VSC7140 Просмотр технического описания (PDF) - Vitesse Semiconductor

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VSC7140

1.0625 Gb/s Fibre Channel Dual Repeater / Hub Node

Vitesse Semiconductor 

Data Sheet

VSC7140

VITESSE

SEMICONDUCTOR CORPORATION

1.0625 Gb/s Fibre Channel

Dual Repeater / Hub Node

AC Characteristics

Figure 3: AC Timing Diagrams

RXn,

SIn

SOn,

TXn

TP

TP

80%

20%

TS

TS

REFCLK

TT

TH

TL

TT

T

VIH(MIN)

VIL(MAX)

Table 1: AC Characteristics (Over recommended operating conditions).

Parameters

TP

TS

TT

F

Description

Differential Inputs/Outputs

Latency from Serial Input (RXn/

SIn) to Serial Output (TXn/SOn)

Differential Output Rise/Fall time

Reference Clock Requirements

REFCLK input rise/fall times

REFCLK Frequency

FO

DC

TH , TL

Frequency Offset

REFCLK Duty Cycle

REFCLK Input HIGH/LOW time

Min. Max. Units

Conditions

0.25 7.0

—

300

ns

ps Between 20% and 80%

—

2.0

ns Between VIL(MAX) and VIH(MIN)

105

52.5

108

54

MHz

106.25 MHz Nom.; REFSEL is HIGH

53.125 MHz Nom.; REFSEL is LOW

Maximum frequency offset between

-200 +200 ppm 10 or 20 times REFCLK and the

datarate of the serial input to the CRU.

35

65

% Measured at 1.5V

2.5

—

ns

From VIH(MIN) to VIH(MIN) or

VIL(MAX) to VIL(MAX)

G52180-0, Rev 4.0

10/23/00

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

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

Internet: www.vitesse.com

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