Keysight W6600A-Series User manual

Keysight W6600A-Series
LPDDR4 BGA Interposers
Installation Guide

2Keysight W6600A-series LPDDR4 BGA Interposers Installation Guide
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Manual Part Number
W6601-97000
Edition
Second Edition, August 2017
Available in electronic format only
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Keysight W6600A-series LPDDR4 BGA Interposers Installation Guide 3
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.

4Keysight W6600A-series LPDDR4 BGA Interposers Installation Guide

Keysight W6600A-series LPDDR4 BGA Interposers Installation Guide 5
Contents
In This Guide 3
1 Introduction to W6600-Series Interposers
Compatibility with Logic Analyzer Modules 9
2 Introduction to W6601A LPDDR4 BGA Interposer
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

6Keysight W6600A-series LPDDR4 BGA Interposers Installation Guide
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

Keysight W6600A-series LPDDR4 BGA Interposers Installation Guide 7
Contents
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

8Keysight W6600A-series LPDDR4 BGA Interposers Installation Guide
Contents

Keysight W6600A-series LPDDR4 BGA Interposers
Installation Guide
1Introduction 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:
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.
W6600A-series Interposer Description
W6601A LPDDR4 BGA Interposer,
200-ball, 2-wings
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.
W6602A LPDDR4 RC BGA
Interposer, 200-ball, rigid
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.
NOTE
All W6600A-series interposers are tested for via connections through the interposer and
signal trace connectivity to the wing connections.

1 Introduction
10 Keysight W6600A-series LPDDR4 BGA Interposers Installation Guide

Keysight W6600A-series LPDDR4 BGA Interposers
Installation Guide
2Introduction 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
12 Keysight W6600A-series LPDDR4 BGA Interposers Installation Guide
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.
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.)
2 Flex wings with
ZIF connectors
Pin 1 Marking
NOTE
If the DRAM is used as two single x16 channel devices, then the W6601A interposer can
probe only CA signals from channel A.

Keysight W6600A-series LPDDR4 BGA Interposers Installation Guide 13
Introduction to W6601A LPDDR4 BGA Interposer 2
For probing signals under 2.5Gb/s, you can use the W6601A interposer with the U4164A module’s
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.
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
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.
Pin 1 Marking
NOTE
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.

2 Introduction to W6601A LPDDR4 BGA Interposer
14 Keysight W6600A-series LPDDR4 BGA Interposers Installation Guide
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.
Connector to connect
to the left flex wing of
the W6601A interposer
Two pods to connect
to the Logic Analyzer
pods

Keysight W6600A-series LPDDR4 BGA Interposers Installation Guide 15
Introduction to W6601A LPDDR4 BGA Interposer 2
U4209A 61-pin ZIF Probe / Cable (for Right Wing)
One U4209A probe cable is required to connect a W6601A interposer’s right wing to a U4164A Logic
Analyzer module.
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.
Connector to connect to the right flex
wing of the W6601A interposer
Two pods to connect to the Logic
Analyzer pods

2 Introduction to W6601A LPDDR4 BGA Interposer
16 Keysight W6600A-series LPDDR4 BGA Interposers Installation Guide
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)
Unlicensed base software with
additional licensing options
Base software platform for configuring and using Keysight’s logic
analyzer modules.
B4661A Memory Analysis Software Tools Package
version 6.30 or higher. (Required)
Includes unlicensed as well as
licensed features
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.
The below-mentioned licensed/unlicensed software features from the B4661A software package are required for W6601A.
Default LPDDR configuration files
(Required)
Available as an unlicensed standard
feature with the B4661A package.
Includes default XML configuration files for use with the W6601A
interposer.
DDR Setup Assistant and DDR Eyefinder software
version 6.30 or higher.
(Required)
Available as an unlicensed standard
feature with the B4661A package.
A wizard- like application to help you set up your U4164A logic
analyzer properly for use with the W6600A-series interposers.
DDR Custom Configuration Creator Tool version 6.30
or higher
(Required)
Available as an unlicensed standard
feature with the B4661A package.
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.
B4661A-2FP LPDDR Bus Decoder software version
6.30 or higher.
(Recommended)
Available as a licensed feature with
the B4661A package
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.
B4661A-3FP DDR 2/3/4 Protocol Compliance and
Analysis toolset version 6.30 or higher.
(Recommended)
Available as a licensed feature with
the B4661A package
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)
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.

Keysight W6600A-series LPDDR4 BGA Interposers Installation Guide 17
Introduction to W6601A LPDDR4 BGA Interposer 2
The following table displays the number of W6600-series interposers and cables required to provide
connections to channels of your logic analyzer module.
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.
DRAM Data Width Access to Number of Interposers Number of ZIF Probes Number of Logic Analyzer
Modules
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
One U4164A module

2 Introduction to W6601A LPDDR4 BGA Interposer
18 Keysight W6600A-series LPDDR4 BGA Interposers Installation Guide
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)

Keysight W6600A-series LPDDR4 BGA Interposers Installation Guide 19
Introduction to W6601A LPDDR4 BGA Interposer 2
W6601A Riser Dimensions
All dimensions are in inches.
W6601A Keep-Out Volume
NOTE
You must install the W6601A interposer on a riser (shipped with the interposer) or a grypper
socket to provide clearance to surrounding DRAM.

2 Introduction to W6601A LPDDR4 BGA Interposer
20 Keysight W6600A-series LPDDR4 BGA Interposers Installation Guide
Figure 6 KOV of a W6601A interposer