Keysight W4630 Series User manual

Keysight W4630 Series
DDR4 BGA Interposer
Installation Guide

2Keysight W4630 Series DDR4 DRAM BGA Interposers Installation Guide
Notices
© Keysight Technologies 2014
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Manual Part Number
W4631-97000
Edition
Second Edition, October 2014
Available in electronic format only
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met.

Keysight W4630 Series DDR4 DRAM BGA Interposers Installation Guide 3
In This Guide
This document provides installation information for the following Keysight products:
• W4633A DDR4 x4/x8 BGA Command and Data Interposer
• E5849A High Data Rate Single-ended ZIF Cable (for use with the W4633A interposer)

4Keysight W4630 Series DDR4 DRAM BGA Interposers Installation Guide

Keysight W4630 Series DDR4 DRAM BGA Interposers Installation Guide 5
Contents
In This Guide 3
1 Introduction
W4630 Series DDR4 BGA Interposer - Introduction 8
W4633A DDR4 x4/x8 BGA Interposer 8
Riser and Optional Grypper Socket 9
E5849A Single-ended ZIF Probe Cable 10
U4201A 90-pin Logic Analyzer Cables 11
Hard ware and Software Requirements 12
Mechanical Considerations 13
W4633A Interposer Dimensions 13
Keep-Out Volume 14
DDR3 Probes 17
2 Setting up the W4630-Series Interposers
W4633A Interposer Setup - Overview 20
Soldering the W4633A Interposer and Riser 21
Interposer and Riser Soldering Guidelines 21
Interposer Fabrication Notes 22
Connecting the W4633A Interposer to E5849A Probe Cables 23
W4633A Interposer Wings Pinout 25
Connecting the E5849A Probe Cables to a Logic Analyzer 27
Logic Analyzer Channel Mapping 27
Signals not probed by the Logic Analyzer 28
3 Setting Up the Logic Analyzer for W4630 Series Probes
Before You Start 30
Loading a Configuration File 31
To save a configuration file 31
4 Characteristics, Regulatory, Safety and Storage Information
Operating Characteristics 34

6Keysight W4630 Series DDR4 DRAM BGA Interposers Installation Guide
Contents
Storage, Inspection, Baking, and Cleaning Guidelines 35
Guidelines for Shelf Life and Solder-ability of W4633A Interposers 35
Cleaning of W4633A Interposer Gold Fingers 35
Safety Information for the E5849A Cable Adapters 36
To clean the instrument 36
Safety Symbols 36
Regulatory Notices 37
WEEE Compliance 37
China RoHS 37
Index

Keysight W4630 Series DDR4 DRAM BGA Interposers
Installation Guide
1Introduction
W4630 Series DDR4 BGA Interposer - Introduction / 8
Hardware and Software Requirements / 12
Mechanical Considerations / 13
DDR3 Probes / 17
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
8Keysight W4630 Series DDR4 DRAM BGA Interposers Installation Guide
W4630 Series DDR4 BGA Interposer - Introduction
The DDR4 DRAM BGA Interposers enable probing of embedded DDR4 DRAM (currently x4 and x8)
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). 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 cables.
The W4630 Series interposers are compatible with the Keysight U4154A AXIe-based Logic Analyzer
module. Currently, in this series, Keysight provides the W4633A DDR4 x4/x8 BGA interposers.
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:
3 Flex wings with ZIF
connectors

Keysight W4630 Series DDR4 DRAM BGA Interposers Installation Guide 9
Introduction 1
• 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.
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 21.
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.

1 Introduction
10 Keysight W4630 Series DDR4 DRAM BGA Interposers Installation Guide
E5849A Single-ended ZIF Probe Cable
Two E5849A probe cables are required to connect the W4633A interposer to a Logic Analyzer
module using four U4201A logic analyzer cables.
Figure 3 E5849A Single-ended ZIF probe cable
To know how to make connections between the W4633A interposer and E5849A probe cables, refer
to the topic “Connecting the W4633A Interposer to E5849A Probe Cables" on page 23.
Right and left wings to connect to the
bottom side of the W4633A interposer
wings
Three pods to connect to the U4201
Logic Analyzer cables

Keysight W4630 Series DDR4 DRAM BGA Interposers Installation Guide 11
Introduction 1
U4201A 90-pin Logic Analyzer Cables
The U4201A logic analyzer cable connects the E5849A probe cable to pods of the U4154A
AXIe-based logic analyzer module.
Figure 4 U4201A 90-pin logic analyzer cable
To know how to make connections between the U4201A cable and E5849A probe cable, refer to the
topic “Connecting the E5849A Probe Cables to a Logic Analyzer" on page 27.
Connects to one of the pods of a Logic
Analyzer module
Connects to a pod of the E5849A ZIF
probe cable

1 Introduction
12 Keysight W4630 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 W4633A BGA interposers and cable adapters required to
provide connections to channels of your logic analyzer module.
Hard ware Requirements
U4154A 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
W4633A DDR4 x4/x8 BGA Interposer(s)
E5849A 46-ch single-ended ZIF probe cables to connect the W4633A interposer to U4201A Logic Analyzer cables
Two E5849A cables needed for each W4633A interposer
U4201A 90-pin Logic Analyzer cables to connect the E5849A probe cables to U4154A module’s analysis pods
Four U4201A cables needed for each W4633A 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/la-sw-download.
DRAM Data Width Access to Number of
Interposers
Number of ZIF
Probes
Number of
Cables
Number of Logic Analyzer Mod ules
x4 x4 Command,
Address, Control
and Data
One W4633A Two E5849A Four U4201A One U4154A module
x8 x8

Keysight W4630 Series DDR4 DRAM BGA Interposers Installation Guide 13
Introduction 1
Mechanical Considerations
W4633A Interposer Dimensions
The following figure shows the dimensions of a W4633A DDR4 DRAM BGA interposer.
Figure 5 Dimensions of a W4633A interposer

1 Introduction
14 Keysight W4630 Series DDR4 DRAM BGA Interposers Installation Guide
Figure 6 Dimensions of a W4633A interposer’s signal finger
Keep-Out Volume
NOTE
You must install the W4633A interposer on a riser (shipped with the interposer) or a grypper
socket to provide clearance to surrounding DRAM and RCs on the bottom side of the
interposer.

Keysight W4630 Series DDR4 DRAM BGA Interposers Installation Guide 15
Introduction 1
Figure 7 KOV of a W4633A interposer
The following figure shows the KOV of an E5849A probe cable when connected to a W4633A
interposer.

1 Introduction
16 Keysight W4630 Series DDR4 DRAM BGA Interposers Installation Guide
Figure 8 KOV of a W4633A interposer with an E5849A cable (SIDE VIEW)

Keysight W4630 Series DDR4 DRAM BGA Interposers Installation Guide 17
Introduction 1
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 DRAM96 ball BGA probe.
• E5845A adapter cable for W3631A and W3636A probes.
• E5847A adapter cable for W3633A probe.
• W3635B DDR3 oscilloscope probe adapter.

1 Introduction
18 Keysight W4630 Series DDR4 DRAM BGA Interposers Installation Guide

Keysight W4630 Series DDR4 DRAM BGA Interposers
Installation Guide
2Setting up the W4630-Series
Interposers
W4633A Interposer Setup - Overview / 20
Soldering the W4633A Interposer and Riser / 21
Connecting the W4633A Interposer to E5849A Probe Cables / 23
Connecting the E5849A Probe Cables to a Logic Analyzer / 27

2 Setting up the W4630-Series Interposers
20 Keysight W4630 Series DDR4 DRAM BGA Interposers Installation Guide
W4633A Interposer Setup - Overview
1 Solder the riser, interposer, and memory components. (See page 21)
2 Connect the interposer flex wings to E5849A probe cables. (See page 23)
3 Connect the E5849A probe cables to a U4154A Logic Analyzer module’s pods via U4201A logic
analyzer cables. (See page 27)
CAUTION
Use ESD precautions. Electrostatic discharge can damage components on your board or in the
interposer. Use a grounded wrist strap and other ESD control measures as appropriate.
NOTE
Do not open the vacuum sealed packs of the W4633A interposer until you are ready to install
the interposer. Discard these packs once the package is opened.