Keysight LPDDR4, Installation Manual

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Keysight W6600A-series LPDDR4 BGA Interposers
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:
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.