DE_S

MUX

LB1

EQ

EQ

EQ

DE_S

DEL _0

VCC

GND

RSV

EQS

EQL

Line Side

Switch Side

IN0 +-

IN1 +-

LB0

OUT0 +-

OUT1 +-

DE _L

DE_S

DEL_1

DES_0

DES_1

-

IN +

OUT+-

DE_L

Pre-emphasis

Control

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DS42MB100

SNLS244H – SEPTEMBER 2006 – REVISED JANUARY 2016

DS42MB100 4.25-Gbps 2:1/1:2 CML MUX/Buffer

With Transmit Pre-Emphasis and Receive Equalization

1 Features

3 Description

The DS42MB100 device is a signal conditioning 2:1

1

•

2:1 Multiplexer and 1:2 Buffer

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

•

0.25-Gbps to 4.25-Gbps Fully Differential Data

backplane-redundancy or cable driving applications.

Paths

Signal conditioning features include continuous time

•

Fixed Input Equalization

linear equalization (CTLE) and programmable output

pre-emphasis that enable data communication in FR4

•

Programmable Output Pre-Emphasis

backplane up to 4.25 Gbps. Each input stage has a

•

Independent Pre-Emphasis Controls

fixed equalizer to reduce ISI distortion from board

•

Programmable Loopback Modes

traces.

•

On-Chip Terminations

All output drivers have four selectable levels of pre-

•

ESD Rating of 6-kV HBM

emphasis to compensate for transmission losses from

long FR4 backplane or cable attenuation reducing

•

3.3-V Supply

deterministic jitter. The pre-emphasis levels can be

•

Lead-Less WQFN-36 Package

independently controlled for the line-side and switch-

•

–40°C to +85°C Operating Temperature Range

side drivers. The internal loopback paths from switch-

side input to switch-side output enable at-speed

2 Applications

system testing. All receiver inputs are internally

terminated

with

100-

Ω

differential

terminating

•

Backplane Drivers or Cable Drivers

resistors. All driver outputs are internally terminated

•

Redundancy and Signal Conditioning Applications

with 50-

•

CPRI/OBSAI

Device Information(1)

PART NUMBER

PACKAGE

BODY SIZE (NOM)

DS42MB100

WQFN (36)

6.00 mm × 6.00 mm

(1) For all available packages, see the orderable addendum at

the end of the data sheet.

Simplified Block Diagram

1

An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,

intellectual property matters and other important disclaimers. PRODUCTION DATA.