Agilent/Keysight U4205A

The Keysight U4205A is a 34-channel single-ended logic analyzer probe that connects directly to target systems via a 38-pin AMP MICTOR connector. It enables forward compatibility by allowing newer Keysight logic analyzers to interface with systems originally designed for the E5346A probe. The U4205A terminates to either Keysight 16850-series portable logic analyzers or U4154A AXIe-based modules through a 160-pin interface.

Technical Specifications

• Channels: 34 single-ended


• Connector: 38-pin AMP MICTOR (target system) / 160-pin (logic analyzer interface)


• Data Rate: Up to 600 Mb/s state speed


• Clock Speed: Up to 600 MHz


• Sensitivity: 300 mV peak-to-peak


• Signal Integrity Model: Equivalent probe load accurate to 1 GHz


• Thresholds: Independently adjustable logic and clock inputs via user interface

Key Features

• Single-ended data and clock architecture with independent threshold adjustment


• Direct probe connection eliminates additional cabling between target and analyzer


• Backward compatibility with E5346A probe footprints simplifies board-level integration


• Connector footprint and mounting hole dimensions provided for target system PCB design


• Probe load model extends to 1 GHz for accurate signal integrity prediction

Typical Applications

• Embedded system debug and validation using portable logic analyzers


• In-circuit protocol analysis on systems with MICTOR 38-pin connectors


• Logic state and timing capture at speeds up to 600 MHz


• Integration with existing target hardware designed for legacy probe interfaces

Compatibility & Integration Supported logic analyzers: Keysight 16851A, 16852A, 16853A, 16854A (16850-series), and U4154A AXIe module. Target system connection requires a probing connector kit such as the E5346-68701 or E5346-68700, which includes mating connectors and support shrouds. Complete circuit board layout guidance and transmission line considerations are documented for optimal measurement fidelity.