

OUT

t

SKEW

PECL Output Skew

2.0V