VITESSE

SEMICONDUCTOR CORPORATION

2.488 Gb/s Quad

Data Re-timer

Target Specification

VSC8124

Page 2

© VITESSE SEMICONDUCTOR CORPORATION

741 Calle Plano, Camarillo, CA 93012 • 805/388-3700 • FAX: 805/987-5896

2/23/00

G52271-0, Rev. 1.14

VSC8124 Block Diagram

Clock

Recovery

Unit

Clock

Recovery

Unit

Clock

Recovery

Unit

Clock

Recovery

Unit

SD3+

SD3-

RDAT3+

RDAT3-

RDAT2+

RDAT2-

RDAT1+

RDAT1-

RDAT0+

RDAT0-

LOS

Logic

LOS3N

LOS2N

LOS1N

LOS0N

LOSALMN

SD0+

SD0-

SD1+

SD1-

SD2+

SD2-

REFCK0+

REFCK0-

PECL

CML

CML

CML

CML

TTL

TTL

TTL

TTL

CML

CML

LOSREL

REFCK1+

REFCK1-

PECL

REFCK+

TTL

0

1

TTL

1

0

TTL

RTBYP3

TTL

RTBYP2

1

0

TTL

FASTLOCK

TTL

RTBYP1

1

0

TTL

RTBYP0

1

0

CML

CML