VSC7123QN 查看數據表（PDF） - Vitesse Semiconductor

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VSC7123QN

10-Bit Transceiver for Fibre Channel and Gigabit Ethernet

Vitesse Semiconductor 

VELOCITYTM

VITESSE

SEMICONDUCTOR CORPORATION

10-Bit Transceiver for Fibre

Channel and Gigabit Ethernet

Figure 6: REFCLK Timing Waveforms

TL

TH

REFCLK

TR

TF

Data Sheet

VSC7123

VIH(MIN)

VIL(MAX)

Table 4: Reference Clock Requirements

Parameter

Description

FR

Frequency Range

FO

DC

TR,TF

Frequency Offset

REFCLK duty cycle

REFCLK rise and fall time

Min Max Units

Conditions

Range over which both transmit and

98 136 MHz receive reference clocks on any link may

be centered.

Maximum frequency offset between

-200 200 ppm transmit and receive reference clocks on

one link.

35

65

% Measured at 1.5V

—

1.5

ns

Between VIL(MAX) and VIH(MIN)

Page 8

© VITESSE SEMICONDUCTOR CORPORATION • 741 Calle Plano • Camarillo, CA 93012

Tel: (800) VITESSE • FAX: (805) 987-5896 • Email: prodinfo@vitesse.com

Internet: www.vitesse.com

G52212-0, Rev 4.3

03/25/01

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