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National Instruments · PXI

PXI-6551

The National Instruments PXI-6551 is a 50 MHz, 20-channel PXI digital waveform generator/analyzer for digital stimulus-response testing. NI identifies memory-chip functional testing and bidirectional communication as product applications.

ManufacturerNational Instruments

ModelPXI-6551

Part Number778538-01 · 778538-02

Product TypeDigital waveform generator/analyzer

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Maximum clock rate50 MHz

Digital channels20

Instrument functionDigital waveform generation and analysis

Programmable voltage range-2.0 to 5.5 V; consult device specifications for operating restrictions

Driver familyNI-HSDIO

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Overview

Product overview

Key product information and technical features.

The PXI-6551 combines digital stimulus generation and response analysis in the PXI platform. Its 20 channels and 50 MHz clock capability support memory-chip functional testing and bidirectional digital communication.

NI-HSDIO documentation lists the PXI-6551 as supported hardware and describes per-cycle, per-pin tristate support for NI 655x devices. NI also provides application guidance for interfacing PXI-655x instruments to ECL logic using suitable wiring, voltage settings, and termination.

Digital waveform generation and response analysis in one PXI instrument.
20 digital channels with a maximum clock rate of 50 MHz.
Programmable voltage levels spanning -2.0 to 5.5 V, subject to device operating restrictions.
Per-cycle, per-pin tristate support through NI-HSDIO for NI 655x devices.

Verified specifications

Technical data

Verified product specifications.

Maximum clock rate	50 MHz
Digital channel count	20 channels
Programmable voltage range	-2.0 to 5.5; operating restrictions apply V
Platform	PXI
Per-cycle, per-pin tristate	Supported for NI 655x devices through NI-HSDIO

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National Instruments

Manufacturer

PXI

Instrument platform

PXI-6551

Digital waveform generator/analyzer

Software driver

NI-HSDIO documentation explicitly lists PXI-6551 support.

Confirm the exact hardware variant, voltage restrictions, and NI-HSDIO release requirements before system integration.

Manuals & software

Technical resources

Manuals, software and technical resources for this model.

PXI-6551 Official Product Support PageProduct Support Page · ni.com

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PXI-6551 Dimensional DrawingsDimensional Drawings And CAD Resources · ni.com

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NI-HSDIO 1.5.1 Instrument Driver ReadmeHistorical Driver Readme · download.ni.com

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Interfacing NI PXI-655x Digital Waveform Generator/Analyzers to ECL Logic FamiliesTechnical resource

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FAQ

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Product-specific answers based on available technical information.

Is the PXI-6551 a generator or an analyzer?

It performs both functions: NI describes it as a digital stimulus-response waveform generator/analyzer.

How many channels and what clock rate does the PXI-6551 provide?

The PXI-6551 provides 20 digital channels and a maximum clock rate of 50 MHz.

Which driver supports the PXI-6551?

NI-HSDIO supports the PXI-6551. The linked version 1.5.1 readme is historical evidence of hardware support, not a recommendation for a particular operating system or current software installation.

How does the PXI-6551 differ from the PXI-6552?

NI lists the PXI-6551 at 50 MHz and the PXI-6552 at 100 MHz. They are separate models; this catalog record is specifically for the PXI-6551.