Keysight Technologies W4630 Series User manual

Keysight W4630 and W4640
Series DDR4 BGA
Interposers
Installation Guide

2 Keysight W4630 and W4640 Series DDR4 DRAM BGA Interposers Installation Guide
Notices
© Keysight Technologies 2015
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tronic storage and retrieval or translation
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Manual Part Number
W4631-97000
Edition
Sixth Edition, December 2015
Available in electronic format only
Keysight Technologies
1900 Garden of the Gods Road
Colorado Springs, CO 80907 USA
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CAUTION
A CAUTION notice denotes a hazard. It
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dure, practice, or the like that, if not
correctly performed or adhered to,
could result in damage to the product
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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
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conditions are fully understood and
met.

Keysight W4630 and W4640 Series DDR4 DRAM BGA Interposers Installation Guide 3
In This Guide
This guide provides installation and usage information for the following Keysight DDR4 BGA
interposers and the cables used with these interposers.
DDR3 Probes
Keysight also offers equivalent probes for DDR3 memory:
• W3631A DDR3 x16 BGA address/control/data probe for stacked DRAM under 2G.
• W3633A DDR3 x4/x8 BGA address/control/data probe.
• W3636A DDR3 x16 non-stacked DRAM 96 ball BGA probe.
• E5845A adapter cable for W3631A and W3636A probes.
• E5847A adapter cable for W3633A probe.
• W3635B DDR3 oscilloscope probe adapter.
You can find installation and usage information for DDR3 probes in the Keysight W3630-Series
DDR3 DRAM BGA Probes Installation Guide (part number W3631-97004). The guide is available for
download on www.keysight.com.
W4630-series DDR4 DRAM BGA Interposers and cables
•W4633A DDR4 x4/x8 BGA Command and Data Interposer
•W4631A DDR4 x16 BGA Command and Data Interposer
•W4636A DDR4 x16 KOV BGA 2-Wings Command and Reduced Data Interposer
•E5849A High Data Rate Single-ended ZIF Cable (for use with the W4633A and W4631A interposers)
•E5847A High Data Rate Single-ended ZIF Cable (for use with the W4636A interposer)
W4640-series DDR4 DRAM BGA Interposers and cables
•W4643A DDR4 x4/x8 BGA 2-Wings Interposer
•W4641A DDR4 x16 BGA 2-Wings Interposer
•U4208A 61 pin ZIF for Left Wing, Probe/Cable Combination (for use with W4641A and W4643A interposers)
•U4209A 61 pin ZIF for Right Wing, Probe/Cable Combination (for use with W4641A and W4643A
interposers)

4 Keysight W4630 and W4640 Series DDR4 DRAM BGA Interposers Installation Guide

Keysight W4630 and W4640 Series DDR4 DRAM BGA Interposers Installation Guide 5
Contents
In This Guide 3
1 Introduction to W4630-Series Interposers
W4630 Series DDR4 BGA Interposers - An Overview 10
Compatibility with Logic Analyzer Modules 10
W4633A DDR4 x4/x8 BGA Interposer 11
W4633A Technical Features Summary 11
W4633A Riser and Optional Grypper Socket 12
W4631A DDR4 x16 BGA Interposer 13
W4631A Technical Features Summary 13
W4631A Riser and Optional Grypper Socket 14
W4636A DDR4 x16 KOV BGA 2-Wings Command and Reduced Data Interposer 15
W4636A Technical Features Summary 16
E5849A Single-ended ZIF Probe Cable 17
E5847A Single-ended ZIF Probe Cable 18
U4201A 90-pin Logic Analyzer Cables 19
Hard ware and Software Requirements 20
Mechanical Considerations 22
W4633A Interposer Dimensions 22
W4633A Keep-Out Volume 23
W4631A Interposer Dimensions 26
W4631A Keep-Out Volume 26
W4636A Interposer Dimensions 28
W4636A Keep-Out Volume 28
2 Introduction to W4640-Series Interposers
W4640-Series DDR4 BGA Interposers - An Overview 32
Compatibility with Logic Analyzer Modules 32
W4643A DDR4 x4/x8 BGA 2-Wings Interposer 33
W4643A Technical Features Summary 33
W4643A Riser and Optional Grypper Socket 34

6 Keysight W4630 and W4640 Series DDR4 DRAM BGA Interposers Installation Guide
Contents
W4641A DDR4 x16 BGA 2-Wings Interposer 35
W4641A Technical Features Summary 35
W4641A Riser and Optional Grypper Socket 36
U4208A 61-pin ZIF Probe / Cable (for Left Wing) 37
U4209A 61-pin ZIF Probe / Cable (for Right Wing) 38
Hard ware and Software Requirements 39
Mechanical Considerations 41
W4643A Interposer Dimensions 41
W4643A Riser Dimensions 41
W4643A Keep-Out Volume 42
W4641A Interposer Dimensions 44
W4641A Riser Dimensions 44
W4641A Keep-Out Volume 45
3 W4630-Series and W4640-Series Interposers and Riser Soldering Guidelines
Recommended Soldering Guidelines 49
Soldering Steps 50
Interposer Fabrication Notes 52
4 Setting up the W4633A Interposer
W4633A Interposer Setup - Overview 54
Soldering the W4633A Interposer and Riser 55
Connecting the W4633A Interposer to E5849A Probe Cables 56
W4633A Interposer Wings Pinout 58
Connecting the E5849A Probe Cables to a Logic Analyzer 60
Logic Analyzer Channel Mapping 60
Signals not probed by the Logic Analyzer 61
5 Setting up the W4631A Interposer
W4631A Interposer Setup - Overview 64
Mounting a W4631A Interposer on a PC Board using Riser and/or Sockets 65
Before Starting the Mounting Procedure 65
To mount the W4631A interposer on a PC board 66
Connecting the W4631A Interposer to E5849A Probe Cables 69
W4631A Interposer Wings Pinout 71

Keysight W4630 and W4640 Series DDR4 DRAM BGA Interposers Installation Guide 7
Contents
Connecting the E5849A Probe Cables to a Logic Analyzer 73
E5849A Cables to Logic Analyzer Pods Connection Mapping (for < 2.5 Gb/s Data Rates) 74
DDR4 x16 ZIF Cable to Logic Analyzer Pods Connection Mapping (for < and > 2.5 Gb/s Data
Rates) 74
Logic Analyzer Channel Mapping 74
Signals not probed by the Logic Analyzer 77
6 Setting up the W4636A Interposer
W4636A Interposer Setup - Overview 80
Soldering the W4636A Interposer 81
Connecting the W4636A Interposer to an E5847A Probe Cable 82
W4636A Interposer Wings Pinout 83
Connecting the E5847A Probe Cable to a Logic Analyzer 85
Logic Analyzer Channel Mapping 85
Signals not probed by the Logic Analyzer 86
7 Setting up the W4643A Interposer
W4643A Interposer Setup - Overview 90
Soldering the W4643A Interposer and Riser 91
Connecting the W4643A Interposer to U4208A and U4209A Probe Cables 92
W4643A Interposer Wings Pinout 93
Connecting the U4208A and U4209A Probe Cables to a U4164A Logic Analyzer 95
Logic Analyzer Channels to Signals Mapping 96
Signals not probed by the Logic Analyzer 97
8 Setting up the W4641A Interposer
W4641A Interposer Setup - Overview 100
Soldering the W4641A Interposer 101
Connecting the W4641A Interposer to U4208A and U4209A Probe Cables 102
W4641A Interposer Wings Pinout 103
Connecting the U4208A and U4209A Probe Cables to a U4164A Logic Analyzer 105
Logic Analyzer Channels to Signals Mapping 106
Signals not probed by the Logic Analyzer 107
9 Setting Up the Logic Analyzer for W4630-Series and W4640-Series Interposers
Before You Start 110

8 Keysight W4630 and W4640 Series DDR4 DRAM BGA Interposers Installation Guide
Contents
Loading a Configuration File 111
To save a configuration file 112
10 Characteristics, Regulatory, Safety and Storage Information
Operating Characteristics 114
Storage, Inspection, Baking, and Cleaning Guidelines 115
Guidelines for Shelf Life and Solder-ability of W4630-series and W4640-series Interposers 115
Cleaning of W4630-series and W4640-series Interposer Gold Fingers 115
Safety Information for the E5849A and E5847A Cable Adapters 116
To clean the instrument 116
Safety Symbols 116
Regulatory Notices 117
WEEE Compliance 117
China RoHS 117
Index

Keysight W4630 and W4640 Series DDR4 BGA Interposers
Installation Guide
1Introduction to W4630-Series
Interposers
W4630 Series DDR4 BGA Interposers - An Overview / 10
W4633A DDR4 x4/x8 BGA Interposer / 11
W4631A DDR4 x16 BGA Interposer / 13
W4636A DDR4 x16 KOV BGA 2-Wings Command and Reduced Data Interposer / 15
E5849A Single-ended ZIF Probe Cable / 17
E5847A Single-ended ZIF Probe Cable / 18
U4201A 90-pin Logic Analyzer Cables / 19
Hardware and Software Requirements / 20
Mechanical Considerations / 22
This chapter introduces the hardware components that are needed for a W4630-series 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 these
interposers.

1 Introduction
10 Keysight W4630 and W4640 Series DDR4 DRAM BGA Interposers Installation Guide
W4630 Series DDR4 BGA Interposers - An Overview
The W4630-series DDR4 DRAM BGA Interposers enable probing of embedded DDR4 DRAM (x4, x8,
and x16) directly at the ball grid array using the Keysight logic analyzers.
The DDR4 interposers interpose 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 DDR4 riser included with the W4630 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. Buried probe resistors placed at the DRAM balls connect the probed
signals to the rigid flex to mate with the E5849A/E5847A cables.
Currently, in this series, Keysight provides the following interposers:
• W4633A DDR4 x4/x8 BGA interposers with 78 balls riser
• W4631A DDR4 x16 BGA interposer with 96 balls riser
• W4636A DDR4 x16 KOV BGA 2-Wings Command and Reduced Data interposer for 96 balls
DDR4 DRAM
Compatibility with Logic Analyzer Modules
The W4630A series interposers are compatible with the following models of Keysight AXIe-based
logic analyzer modules.
• U4154A
• U4154B
• U4164A
NOTE
All W4630A series interposers are tested for via connections through the interposer and
signal trace connectivity to the wing connections.

Keysight W4630 and W4640 Series DDR4 DRAM BGA Interposers Installation Guide 11
Introduction 1
W4633A DDR4 x4/x8 BGA Interposer
The W4633A interposer has three flexible wings, each with a set of fingers for Zero Insertion Force
(ZIF) connections that connect it to the E5849A single-ended ZIF probe adapter cables. These
E5849A cables are then connected to the Logic Analyzer module’s pods via U4201A logic analyzer
cables.
The interposer comes with Resistor and Capacitor (RC) components installed on its top and bottom.
The following figure shows a W4633A DDR4 BGA interposer top side view, with RC components
installed.
Figure 1 W4633A DDR4 x4/x8 BGA Interposer
W4633A Technical Features Summary
• Probes a 78 ball DDR4 single channel x4 or x8 DRAM chip, JEDEC MO-207M footprint variation
DT-z. Maximum of 11 mm x 14 mm DDR4 DRAM package can fit on top of the W4633A interposer
without an additional riser or a socket to provide clearance for the RC components.
• RC components network on the W4633A interposer:
• ADD/CMD and half DATA RC on top of the interposer
• Remaining half DATA RC on bottom of the interposer
• GND plane on the bottom side of the three flex wings of the interposer.
• For the three flex wings of the interposer, the recommended bend radius is 1.27MM (0.05") if flex
is bent at a rigid portion of the interposer.
• Measurement timing skews within ±25 psec achieved by matched trace lengths from DDR4 balls
to test point.
• Logic analyzer connections are made using E5849A single ended ZIF probe cables. Doors of ZIF
connectors attach to the bottom side of flex wings of the interposer.
3 Flex wings with ZIF
connectors
Pin 1

1 Introduction
12 Keysight W4630 and W4640 Series DDR4 DRAM BGA Interposers Installation Guide
W4633A Riser and Optional Grypper Socket
A DDR4 78 ball riser is provided with each W4633A interposer to provide clearance for bottom-side
RC components on the interposer and 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 W4633A interposer.
Figure 2 Riser that accompanies the W4633A interposer
To know how to solder the riser to the interposer and PC board, refer to the topic “Soldering the
W4633A Interposer and Riser" on page 55.
Pin 1
NOTE
The DDR4 78 ball riser includes power and ground planes for optimal signal integrity. Due to
the power and ground planes, the riser is only compatible with DDR4 78 ball DRAM.

Keysight W4630 and W4640 Series DDR4 DRAM BGA Interposers Installation Guide 13
Introduction 1
W4631A DDR4 x16 BGA Interposer
The W4631A interposer has four flexible wings, each with a set of fingers for Zero Insertion Force
(ZIF) connections that connect it to the right or left wing of the E5849A single-ended ZIF probe
adapter cables. These E5849A cables are then connected to the Logic Analyzer module’s pods via
U4201A logic analyzer cables.
The interposer comes with Resistor and Capacitor (RC) components installed on its top and bottom.
The following figure shows a W4631A DDR4 BGA interposer top side view, with RC components
installed.
Figure 3 W4631A DDR4 x16 BGA Interposer
W4631A Technical Features Summary
• Probes a 96 ball DDR4 single channel x16 DRAM chip. Maximum of 12.5 mm x 19 mm DDR4
DRAM package can fit on top of the W4631A interposer without an additional riser or a socket to
provide clearance for the RC components.
• RC components network on the W4631A interposer:
• ADD/CMD and half DATA RC on top of the interposer
• Remaining half DATA RC on bottom of the interposer
• GND plane on the bottom side of the four flex wings of the interposer.
• For the four flex wings of the interposer, the recommended minimum bend radius is 2.5 mm if flex
is bent at a rigid portion of the interposer.
• Logic analyzer connections are made using E5849A single ended ZIF probe cables. Doors of ZIF
connectors attach to the bottom side of flex wings of the interposer.
4 Flex wings with ZIF
connectors
Pin 1 marking

1 Introduction
14 Keysight W4630 and W4640 Series DDR4 DRAM BGA Interposers Installation Guide
W4631A Riser and Optional Grypper Socket
A DDR4 96 ball riser is provided with each W4631A interposer to provide clearance for bottom-side
RC components on the interposer and 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 W4631A interposer.
Figure 4 Riser that accompanies the W4631A interposer
To know how to solder the riser to the interposer and PC board, refer to the topic “Mounting a
W4631A Interposer on a PC Board using Riser and/or Sockets" on page 65.
Pin 1 marking
CAUTION
The DDR4 96 balls riser includes power and ground planes for optimal signal integrity. Due to
the power and ground planes, the riser is only compatible with DDR4 96 ball DRAM.
Attaching this riser to a DDR3 target system can result in damaging the target system.

Keysight W4630 and W4640 Series DDR4 DRAM BGA Interposers Installation Guide 15
Introduction 1
W4636A DDR4 x16 KOV BGA 2-Wings Command and Reduced Data Interposer
The W4636A interposer probes a 96-balls DDR4 DRAM. When compared to the W4631A x16
interposer, W4636A offers two wings with limited signal access, reduced data rates, and a smaller
KOV.
This interposer is suitable for use in the following situations:
• For data rates up to and including 2.4 Gb/s.
• For capturing all ADD/CMD but partial DQ/DQS (DQ1-DQ7 are not routed). If you require access
to all ADD/CMD/DQ/DQS at data rates over 2.4 Gb/s, then you can use the W4633A x4/x8 and
W4631A x16 DDR4 BGA interposers.
• For minimal KOV in space-limited systems under test
The following figure shows a W4636A interposer’s top side view.
Figure 5 W4636A DDR4 x16 KOV BGA 2-Wings Command and Reduced Data Interposer
The W4636A interposer has two flexible wings, each with a set of fingers for Zero Insertion Force
(ZIF) connections that connect it to the right or left wing of the E5847A single-ended ZIF probe
adapter cables. These E5847A cables are then connected to the Logic Analyzer module’s pods via
U4201A logic analyzer cables.
In case of W4636A interposers, RC (resistor/capacitor) networks for logic analyzer probing are
present on the E5847A ZIF cables and not on the interposer.
2 Flex wings with ZIF
connectors
Pin 1 marking
NOTE
No riser is required with the W4636A interposer. The interposer shipment,
therefore, does not include any riser. You can optionally use a grypper
socket which is sold separately at:
http://www.hsiotech.com/products/ released-products/engineering-
products/grypper-family

1 Introduction
16 Keysight W4630 and W4640 Series DDR4 DRAM BGA Interposers Installation Guide
W4636A Technical Features Summary
• Probes a 96 ball DDR4 single channel x16 DRAM chip. Maximum of 12.5 mm x 19 mm DDR4
DRAM package can fit on top of the W4636A interposer.
• No RC components network on the W4636A interposer:
• For the two flex wings of the interposer, the recommended minimum bend radius is 1.27 mm if
flex is bent at a rigid portion of the interposer.
• Logic analyzer connections are made using E5847A single ended ZIF probe cables. Doors of ZIF
connectors attach to the top side of flex wings of the interposer.

Keysight W4630 and W4640 Series DDR4 DRAM BGA Interposers Installation Guide 17
Introduction 1
E5849A Single-ended ZIF Probe Cable
Two E5849A probe cables are required to connect a W4631A / W4633A interposer to a Logic
Analyzer module using U4201A logic analyzer cables.
Figure 6 E5849A Single-ended ZIF probe cable
To know how to make connections between a W4631A or a W4633A interposer and E5849A probe
cables, refer to the topics:
•“Connecting the W4631A Interposer to E5849A Probe Cables" on page 69
•“Connecting the W4633A Interposer to E5849A Probe Cables" on page 56
Right and left wings to connect to the
bottom side of the W4631A / W4633A
interposer wings
Three pods to connect to the U4201
Logic Analyzer cables

1 Introduction
18 Keysight W4630 and W4640 Series DDR4 DRAM BGA Interposers Installation Guide
E5847A Single-ended ZIF Probe Cable
One E5847A probe cable is required to connect a W4636A interposer to a Logic Analyzer module
using U4201A logic analyzer cables.
Figure 7 E5847A Single-ended ZIF probe cable
To know how to make connections between a W4636A interposer and an E5849A probe cable, refer
to the topic:
•“Connecting the W4636A Interposer to an E5847A Probe Cable" on page 82
Right and left wings to
connect to the W4636A
interposer wings
Three pods to
connect to the U4201
Logic Analyzer cables

Keysight W4630 and W4640 Series DDR4 DRAM BGA Interposers Installation Guide 19
Introduction 1
U4201A 90-pin Logic Analyzer Cables
The U4201A logic analyzer cable connects a E5849A or E5847A probe cable to a pod of the U4154A/B
AXIe-based logic analyzer module.
Figure 8 U4201A 90-pin logic analyzer cable
To know how to make connections between the U4201A cable and E5849A / E5847A probe cable,
refer to the topics:
•“Connecting the E5849A Probe Cables to a Logic Analyzer" on page 73 (for W4631A)
•“Connecting the E5849A Probe Cables to a Logic Analyzer" on page 60 (for W4633A)
•“Connecting the E5847A Probe Cable to a Logic Analyzer" on page 85 (for W4636A)
Connects to one of the pods of a Logic
Analyzer module
Connects to a pod of the E5849A or
E5847A ZIF probe cable

1 Introduction
20 Keysight W4630 and W4640 Series DDR4 DRAM BGA Interposers Installation Guide
Hardware and Software Requirements
Before you start installing the W4630-series probes, ensure that you have the following list of
hardware and software components needed for these probes.
The following table displays the number of W4630A-series BGA interposers and cable adapters
required to provide connections to channels of your logic analyzer module.
Hard ware Requirements
U4154A /B AXIe-based Logic Analyzer Module(s)
M9502A 2-slot or M9505A 5-slot AXIe chassis to install the U4154A module(s)
M9536A embedded controller or host PC with PCI express adapter card for the chassis
W4630A Series DDR4 BGA Interposer(s)
E5849A 46-ch single-ended ZIF probe cables to connect the W4631A or W4633A interposer to U4201A Logic Analyzer cables
Two E5849A cables needed for each interposer
E5847A 46-ch single-ended ZIF probe cables to connect the W4636A interposer to U4201A Logic Analyzer cables
One E5847A cable needed for each interposer
U4201A 90-pin Logic Analyzer cables to connect the E5849A or E5847A probe cables to U4154A/B module’s analysis pods
- Four U4201A cables needed for each W4633A interposer
- Four U4201A cables needed for each W4631A interposer.
- Three U4201A cables needed for each W4636A interposer.
Software Requirements Licensing Description
Logic and Protocol Analyzer software version 5.80 or higher.
(Mandatory)
Not Licensed Base software platform for configuring and using Keysight’s logic
analyzer modules.
B4621B DDR 2/3/4 Bus Decoder software version 5.80 or
higher.
(Recommended)
Licensed Allows you to decode and view transactions, commands, and data
from a DDR2, DDR3, or DDR4 memory bus in your target system.
B4622B DDR 2/3/4 Protocol Compliance and Analysis
toolset version 5.80 or higher.
(Recommended)
Licensed A set of tools to:
•evaluate and analyze the captured DDR data.
•perform real-time or post process compliance.
•set up a trigger on the specified address.
•graphically profile the distribution of memory accesses.
DDR Setup Assistant and DDR Eyefinder software version
5.80 or higher.
(Recommended)
Not Licensed A wizard- like application that helps you set up your U4154A logic
analyzer properly for DDR/LPDDR memory technologies State mode
measurements for ADD/CMD/DATA capture and analysis.
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.