Keysight Technologies W3301A Manuel utilisateur

Keysight W3301A LPDDR3

BGA Interposers

Installation Guide

2Keysight W3301A LPDDR3 BGA Interposers Installation Guide

Notices

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Manual Part Number

W3301-97000

Edition

First Edition, October 2016

Available in electronic format only

Keysight Technologies

1900 Garden of the Gods Road

Colorado Springs, CO 80907 USA

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pursuant to the FAR and the DFARS and are

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Safety Notices

CAUTION

A CAUTION notice denotes a hazard. It

calls attention to an operating proce-

dure, practice, or the like that, if not

correctly performed or adhered to,

could result in damage to the product

or loss of important data. Do not pro-

ceed beyond a CAUTION notice until

the indicated conditions are fully

understood and met.

WARNING

A WARNING notice denotes a hazard.

It calls attention to an operating pro-

cedure, practice, or the like that, if not

correctly performed or adhered to,

could result in personal injury or

death. Do not proceed beyond a

WARNING notice until the indicated

conditions are fully understood and

met.

Keysight W3301A LPDDR3 BGA Interposers Installation Guide 3

In This Guide

This guide provides information on how to set up and use the following Keysight products in a

LPDDR3 probing setup:

• W3301A LPDDR3 178-ball, BGA Interposer

• E5406A/B Pro Series Soft Touch Connectorless Single-ended Probes

• U4201A 90-pin Cable Connectors (connects to the E5406A/B probes and Logic analyzer)

4Keysight W3301A LPDDR3 BGA Interposers Installation Guide

Keysight W3301A LPDDR3 BGA Interposers Installation Guide 5

Contents

In This Guide 3

1 Introduction to W3301A Interposers

W3301A LPDDR3 BGA Interposers - An Overview 8

Compatibility with Logic Analyzer Modules 9

Software Configuration 9

W3301A Technical Features Summary 9

W3301A Riser 9

E5406A/B Pro Series Soft Touch Connectorless Single-ended Probes 11

U4201A 90-pin Logic Analyzer Cable 12

Hard ware and Software Requirements 13

Mechanical Considerations 15

W3301A Interposer Dimensions 15

W3301A Riser Dimensions 16

W3301A Keep-Out Volume 16

2 W3301A Interposer and Riser Soldering Guidelines

Recommended Soldering Guidelines 21

Soldering Steps 22

Interposer Fabrication Notes 23

3 Setting up the W3301A Interposer

W3301A Interposer Setup - Overview 26

Step 1 - Soldering the W3301A Interposer 27

Step 2 - Connecting the W3301A Interposer to E5406A/B Probes 28

Step 3 - Connecting the E5408A/B Probe Pods to the U4201A Logic Analyzer Cable

Pods 30

Step 4 - Connecting the U4201A Cables to Logic Analyzer Module Pods 31

W3301A Interposer Connectorless Footprints Pinout 33

Logic Analyzer Channels to Signals Mapping 34

Signals not probed by the Logic Analyzer 35

6Keysight W3301A LPDDR3 BGA Interposers Installation Guide

Contents

4 Setting Up the Logic Analyzer for W3301A Interposers

Before You Start 38

Loading a Configuration File 39

To save a configuration file 39

5 Characteristics, Regulatory, Safety and Storage Information

Operating Characteristics 42

Storage, Inspection, and Baking Guidelines 43

Guidelines for Shelf Life and Solder-ability of W3301A Interposers 43

Regulatory Notices 44

WEEE Compliance 44

China RoHS 44

Index

Keysight W3301A LPDDR3 BGA Interposers

Installation Guide

1Introduction to W3301A Inter-

posers

W3301A LPDDR3 BGA Interposers - An Overview / 8

E5406A/B Pro Series Soft Touch Connectorless Single-ended Probes / 11

U4201A 90-pin Logic Analyzer Cable / 12

Hardware and Software Requirements / 13

Mechanical Considerations / 15

This chapter introduces the hardware components that are needed for a W3301A LPDDR3 BGA

interposer setup. It also lists the software requirements as well as describes the mechanical

considerations such as various dimensions and KOV that you should know before you start setting up

and using this interposer.

1 Introduction

8Keysight W3301A LPDDR3 BGA Interposers Installation Guide

W3301A LPDDR3 BGA Interposers - An Overview

The W3301A LPDDR3 BGA Interposer enables probing of 178-pin JEDEC standard footprint directly

at the ball grid array using the Keysight logic analyzers.

This interposer supports:

• probing of all CA and DQ/DQS signals between a single-channel x32 DRAM and a PC board.

• data rates up to 1.6 Gb/s

•smallerKOV

Using this interposer, you can capture LPDDR3 signals up to 1.6 Gb/s for a system under test that

can operate under probe load.

A W3301A interposer interposes between the DRAM being probed and the PC board where the

DRAM would normally be soldered. The interposer is designed to be soldered to the PCB footprint for

the DRAM on top of either the LPDDR riser included with the W3301A interposer or an optional

Grypper socket (not included with the interposer) or both. The DRAM being probed is then soldered

to the top side of the interposer.

Each LPDDR signal in the common footprint passes directly from the bottom side of the interposer to

the top side of the interposer.

The following figure shows a W3301A interposer’s top view.

Figure 1 W3301A LPDDR3 Interposer

NOTE

The W3301A interposer is tested for via connections through the interposer.

Keysight W3301A LPDDR3 BGA Interposers Installation Guide 9

Introduction 1

The W3301A interposer has two connectorless footprints, J1 and J2 on its top side. A retention

module (shipped with the E5406A/B Soft Touch Series Connectorless probe) is soldered to each

footprint. Each retention module attaches to an E5406A/B probe. These probes are then connected

to the U4201A Logic Analyzer 90-pin cable connectors which then connect to the Logic Analyzer

module’s pods.

Compatibility with Logic Analyzer Modules

The W3301A interposers are compatible with the following Keysight logic analyzer modules.

• U4164A AXIe-based logic analyzer modules

• U4154A/B AXIe-based logic analyzer modules

Software Configuration

The W3301A interposer can be used in the following logic analyzer software configuration:

• State mode under 2500 Mb/s (double edge clocking and dual sampling mode)

You can use the W3301A interposer with the compatible logic analyzer module’s dual clock edge

clocking and dual sample mode. The U4164A module’s dual sampling with dual thresholds allows

you to capture separate Read and Write samples per clock edge.

W3301A Technical Features Summary

• Probes a JEDEC LPDDR3 BGA 178 ball standard footprint. Maximum of 11 mm wide X 11.5 mm

long LPDDR3 DRAM package can fit on top of the W3301A interposer without an additional riser

or a socket to provide clearance for the RC components. A 13 mm wide X 13.5 mm long LPDDR3

DRAM package can also fit without a riser but will cover the silk screen marking and overlap vias

slightly.

• Logic analyzer connections are made using E5406A/B Pro Series Soft Touch Connectorless

Single-ended probes and U4201A logic analyzer cables. The E5406A/B probes attach to the

connectorless footprints on the top of the W3301A interposer using retention modules.

• An isolation Tip Resistor (100 Ohms) for each signal probed by the Logic Analyzer is present on

the top of the W3301A interposer. No RC network present on the E5406A/B probes or on the top

or bottom of the interposer.

W3301A Riser

An LPDDR3 BGA 178 ball riser is provided with each W3301A interposer to allow the interposer to

clear surrounding devices. Optionally, you can use a Grypper socket. It is not provided with the

interposer.

The following figure displays the riser that is provided with the W3301A interposer.

Figure 2 Riser that accompanies the W3301A interposer

1 Introduction

10 Keysight W3301A LPDDR3 BGA Interposers Installation Guide

To know how to solder the riser to the W3301A interposer and PC board, refer to the chapter

“W3301A Interposer and Riser Soldering Guidelines" on page 19.

NOTE

The LPDDR3 178 ball riser includes ground planes for optimal signal integrity. Due to these

ground planes, the riser’s alignment with the DRAM should be such that the TOP side of the

riser must point towards the DRAM and the Pin 1 indicator on the riser must orient towards the

“A1” pin of the DRAM.

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