Keysight L4450A Datasheet

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Keysight Technologies

L4450A 64-Bit Digital I/O with Memory and Counter

Data Sheet

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Introduction

64-bit Digital I/O offers high-performance digital I/O wherever your application needs it

The Keysight Technologies, Inc. L4450A is a high-speed 64-bit digital I/O instrument that is LXI Class C compliant. With its small size and Ethernet connectivity, the Digital I/O can be placed wherever your application needs it.

The Keysight L4450A has 64 bi-directional lines congured as eight 8-bit channels. Each 8-bit channel has programmable polarity and thresholds up to 5 V. The 128 k of memory is useful for simulating and capturing digital patterns up to 10 MHz. The congurable handshaking protocols can be used for a wide variety of

applications.

In addition, the two 10 MHz counter channels can be used to count events, frequency, period, duty cycle, pulse width and totalize.

Using this LXI instrument, you’ll get all the benets of an Ethernet connection, built-in instrument web

interface, standard software drivers and more. The LXI standard is supported by multiple vendors, enabling lower cost of test with accelerated test integration and development.

– LXI compliance includes built-in Ethernet connectivity

– Fully-featured graphical web interface

– 64 bi-directional digital I/O bits with programmable polarity

– Variable thresholds from 0 V to 5 V

– Handshaking protocols

– Source/sink current up to 24 mA

– 128 kbytes pattern memory

– Two 10 MHz counter channels

– 20 MHz divide-by-n clock

– Software drivers for most common programming environments

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Digital inputs and outputs for your most complicated digital applications

The L4450A can be used to simulate or detect digital patterns. It has eight 8-bit digital I/O channels with handshaking, pattern memory, two 10 MHz counters with gate functions, and a programmable clock output.

Digital input/output

The digital I/O bits are organized into two banks of 32-bits. The I/O bits can be configured and programmed as inputs or outputs in 8-bit channels. The digital outputs can be configured as active drive or open drain outputs with a user supplied 10 kΩ pull up. User supplied pull-up resistors for up to 5 V outputs are also acceptable. The digital inputs have programmable thresholds up to 5 V for compatibility with most digital logic standards. The on-board pattern memory can be used to select and output digital stimulus or bit stream patterns, or to capture external digital data. Each bank has independent memory and directional control so that one bank can output data while another captures data. The memory can be divided up to 64 kbytes per 8-bit channel.

The memory can be allocated as follows:

Default configuration

Channel 1/5 (bits 7:0) (bits 39:32)

Channel 2/6 (bits 15:8) (bits 47:40)

Channel 3/7 (bits 23:16) (bits 55:49)

Channel 4/8 (bits 31:24) (bits 63:56)

The digital channels also have:

– Variable active high drive output

from 1.65 V to 5 V or open drain

– Variable input thresholds from 0 V

to 5 V

– Conﬁgurable handshaking proto-

cols including synchronous and strobe

– Programmable polarity

– Source or sink up to 24 mA

32 kbytes 64 kbytes 64 kbytes

32 kbytes 64 kbytes

32 kbytes

Memory on channels 1 & 2

– Internal alarming for maskable

pattern match

– 1 hardware pattern interrupt per

bank

External trigger capabilities make it easy or you to time and synchronize measurements and other events. This can help you determine when to begin or end an acquisition.

Memory on channel 1

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Frequency counter and totalizer

The two channels can be used to count digital events, frequency, period, duty cycle, pulse width and totalize. The counter/totalizer also includes:

– Programmable gate functionality

– Programmable input thresholds

levels 0 V to 3 V

System connections you can trust

The L4450A comes with 2 heavy duty 78-pin Dsub connectors that allow for simple, reliable connection options. Each connector uses 30 micro-inches of gold to ensure a repeatable, accurate measurement. Other connection options include:

Figure 1. L4450A 64-bit digital I/O with counter.

– Detachable terminal blocks with

strain relief

– Low-cost, standard 78-pin Dsub

connector kits and cables

– Mass interconnect solutions

Ethernet connectivity enables simple connection to the

network and remote access to

measurements

The Ethernet interface offers highspeed connections that allow for remote access and control. You can set up a private network to filter out unwanted LAN traffic and speed up the I/O throughput, or take advantage of the remote capabilities and distribute your tests worldwide. Monitor, troubleshoot, or debug your application remotely. Ethernet communication also can be used with the support of LAN sockets connections.

The optional GPIB interface has many years of proven reliability and can be used for easy integration into existing applications.

The L4450A ships with the Keysight E2094N I/O Libraries Suite, which enables connections for Keysight and non-Keysight modular and traditional instruments. This makes it easy for you to configure and integrate instruments into your system.

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Fully-featured graphical web

interface makes it easy to

set-up and troubleshoot your tests from anywhere in the world

The built-in web interface provides remote access and control of the instrument via a Java-enabled browser such as Internet Explorer. Using the web interface, you can set up, troubleshoot, and monitor your instrument from remote locations.

– View and modify instrument setup

– Conﬁgure I/O channels, patterns

and alarms

– Read and write I/O channels

Figure 2. The Web interface makes it easy to set up, troubleshoot and monitor your test remotely.

– Load and step digital patterns

– Deﬁne handshaking and memory

allocation

– View error queue

– Get status reports, current con-

ﬁguration, ﬁrmware revisions, and more

Additionally, since the web interface is built into the instrument, you can access it on any operating system that supports a web browser without having to install any special software. Password protection and LAN lockout are also provided to limit access for additional security.

Software for most popular programming environments

Full support for standard programming environments ensures compatibility and efficiency. You can use direct I/O with the software you already have and know, or use standard IVI and

LabVIEW software drivers that provide compatibility with the most popular development environments:

– Keysight T&M Toolkit for

Microsoft Visual Studio.NET and Keysight VEE Pro

– National Instruments LabVIEW,

LabWindows/CVI, TestStand, and Switch Manager

– Microsoft C/C++ and Visual

Basic

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High-performance switching wherever your application needs it

Power button

Status LEDs

Easy connection options with terminal blocks, standard 78-pin cables or connector kits

Optional GPIB

External trigger to synchronize events

Built-in Ethernet

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Product specications

Digital input/output characteristics

Eight 8-bit channels: 8 bits wide, input or output, non-isolated Vin 0 V – 5 V

Vout 1.65 V – 5 V

Iout (max) 24 mA

Frequency (max) 10 MHz

(max) 400 mA

Load

programmable

n 24-bits, programmable on/off

Handshake lines

Counter function characteristics

Totalizer function characteristics

System clock generator characteristics

+ t

rise

(typ) 6 ns

fall

Vin 0 – 5 V

Vout 1.65 – 5 V

I out (max) 24 mA

Frequency (max) 10 MHz

Maximum frequency 10 MHz (max) 50% duty cycle

Vin 0 V – 5 V

Maximum count 2^32 – 1 (4,294,967,296)

Maximum input frequency 10 MHz (max), rising or falling edge

Vin 0 V – 5 V

Gate Input 0 V – 5 V

Frequency 20 MHz – 10 Hz configurable divide-by-

Vout 1.65 V – 5 V

I out (max) 24 mA

Accuracy 100 ppm

1,2

2,4

1. Conﬁgurable by 8-bit channel

2. Lower current drive at lower voltages

3. From memory with handshaking

4. Conﬁgurable by bank

5. 5 V, 50 pF load

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Product specications (continued)

Data out of memory to LAN or GPIB

(Data transfers rate with 1000 channel blocks) GPIB

rds/s

Readings 2560 3542

Readings with timestamp 1304 1826

Readings with all format options ON

Scan triggering

Source Internal, external, software, or on monitor channel alarm

Scan count 1 to 50,000 or continuous

Scan interval 0 to 99 hours; 1 ms step size

Channel delay 0 to 60 seconds per channel; 1 ms step size

External trig delay <2 ms. With monitor on <200 ms

External trig jitter <2 ms

Alarms

Digital inputs Digital in maskable pattern match or state change frequency and

Alarm on channel Alarm evaluated each reading

Alarm outputs 2 TTL compatible

Latency 5 ms (typical)

Memory

Type Volatile

Size 128 kbytes for digital patterns

States 5 instrument states with user label in non-volatile memory

General system specications

Power supply Universal 100 V to 240 V ±10%

Power line frequency 50 Hz to 60 Hz ±10% automatically sensed

Power consumption 15 VA

Operating environment Full accuracy for 0°C to 55°C

Storage environment -40°C to 70°C

Dimensions (H x W x L) 40.9 x 212.3 x 379.3 mm

Weight 3.7 kg, 8.2 lbs

Safety conforms to CSA, UL/IEC/EN 61010-1

EMC conforms to IEC/EN 61326-1, CISPR 11

Warranty 3 years

980 1361

totalize: Hi limit only

Selectable TTL logic Hi or Lo on fail

Full accuracy to 80% R.H. at 40 °C

1.61 x 8.36 x 14.93 in

LAN (w/ VXI 11) rds/s

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Product specications (continued)

Software

Keysight connnectivity software included

Minimum system requirements

PC hardware Intel Pentium 100 MHz, 64 Mbyte RAM, 210 Mbyte disk space

Operating system

Computer interface

Software driver support for programming languages

Software drivers IVI-C and IVI-COM for Windows NT/2000/XP

Compatible with programming tools and environments

Keysight VEE Pro

National Instruments TestStand

Microsoft Visual Studio.NET

Keysight I/O Libraries Suite 14 or greater (E2094N)

Display 800x600, 256 colors, CD-ROM drive

Windows 98 SE/NT/2000/XP

Standard LAN 10BaseT/100BaseTx

Optional IEEE 488.2 GPIB

LabVIEW

T&M Toolkit (requires VisualStudio.NET)

Measurement Studio

LabWindows/CVI

LabVIEW

Switch Executive

C/C++

Visual Basics 6

1. Load I/O Libraries Version M for Windows NT support or version 14.0 for Windows 98 SE support

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Ordering information

Related literature

L4450A 64-bit Digital I/O with memory and counter

Includes User’s guide on CD, power cord, and Quick Start package

Option GPIB

Adds GPIB interface

Option 0B0

Deletes printed manual set, full documentation included on CD ROM

Option ABA

English printed manual set

Connection Options

Select terminal block for discrete wiring, cables or connector kits. Cables and connector kits require 2 per instrument.

34950T

Terminal block for 34950A and L4450A 64-bit Digital I/O

Other accessories

Y116 0A

Rack mount kit for L4400 series instruments-racks 2 instruments sideby-side with sliding tray

Note: when using the L4400 series rack mount kit, use the Y1139A solder cup connector kit rather than the 34921T terminal block.

For additional information please visit:

http://www.keysight.com/find/ L4450A

Data sheets

5988-6302EN, Keysight VEE Pro

5989-1441EN, Keysight W1130B T&M

Toolkit 2.1 with Test Automation

5989-1439EN, Keysight E2094N I/O Libraries Suite 15.5

Y113 7A

1.5 m 78-pin Dsub, M/F twisted pair with outer shield cable – 300 V

Y113 8A

3 m 78-pin Dsub, M/F twisted pair with outer shield cable – 300 V

Y1142 A

Solder cup connector kit with female 78-pin Dsub

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11 | Keysight | L4450A 64-Bit Digital I/0 with Memory and Counter - Data Sheet

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(BP-05-29-14)

This information is subject to change without notice. © Keysight Technologies, 2013 - 2014 Published in USA, August 3, 2014

5989-4829EN

www.keysight.com