VITESSE

SEMICONDUCTOR CORPORATION

Advance Product Information

VSC7133

10-bit Transceiver for Fibre

Channel and Gigabit Ethernet

Page 8

© VITESSE SEMICONDUCTOR CORPORATION

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

1/17/00

G52187-0 Rev. 2.4

Figure 6: REFCLK Timing Waveforms

Table 4: Reference Clock Requirements

Parameter

Description

Min

Max

Units

Conditions

FR

Frequency Range

98

136

MHz

Range over which both transmit and

receive reference clocks on any link

may be centered

FO

Frequency Offset

-200

200

ppm.

Maximum frequency offset between

transmit and receive reference clocks

on one link

DC

REFCLK duty cycle

35

65

%

Measured at 1.5V

REFCLK rise and fall time

—1.5

ns.

REFCLKP

REFLKN