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

Input Structures

Two input structures exists in this part; TTL and High Speed, Differential Inputs. The TTL Inputs will inter-

face with any TTL or 3.3V or 5V CMOS outputs. The High Speed, Differential Inputs are intended to be AC

Coupled per the FC-PH specification. Being AC Coupled, the High Speed, Differential Input buffers are biased

at VDD/2. Refer to Figure 4, Input structures.

Figure 4: Input Structures

VDD +3.3 V

INPUT

Current

Limit

GND

REFCLK and TTL Inputs

A

VDD +3.3 V

INPUT

INPUT

All Resistors

3.3K

GND

High Speed Differential Input

(RXn+/-, SIn+/-)

B

G52180-0, Rev 4.0

10/23/00

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