Agilent/Keysight E5845A

The Keysight E5845A is a single-ended ZIF probe designed for high-speed DDR3 DRAM characterization. It serves as the interface between W3631A DDR3 DRAM BGA probes and compatible Keysight logic analyzers, enabling capture of memory bus signals during real-time operation.

– Technical Specifications

• 46 total channels: 44 single-ended data channels + 2 differential clock channels
• Maximum data rate: 1333 Mb/s
• Equivalent load capacitance: 1.5 pF
• Minimum signal amplitude: 250 mV p-p
• Connector type: Single-ended ZIF (Zero Insertion Force) probe

– Key Features

The probe’s low parasitic load of 1.5 pF minimizes signal integrity degradation on DDR3 bus lines. Its ability to measure signals as low as 250 mV p-p provides margin for reliable capture of reduced-swing memory signaling. The ZIF connector design enables quick probe connection and disconnection without applied force, reducing risk of probe or target damage during debug sessions.

– Typical Applications

The E5845A addresses memory validation and troubleshooting workflows for DDR3 systems. Engineers use it to capture protocol-level behavior on memory buses, verify timing relationships between address, control, and data signals, and isolate signal integrity issues in high-speed memory interfaces operating at 1333 Mb/s data rates.

– Compatibility & Integration

The E5845A connects directly to the W3631A DDR3 DRAM BGA probe and integrates with Keysight 16900 Series Logic Analyzers and the U4154A Logic Analyzer Module via 90-pin cable connectors. Though discontinued, the product remains currently supported by Keysight.