Datasheet > DS42BR400

DS42BR400

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		/
页数	文件大小	规格书
14页	299K
描述
Quad 4.25 Gbps CML Transceiver with Transmit De-Emphasis and Receive Equalization

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DS42BR400 数据手册

March 27, 2008

DS42BR400

Quad 4.25 Gbps CML Transceiver with Transmit

De-Emphasis and Receive Equalization

General Description

Features

The DS42BR400 is a quad 250 Mbps – 4.25 Gbps CML

transceiver, or 8-channel buffer, for use in backplane and ca-

ble applications. With operation down to 250 Mbps, the

DS42BR400 can be used in applications requiring both low

and high frequency data rates. Each input stage has a fixed

equalizer to reduce ISI distortion from board traces. The

equalizers are grouped in fours and are enabled through two

control pins. These control pins provide customers flexibility

where ISI distortion may vary from one direction to another.

250 Mbps – 4.25 Gbps Fully Differential Data Paths

Optional Fixed Input Equalization

Selectable Output De-emphasis

Individual Loopback Controls

■

On-chip Termination

Lead-less eLLP-60 pin package (9 mm x 9 mm x 0.8 mm,

0.5 mm pitch)

−40°C to +85°C Industrial Temperature Range

6 kV ESD Rating, HBM

■

All output drivers have four selectable steps of de-emphasis

to compensate against transmission loss across long FR4

backplanes. The de-emphasis blocks are also grouped in

fours. In addition, the DS42BR400 also has loopback control

capability on four channels. All CML drivers have 50Ω termi-

nation to V_CC. All receivers are internally terminated with

differential 100Ω.

Applications

Backplane driver or cable driver

■

Signal repeating, buffering and conditioning applications

Simplified Application Diagram

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