Keysight W6600A-Series, LPDDR4 Installation Manual

Keysight W6600A-Series
LPDDR4 BGA Interposers

Installation Guide

Notices

CAUTION

WARNING

© Keysight Technologies 2016, 2017

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Manual Part Number

W6601-97000

Edition

Second Edition, August 2017

Available in electronic format only

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Safety Notices

A CAUTION notice denotes a hazard. It
calls attention to an operating proce­dure, 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 pro­ceed beyond a CAUTION notice until
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met.

2 Keysight W6600A-series LPDDR4 BGA Interposers Installation Guide

In This Guide

This document provides installation information for the following Keysight products:

W6601A LPDDR4 BGA Interposer, 200-ball, 2-wings

U4208A 61-pin ZIF from left wing probe/cable (160 pin direct connect to LA).
This probe/cable is for use with the W6601A interposer.

U4209A 61-pin ZIF from right wing probe/cable (160 pin direct connect to LA)
This probe/cable is for use with the W6601A interposer.

W6602A LPDDR4 RC BGA Interposer, 200-ball, rigid

U4207A Zero ohm, 34 channels, Soft Touch Pro, single-ended probe/cable (160 pin direct connect to LA)
This probe/cable is for use with the W6602A interposer.

Keysight W6600A-series LPDDR4 BGA Interposers Installation Guide 3

4 Keysight W6600A-series LPDDR4 BGA Interposers Installation Guide

Contents

1 Introduction to W6600-Series Interposers

2 Introduction to W6601A LPDDR4 BGA Interposer

In This Guide 3

Compatibility with Logic Analyzer Modules 9

W6601A LPDDR4 BGA Interposer, 200-ball, 2-wings 12

Software Configurations 12
W6601A Technical Features Summary 13
W6601A Riser 13

U4208A 61-pin ZIF Probe / Cable (for Left Wing) 14

U4209A 61-pin ZIF Probe / Cable (for Right Wing) 15

Hardware and Software Requirements 16

Mechanical Considerations 18

W6601A Interposer Dimensions 18
W6601A Riser Dimensions 19
W6601A Keep-Out Volume 19

3 Introduction to W6602A LPDDR4 BGA Interposer

W6602A LPDDR4 RC BGA Interposer, 200-ball, Rigid 22

Software Configurations 23
W6602A Technical Features Summary 24
W6602A Riser 24

U4207A Zero ohm, 34 channels, Soft Touch Pro, Single-ended Probe/Cable 25

Hardware and Software Requirements 26

Mechanical Considerations 28

W6602A Interposer Dimensions 28
W6602A Riser Dimensions 29

4 W6600A-Series Interposers and Riser Soldering Guidelines

Recommended Soldering Guidelines 33

Soldering Steps 34

Interposer Fabrication Notes 36

Keysight W6600A-series LPDDR4 BGA Interposers Installation Guide 5

Contents

5 Setting up the W6601A Interposer

W6601A Interposer Setup - Overview 38

Step 1 - Soldering the W6601A Interposer 39

Step 2 - Connecting the W6601A Interposer to U4208A and U4209A Probe Cables 40

W6601A Interposer Wings Pinout 41

Step 3 - Connecting the U4208A and U4209A Probe Cables to a U4164A Logic
Analyzer 43

Logic Analyzer Channels to Signals Mapping 43
Signals not probed by the Logic Analyzer 45

6 Setting up the W6602A Interposer

W6602A Interposer Setup - Overview 48

Step 1 - Soldering the W6602A Interposer 49

Step 2 - Making Clock Qualifier Connections 50

W6602A Clock Connectors 50
U4207A Flying Leads Orientation 51

Step 3 - Connecting the W6602A Interposer to U4207A Probes 53

Step 4 - Connecting the U4207A Probe Pods to the Logic Analyzer Module Pods 54

For Two 16-bit Channels DRAM Configuration 54

For a Single 32-bit Channel DRAM Configuration 56

W6602A Interposer Footprints Pinout 58

W6602A Clock Connectors Pinout 59

W6602A Clock Qualifier and RESET Connections 60

Logic Analyzer Channels to Signals Mapping 61

Signals not probed by the Logic Analyzer 62

7 Setting Up the Logic Analyzer for W6600A-series Interposers

Before You Start 64

Loading a Configuration File 65

To save a configuration file 65

Troubleshooting Problems with Thresholds and Sample Positions Setup 66

8 Making Power Integrity Measurements using W6600A Series Interposers

Overview 68

Power Integrity Measurement Setup 68

6 Keysight W6600A-series LPDDR4 BGA Interposers Installation Guide

W6600A-Series Interposers Power Filter Capacitors 69

W6601A Power Filter Capacitors 69
W6602A Power Filter Capacitors 70

Correlating Power Integrity Measurements with Memory Analysis Measurements 71

9 Characteristics, Regulatory, Safety and Storage Information

Operating Characteristics 74

Storage, Inspection, Baking, and Cleaning Guidelines 75

Guidelines for Shelf Life and Solder-ability of W6600A-series Interposers 75
Cleaning of W6601A Interposer Gold Fingers 75

Regulatory Notices 76

WEEE Compliance 76
China RoHS 76

Index

Contents

Keysight W6600A-series LPDDR4 BGA Interposers Installation Guide 7

Contents

8 Keysight W6600A-series LPDDR4 BGA Interposers Installation Guide

Keysight W6600A-series LPDDR4 BGA Interposers

NOTE

Installation Guide

1 Introduction to W6600-Series

Interposers

The W6600A-series LPDDR4 BGA Interposers enable probing of 200-pin JEDEC standard footprint
directly at the ball grid array using the Keysight U4164A logic analyzer. These interposers provide
you:

• single touch probing of DQ signals

• capture of CA, Control, and DQ signals at data rates tested up to 3200MT/s.

• access to LPDDR4 DQ signals above 2.5Gb/s without double probe load by utilizing the Quad
Sampling features of a U4164A logic analyzer module.

A W6600A-series 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 W6600-series BGA
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 DRAM signal in the common footprint passes directly from the bottom side of the interposer to
the top side of the interposer.

Currently, in this series, Keysight provides the following interposers:

W6600A-series Interposer Description

W6601A LPDDR4 BGA Interposer,
200-ball, 2-wings

W6602A LPDDR4 RC BGA
Interposer, 200-ball, rigid

All probing including BGA interposers, become a part of the system under test when installed.
Maximum data rates and performance results will vary by systems under test, BGA rework, and
probing irregularities.

Compatibility with Logic Analyzer Modules

The W6600-series interposers are compatible with the Keysight U4164A AXIe-based logic analyzer
module.

All W6600A-series interposers are tested for via connections through the interposer and
signal trace connectivity to the wing connections.

A flexible interposer with two wings
Provides access to partial DQ signals and only one channel of CA signals on an LPDDR4 200
ball DRAM.
Refer to the chapter “Introduction to W6601A LPDDR4 BGA Interposer" on
page 11.

A rigid interposer
Provides access to all DQ and CA signals for both channels of an LPDDR4 200 ball DRAM.
Refer to the chapter “Introduction to W6602A LPDDR4 BGA Interposer" on
page 21.

1 Introduction

10 Keysight W6600A-series LPDDR4 BGA Interposers Installation Guide

Keysight W6600A-series LPDDR4 BGA Interposers

Installation Guide

2 Introduction to W6601A

LPDDR4 BGA Interposer

W6601A LPDDR4 BGA Interposer, 200-ball, 2-wings / 12
U4208A 61-pin ZIF Probe / Cable (for Left Wing) / 14
U4209A 61-pin ZIF Probe / Cable (for Right Wing) / 15
Hardware and Software Requirements / 16
Mechanical Considerations / 18

This chapter introduces the hardware components that are needed for the W6601A LPDDR4 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 the W6601A interposer.

2 Introduction to W6601A LPDDR4 BGA Interposer

2 Flex wings with
ZIF connectors

Pin 1 Marking

NOTE

W6601A LPDDR4 BGA Interposer, 200-ball, 2-wings

The W6601A interposer has two flexible wings, each with a set of fingers for Zero Insertion Force
(ZIF) connections that connect it to a U4208A or a U4209A 61-pin ZIF probe/cable. For the left wing
of the interposer, you use the U4208A probe/cable and for the right wing of the interposer, you use
the U4209A probe/cable. These cables are then connected to the U4164A Logic Analyzer module’s
pods.

The following figure shows a W6601A interposer’s top view.

Figure 1 W6601A Interposer

The W6601A interposer supports dual bank 16-bit data LPDDR4 200 ball DRAM that is being used as
a single 32-bit channel device. The interposer probes a subset of the DQ data lines of both banks of
such an LPDDR4 BGA 200 DRAM.

If the DRAM is used as two single x16 channel devices, then the W6601A interposer can
probe only CA signals from channel A.

This interposer is optimized to work with the U4164A logic Analyzer module to achieve higher data
rates with smaller KOV.

Software Configurations

The W6601A interposer can be used in the following three logic analyzer software configurations:

• 10 GHz Timing mode

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

• State mode over 2500 Mb/s (single edge clocking)

This interposer effectively utilizes the single touch probing and quad sampling features of the
U4164A logic analyzer module thereby allowing you to probe LPDDR4 DQ signals above 2.5Gb/s
without double probe load. (In quad sampling, four samples are captured per clock edge at two
different thresholds. Two samples are taken at each threshold.)

12 Keysight W6600A-series LPDDR4 BGA Interposers Installation Guide

For probing signals under 2.5Gb/s, you can use the W6601A interposer with the U4164A module’s

Pin 1 Marking

NOTE

dual clock edge clocking and dual sample mode instead of the quad sample mode. The U4164A
module’s dual sampling with dual thresholds allows you to capture separate Read and Write samples
per clock edge.

W6601A Technical Features Summary

• Probes a JEDEC LPDDR4 BGA 200 footprint. Maximum of 10 mm wide X 15 mm long LPDDR4
DRAM package can fit on top of the W6601A interposer without an additional riser or a socket to
provide clearance for the RC components.

• For the two flex wings of the interposer, the recommended bend radius is 2.5 mm (0.09") if flex is
bent at a rigid portion of the interposer.

• Logic analyzer connections are made using U4208A and U4209A ZIF probe cables. The
U4208A/U4209A ZIF connectors doors open on the top of the W6601A wings and away from
these wings.

• An isolation Tip Resistor (100 Ohms) and RC components network is present on the W6601A
interposer. No RC network present on the U4208A/U4209A probe cables. Also, there are no RCs
on the bottom of the interposer.

• Has a power plane and separate ground planes - 1.1 V (VDD2/VDDQ) and 1.8 V (VDD1).

• Also provides VDD and VDDQ power filter capacitors to allow you to make power integrity
measurements using the Keysight Power Rail probe and Infiniium S-series oscilloscope.

Introduction to W6601A LPDDR4 BGA Interposer 2

W6601A Riser

An LPDDR4 BGA 200 ball riser is provided with each W6601A 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 a riser that is provided with the W6601A interposer.

Figure 2 Riser that accompanies the W6601A interposer

The LPDDR 200 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.

To know how to solder the riser to the W6601A interposer and PC board, refer to the chapter

“W6600A-Series Interposers and Riser Soldering Guidelines" on page 31.

Keysight W6600A-series LPDDR4 BGA Interposers Installation Guide 13

2 Introduction to W6601A LPDDR4 BGA Interposer

Connector to connect
to the left flex wing of
the W6601A interposer

Two pods to connect
to the Logic Analyzer
pods

U4208A 61-pin ZIF Probe / Cable (for Left Wing)

One U4208A probe cable is required to connect a W6601A interposer’s left wing to a U4164A Logic
Analyzer module.

Figure 3 U4208A 61-pin ZIF probe cable

To know how to connect a W6601A interposer to a U4208A probe/cable, refer to the following topics
in this guide:

• “Step 2 - Connecting the W6601A Interposer to U4208A and U4209A Probe Cables" on page 40

To get information such as its characteristics, specifications, pinout, safety information, accessories,
and dimensions of the U4208A probe/cable, refer to the Keysight U4200A-Series Probes and Cables
User Guide (part number U4200-97000) available on www.keysight.com.

14 Keysight W6600A-series LPDDR4 BGA Interposers Installation Guide

U4209A 61-pin ZIF Probe / Cable (for Right Wing)

Connector to connect to the right flex
wing of the W6601A interposer

Two pods to connect to the Logic
Analyzer pods

One U4209A probe cable is required to connect a W6601A interposer’s right wing to a U4164A Logic
Analyzer module.

Introduction to W6601A LPDDR4 BGA Interposer 2

Figure 4 U4209A 61-pin ZIF probe cable

To know how to connect a W6601A interposer with a U4209A probe/cable, refer to the topic:

• “Step 2 - Connecting the W6601A Interposer to U4208A and U4209A Probe Cables" on page 40

To get information such as its characteristics, specifications, pinout, safety information, accessories,
and dimensions of the U4209A probe/cable, refer to the Keysight U4200A-Series Probes and Cables
User Guide (part number U4200-97000) available on www.keysight.com.

Keysight W6600A-series LPDDR4 BGA Interposers Installation Guide 15

2 Introduction to W6601A LPDDR4 BGA Interposer

Hardware and Software Requirements

Before you start installing the W6600A-series interposers, ensure that you have the following list of
hardware and software components needed for these interposers.

Hardware Requirements for W6601A

U4164A AXIe-based Logic Analyzer Module

M9502A 2-slot or M9505A 5-slot AXIe chassis to install the U4164A module

M9536A embedded controller or host PC with PCI express adapter card for the chassis

W6601A LPDDR4 Interposer(s)

U4208A 61-pin ZIF probe cables to connect the W6601A interposer to Logic Analyzer module
One cable needed for each interposer

U4209A 61-pin ZIF probe cables to connect the W6601A interposer to Logic Analyzer module
One cable needed for each interposer

Software Requirements Licensing Description

Logic and Protocol Analyzer software version 6.30 or
higher.
(Required)

B4661A Memory Analysis Software Tools Package
version 6.30 or higher. (Required)

The below-mentioned licensed/unlicensed software features from the B4661A software package are required for W6601A.

Default LPDDR configuration files
(Required)

DDR Setup Assistant and DDR Eyefinder software
version 6.30 or higher.
(Required)

DDR Custom Configuration Creator Tool version 6.30
or higher
(Required)

B4661A-2FP LPDDR Bus Decoder software version

6.30 or higher.
(Recommended)

B4661A-3FP DDR 2/3/4 Protocol Compliance and
Analysis toolset version 6.30 or higher.
(Recommended)

Unlicensed base software with
additional licensing options

Includes unlicensed as well as
licensed features

Available as an unlicensed standard
feature with the B4661A package.

Available as an unlicensed standard
feature with the B4661A package.

Available as an unlicensed standard
feature with the B4661A package.

Available as a licensed feature with
the B4661A package

Available as a licensed feature with
the B4661A package

Base software platform for configuring and using Keysight’s logic
analyzer modules.

Base software package that includes configuration files and tools
to help you perform DDR/LPDDR post-process as well as
real-time protocol compliance violation testing, decode and view
memory transactions, and set up your logic analyzer for
DDR/LPDDR data capture and analysis.

Includes default XML configuration files for use with the W6601A
interposer.

A wizard- like application to help you set up your U4164A logic
analyzer properly for use with the W6600A-series interposers.

Allows you to define the footprint layout as per your custom
probing solution used in the DDR/LPDDR setup and then create
an XML configuration file based on this footprint information.

Allows you to decode and view transactions, commands, and
data from a LPDDR1, LPDDR2, LPDDR3 or LPDDR4 SDRAM
memory bus in your device under test.

A set of tools to:

• evaluate and analyze the captured LPDDR data.

• perform real-time or post process compliance.

• set up a trigger on the specified address.

• graphically profile the distribution of memory accesses.

B4661A-4FP DDR 2/3/4 Memory Analysis Viewer
version 6.30 or higher.
(Recommended)

16 Keysight W6600A-series LPDDR4 BGA Interposers Installation Guide

Available as a licensed feature with
the B4661A package

A viewer installed and displayed within the Logic and Protocol
Analyzer GUI to analyze:

• memory traffic statistics.

• refresh rate and self-refresh periods.

• distribution of memory accesses.

• memory performance measurements.

Introduction to W6601A LPDDR4 BGA Interposer 2

NOTE

You can install the above-mentioned software components by downloading the required
executables from the Keysight web site at: www.keysight.com/find/lpa-sw-download.

The following table displays the number of W6600-series interposers and cables required to provide
connections to channels of your logic analyzer module.

DRAM Data Width Access to Number of Interposers Number of ZIF Probes Number of Logic Analyzer

LPDDR4 200 ball
DRAM used as a
single 32-bit
channel device

Dual bank 16 bit • Ck_A

• All Channel A CA and control
signals for Bank 0 and Bank 1

• All DBI signals

• Subset of DQS and DQ

signals from all byte lanes.

One W6601A One U4208A for the

left wing
One U4209A for the
right wing

Modules

One U4164A module

Keysight W6600A-series LPDDR4 BGA Interposers Installation Guide 17

2 Introduction to W6601A LPDDR4 BGA Interposer

Mechanical Considerations

W6601A Interposer Dimensions

The following figure shows the dimensions of a W6601A LPDDR4 BGA interposer.

Figure 5 Dimensions of a W6601A interposer (Top View)

18 Keysight W6600A-series LPDDR4 BGA Interposers Installation Guide

W6601A Riser Dimensions

NOTE

All dimensions are in inches.

Introduction to W6601A LPDDR4 BGA Interposer 2

W6601A Keep-Out Volume

You must install the W6601A interposer on a riser (shipped with the interposer) or a grypper
socket to provide clearance to surrounding DRAM.

Keysight W6600A-series LPDDR4 BGA Interposers Installation Guide 19

2 Introduction to W6601A LPDDR4 BGA Interposer

Figure 6 KOV of a W6601A interposer

20 Keysight W6600A-series LPDDR4 BGA Interposers Installation Guide

Keysight W6600A-series LPDDR4 BGA Interposers

Installation Guide

3 Introduction to W6602A

LPDDR4 BGA Interposer

W6602A LPDDR4 RC BGA Interposer, 200-ball, Rigid / 22
U4207A Zero ohm, 34 channels, Soft Touch Pro, Single-ended Probe/Cable / 25
Hardware and Software Requirements / 26
Mechanical Considerations / 28

This chapter introduces the hardware components that are needed for the W6602A LPDDR4 BGA
interposer setup. It also lists the software requirements as well as describes the mechanical
considerations such as various dimensions that you should know before you start setting up and
using the W6602A interposer.

3 Introduction to W6602A LPDDR4 BGA Interposer

NOTE

NOTE

W6602A LPDDR4 RC BGA Interposer, 200-ball, Rigid

The W6602A interposer is a rigid interposer that connects to U4207A zero ohm, Soft Touch Pro,
single-ended probes/cables. These cables are then directly connected to the U4164A Logic Analyzer
module’s pods.

The W6602A LPDDR4 BGA Interposer enables passive probing of 200-pin JEDEC standard footprint
directly at the ball grid array using the Keysight U4164A logic analyzers.

The W6602A interposer with the U4207A cable passively monitors the LPDDR4 200-ball DRAM
package. After tuning the Keysight logic analyzer, Command/Address bits can be reliably
captured up to 3200 MT/s using this interposer and cable. However, at some data rates, the logic
analyzer may not be able to provide an error-free capture of all DQ data bits.

The W6602A interposer can work in the following configurations of a 200 ball LPDDR4 DRAM:

• An LPDDR4 DRAM used as two 16-bit channels

• An LPDDR4 DRAM used as a single 32-bit channel

This interposer supports:

• probing of all CA and DQ/DQS signals for both channels of a 200 ball LPDDR4 DRAM.

• high speed data capture (data rates up to 3.2 Gb/s)

• lower system loading

If the DRAM is used as a single 32-bit channel device, then the W6602A interposer probes and
uses only one set of CA signals as the single channel 32-bit configuration implies that the two
CA channels on the DRAM are identical.

22 Keysight W6600A-series LPDDR4 BGA Interposers Installation Guide

Introduction to W6602A LPDDR4 BGA Interposer 3

J1 and J2 footprints to attach the interposer to U4207A
probes using retention modules

Pin 1
Marking

The following figure shows a W6602A interposer’s top view.

Figure 7 W6602A Interposer

The W6602A interposer has two connectorless footprints, J1 and J2 on its top side. A retention
module (shipped with the U4207A Soft Touch Pro probe) is soldered to each footprint. Each retention
module attaches to a U4207A probe. These probes are then connected to the Logic Analyzer
module’s pods.

Software Configurations

The W6602A interposer can be used in the following seven logic analyzer software configurations:

• 10 GHz Timing mode

• CHA State mode 16 DQ under 2500MT/s (double edge clocking)

• CHA State mode 16 DQ over 2500MT/s (single edge clocking)

• CHA State mode 32 DQ under 2500MT/s (double edge clocking)

• CHA State mode 32 DQ over 2500MT/s (single edge clocking)

• CHB State mode 16 DQ under 2500MT/s (double edge clocking)

• CHB State mode 16 DQ over 2500MT/s (single edge clocking)

This interposer effectively utilizes the single touch probing and quad sampling features of the
U4164A logic analyzer module thereby allowing you to probe LPDDR4 DQ signals above 2.5Gb/s
without double probe load. (In quad sampling, four samples are captured per clock edge at two
different thresholds. Two samples are taken at each threshold.) The Quad Sample State mode is only
available with the U4164A-02G licensed speed grade option.

For probing signals under 2.5Gb/s, you can use the W6602A interposer with the U4164A module’s
dual clock edge clocking and dual sample mode instead of the quad sample mode. Dual Sample
state mode supports data rates on LPDDR4 up to 2500MT/s and is available with the U4164A-01G
licensed speed grade option. The U4164A-02G licensed option supports all modes of operation and
the highest data rates.

Keysight W6600A-series LPDDR4 BGA Interposers Installation Guide 23

3 Introduction to W6602A LPDDR4 BGA Interposer

Pin 1 Marking

NOTE

W6602A Technical Features Summary

• Probes a JEDEC LPDDR4 BGA 200 footprint. Maximum of 10 mm wide X 15 mm long LPDDR4
DRAM package can fit on top of the W6601A interposer without an additional riser or a socket to
provide clearance for the RC components.

• Logic analyzer connections are made using U4207A Soft Touch Pro probe cables.

• RC components network is present on the top of the W6602A interposer. No RC network present
on the U4207A probe cables. Also, there are no RCs on the bottom of the interposer.

• The maximum non destructive input voltage for W6602A is 40 Vdc.

• Has a power plane and separate ground planes - 1.2 V (VDDQ) and 1.8 V (VDD1).

• Also provides VDD and VDDQ power filter capacitors to allow you to make power integrity
measurements using the Keysight Power Rail probe and Infiniium S-series oscilloscope.

W6602A Riser

An LPDDR4 BGA 200 ball riser is provided with each W6602A 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 a riser that is provided with the W6602A interposer.

Figure 8 Riser that accompanies the W6602A interposer

The LPDDR 200 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.

To know how to solder the riser to the W6602A interposer and PC board, refer to the chapter

“W6600A-Series Interposers and Riser Soldering Guidelines" on page 31.

24 Keysight W6600A-series LPDDR4 BGA Interposers Installation Guide