Agilent/Keysight W2639A

The Keysight W2639A is an oscilloscope adapter board that enables probing of LPDDR SDRAM, LPDDR NVM, and mobile-DDR DRAM devices in BGA packages. It provides non-intrusive electrical and mechanical access to memory signals, minimizing performance impact while facilitating detailed signal measurement and characterization. The W2639A connects LPDDR BGA probes to Keysight Infiniium oscilloscopes via the E2678A InfiniiMax socket probe head, supporting both x16 (60-ball) and x32 (90-ball) packages with access to all signals. Each order includes two adapter boards, soldered between the DRAM and PCB or DIMM.

– Technical Specifications

• Bandwidth: 1.5 GHz
• Operating Transfer Rate: Up to 400 Mb/s and 500 Mb/s
• Rise Time: 233 ps
• Input Impedance: 200 Ω
• Signal Isolation: Buried resistors minimize capacitive loading
• Soldering Compatibility: Tolerates lead-free soldering temperature profiles; compatible with all solder finishes

– Key Features

• Supports LPDDR SDRAM, LPDDR NVM, and mobile-DDR DRAM in BGA packages
• Direct signal accessibility at Ball Grid Array package level
• x16 package (60 balls) — all signals accessible
• x32 package (90 balls) — all signals accessible
• Two adapter boards per order
• Designed for minimal signal loading and performance degradation

– Typical Applications

• Clock characterization on LPDDR memory devices
• Electrical parameter measurement per JEDEC specifications
• Timing analysis and signal integrity verification
• Mobile DRAM device validation and debugging

– Compatibility & Integration

• Probes: Keysight W2637A (x16) and W2638A (x32) LPDDR probes
• Oscilloscope Interface: E2678A InfiniiMax socket probe head with Infiniium 9000 and 90000 Series oscilloscopes
• Logic Analyzer Interface: E5384A and E5826A single-ended ZIF probes with 16900 Series logic analysis systems
• Integration: Works with W2637A/W2638A probes for oscilloscope or logic analyzer configuration