Preliminary

PLL502-21

384MHz – 768MHz Low Phase Noise PECL VCXO (12 – 24MHz Crystal)

47745 Fremont Blvd., Fremont, California 94538 TEL (510) 492-0990 FAX (510) 492-0991

Rev 08/10/01 Page 5

6. PECL Electrical Characteristics

PARAMETERS

SYMBOL

CONDITIONS

MIN.

MAX.

UNITS

Output High Voltage

V

Output Low Voltage

(see figure)

V

7. PECL Switching Characteristics

PARAMETERS

SYMBOL

CONDITIONS

MIN.

TYP.

MAX.

UNITS

Clock Rise Time

@20/80% - PECL

0.6

1.5

ns

Clock Fall Time

@80/20% - PECL

0.5

1.5

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