Datasheet > DS42MB200_07

DS42MB200_07

更新时间： 2024-11-23 03:30:35

品牌	Logo	应用领域
美国国家半导体 - NSC		复用器
页数	文件大小	规格书
16页	3196K
描述
Dual 4.25 Gbps 2:1/1:2 CML Mux/Buffer with Transmit Pre-Emphasis and Receive Equalization

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DS42MB200_07 数据手册

December 7, 2007

DS42MB200

Dual 4.25 Gbps 2:1/1:2 CML Mux/Buffer with Transmit Pre-

Emphasis and Receive Equalization

General Description

Features

The DS42MB200 is a dual signal conditioning 2:1 multiplexer

and 1:2 fan-out buffer designed for use in backplane redun-

dancy applications. Signal conditioning features include input

equalization and programmable output pre-emphasis that en-

able data communication in FR4 backplanes up to 4.25 Gbps.

Each input stage has a fixed equalizer to reduce ISI distortion

from board traces.

1– 4.25 Gbps fully differential data paths

■

Fixed input equalization

Programmable output pre-emphasis

Independent switch and line side pre-emphasis controls

Programmable switch-side loopback mode

On-chip terminations

All output drivers have 4 selectable steps of pre-emphasis to

compensate for transmission losses from long FR4 back-

planes and reduce deterministic jitter. The pre-emphasis lev-

els can be independently controlled for the line-side and

switch-side drivers. The internal loopback paths from switch-

side input to switch-side output enable at-speed system test-

ing. All receiver inputs and driver outputs are internally

terminated with 100Ω differential terminating resistors.

+3.3V supply

ESD rating HBM 6 kV

Lead-less LLP-48 package (7mmx7mmx0.8mm, 0.5mm

pitch)

■

–40°C to +85°C operating temperature range

■

Applications

Backplane driver or cable driver

■

Redundancy and signal conditioning applications

XAUI

Functional Block Diagram

20178633

201786

www.national.com

12 3 4 5 6 7...16

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