Keysight LPDDR4, Installation Manual

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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.