Keysight LPDDR4, Installation Manual

Page: 22 / 80

3 Introduction to W6602A LPDDR4 BGA Interposer
22 Keysight W6600A-series LPDDR4 BGA Interposers Installation Guide
W6602A LPDDR4 RC BGA Interposer, 200-ball, Rigid
The W6602A interposer is a rigid interposer that connects to U4207A zero ohm, Soft Touch Pro,
single-ended probes/cables. These cables are then directly connected to the U4164A Logic Analyzer
module’s pods.
The W6602A LPDDR4 BGA Interposer enables passive probing of 200-pin JEDEC standard footprint
directly at the ball grid array using the Keysight U4164A logic analyzers.
The W6602A interposer can work in the following configurations of a 200 ball LPDDR4 DRAM:
• An LPDDR4 DRAM used as two 16-bit channels
• An LPDDR4 DRAM used as a single 32-bit channel
This interposer supports:
• probing of all CA and DQ/DQS signals for both channels of a 200 ball LPDDR4 DRAM.
• high speed data capture (data rates up to 3.2 Gb/s)
• lower system loading
NOTE
The W6602A interposer with the U4207A cable passively monitors the LPDDR4 200-ball DRAM
package. After tuning the Keysight logic analyzer, Command/Address bits can be reliably
captured up to 3200 MT/s using this interposer and cable. However, at some data rates, the logic
analyzer may not be able to provide an error-free capture of all DQ data bits.
NOTE
If the DRAM is used as a single 32-bit channel device, then the W6602A interposer probes and
uses only one set of CA signals as the single channel 32-bit configuration implies that the two
CA channels on the DRAM are identical.