Agilent/Keysight U4209A

The Keysight U4209A is a specialized probe/cable assembly that bridges high-speed DDR4 BGA interposers to logic analyzer modules for detailed signal acquisition and analysis. It terminates in a 61-pin Zero Insertion Force (ZIF) connector on the interposer side and dual 160-pin connectors for direct connection to the U4164A logic analyzer front panel. This configuration enables simultaneous capture of address, command, and data signals across multiple sampling states, making it essential for DDR4 functional and protocol debug workflows.

Technical Specifications

• 61-pin ZIF probe connector (interposer-side termination)


• Dual 160-pin direct-connect connectors (logic analyzer interface)


• Designed for high-speed digital signal capture with controlled impedance and signal integrity


• "No RC" configuration (resistor-capacitor network absent)

Key Features

• Connects directly from the right wing of W4640A Series DDR4 BGA interposers to U4164A AXIe-based logic analyzer modules


• Supports dual operating modes on the U4164A: normal state mode for address and command signals, quad sample state mode for data signal acquisition


• Part of the Keysight U4200A-series probe and cable family


• Eliminates intermediate cabling between interposer and analyzer

Typical Applications

• DDR4 memory interface debug and characterization


• Protocol-level analysis of address, command, and data bus signals


• Functional validation of memory subsystems during design and manufacturing

Compatibility & Integration The U4209A integrates with the Keysight DDR4 analysis ecosystem. It requires W4640A Series DDR4 BGA interposers for Device Under Test connection and interfaces exclusively with U4164A logic analyzer modules equipped with 160-pin front panel connectors. Configuration presets for the W4640A interposers and U4208A/U4209A probe/cable combinations ship with the B4661A memory analysis software. Reference documentation includes the U4200A-Series Probes and Cables User Guide and DDR4 Functional/Protocol Debug and Analysis Reference Solution configuration guides.