Options up to 4 Gb/s State Mode and 10 GHz Timing Mode

The Keysight U4164A logic analyzer system combines reliable data capture with powerful analysis and validation tools to enable you to quickly and confidently validate and debug high-speed digital designs operating at speeds up to 4 Gb/s. The U4164A logic analyzer module delivers the following unique capabilities that enable you to make measurements and achieve levels of insight unavailable with other logic analyzers

The U4164A logic analyzer module has two modes of operation: quad sample state mode and 10 GHz quarter channel timing mode. Quad sample state mode achieves four different sample positions at two independently adjusted thresholds from a single probe point on each input.

Quad sample state mode means less space is required to probe high data rate signals such as DDR4, DDR5, LPDDR4, and LPDDR5 that require different sample positions for read and write data and separate rising edge / falling edge samples for data rates greater than 2.5 Gb/s. Quarter channel (10 GHz) timing mode provides up to 1.6 Gb samples per input. In addition to the new modes of operation, the U4164A logic analyzer module includes multiple new features to help high-speed digital and DDR / LPDDR memory design engineers accelerate turn-on and debugging their systems. The U4164A features a timing mode de-skew control, dual thresholds in dual sample state mode, clock hysteresis control to adjust the state mode sensitivity to noise, and the industry's deepest memory depth option (400 Mb full channel, 800 Mb half-channel, and 1.6 Gb in quarter-channel).

To enhance insight from the U4164A trace captures, the B4661A Memory Analysis software offers tools to accelerate setup and configurations for DDR / 2 / 3 / 4 / 5 and LPDDR / 1/ 2 / 3 / 4 / 5 measurements and a variety of licensed options for DDR / 2 / 3 / 4 / 5, LPDDR / 1 / 2 / 3 / 4 / 5 and ONFi (Open NAND Flash interface) memory analysis and accomplice validation.

  • State speed mode options up to 4 Gb/s
  • Quad sample state mode provides four samples at two different thresholds from single probe point
  • Clock hysteresis settings for state mode
  • Full memory depth timing modes up to 10 GHz
  • Up to 400 Mb memory depth options (400 Mb full channel timing, 800 Mb ½ channel timing, 1.6 Gb ¼ channel timing)
  • De-skew interface for timing modes
  • Eye scan technology with up to 5 ps x 5 mV scan increments
  • 12.5 GHz, 256K deep timing zoom

Key Specifications

Number of Channels
Max Memory Depth
400 Mpts
Number of Channels
Max Memory Depth
400 Mpts
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Max Memory Depth:
400 Mpts
Number of Channels:
U4164A Logic Analyzer Module

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For more information about logic analyzers, please see the Keysight logic analyzer page.  

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